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Digital Equipment RW504-ZA Service Manual

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Small Optical Disk Library
Service Manual
Part Number: EK–SOL10–SV.B01
Revision/Update Information:
Digital Equipment Corporation
Maynard, Massachusetts
This manual supersedes Part Number
EK–SOL10–SV.A01.

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Summary of Contents for Digital Equipment RW504-ZA

  • Page 1 Small Optical Disk Library Service Manual Part Number: EK–SOL10–SV.B01 Revision/Update Information: This manual supersedes Part Number EK–SOL10–SV.A01. Digital Equipment Corporation Maynard, Massachusetts...
  • Page 2 The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. Digital Equipment Corporation assumes no responsibility for the use or reliability of its software on equipment that is not supplied by Digital or its affiliated companies.

  • Page 3: Table Of Contents

    Contents Preface ..........1 Introduction Optical Disk Libraries Overview .
  • Page 4 Moving the RW504/RW524 Optical Disk Library ..2–12 2.8.1 Moving a Short Distance ..... . . 2–12 Shipping the RW504/RW524 Optical Disk Library .
  • Page 5 4.10.2 Electronic Core Tests ......4–38 4.11 The FIND HOME Sequence and Information Logs ..4–41 Specific Steps of the FIND HOME Sequence .
  • Page 6 6.4.1 Controller PCA ....... 6–8 6.4.1.1 SCSI Controller ......6–9 Data Buffer .
  • Page 7 B Basic Supplies and Reorderable Parts Basic Supplies and Reorderable Parts ....B–1 C Connecting Multiple Optical Libraries Connecting Two Optical Library Units to Two SCSI Ports .
  • Page 8 5–10 Drive Mounting Screws and Optical Sensor Cable Locations ........5–19 5–11 Sliding the Drive Mechanism Out of the Library .
  • Page 9 Tables Conventions Used in This Guide ....1–1 RW504/RW524 Components ..... 1–4 1–2 Optical Disk Library Products Matrix .

  • Page 11: Preface

    Chapter 1 provides an introduction that lists the features and components, product configurations, and the characteristics of the drive mechanism and the disks for the RW504-ZA and the RW524-ZA optical disk libraries. This manual refers to these optical disk libraries as RW504 and RW524.

  • Page 12: Conventions Used In This Guide

    Conventions Used in This Guide Table 1 Conventions Used in This Guide Convention Italics Italic text is used for titles of manuals and other publications. Monospace type Anything that is displayed on the control panel of the optical disk library is set in this monospace type. Boldface type Anything that you are asked to type is set in this boldface type.

  • Page 13: Introduction

    Introduction 1.1 Optical Disk Libraries Overview The RW504-ZA and RW524-ZA are optical disk libraries that contain a multifunction optical drive. They have storage slots for sixteen 5.25-inch optical disks for a total storage capacity of 10 Gbytes or 20 Gbytes, respectively.

  • Page 14: Optical Library Components

    DEC magneto optical disks meet the following standards: 594 Mbyte rewritable optical disks are Continuous Composite (CC) format, conform to ISO/IEC 10089A; ANSI X3.212-199x and 1.2 Gbyte optical disks meet ECMA 184 standard for CC format. 594 Mbyte write-once disks are Continuous Composite Write-Once (CCW) format, conform to ISO/IEC DIS 11560;...

  • Page 15: Optical Disk Library Components

    Figure 1–1 Optical Disk Library Components Carriage & Rails Mailslot Storage Slots Picker Disk Drive MK445−01 Introduction 1–3...

  • Page 16: The Optical Drive Mechanism

    Table 1–1 RW504/RW524 Components Component Description Disk Drive The optical disk library contains one multifunction optical disk drive for read/write data transfer. The drive requires its own unique SCSI address and is located next to the front panel at the bottom of the optical library. See Section 1.3.1 for additional drive information.

  • Page 17: Magneto-Optical Disks

    uninterruptable power supply (UPS) be used with battery backup to ensure that no data is lost if a power failure occurs. 1.3.2 Magneto-Optical Disks Magneto-Optical (MO) disks are more durable, more reliable, removable, and cost far less per megabyte than magnetic disks. MO disks are made of the same kind of plastic used in bullet-proof windows.

  • Page 18: Differential Scsi Interface

    Table 1–2. Table 1–2 Optical Disk Library Products Matrix Product No. /Options Description HP Designation RW504-ZA 10.4-Gbyte multifunction optical disk library— Model 10LC includes one 650-Mbyte 5.25-inch multifunction (C1718C) optical drive mechanism and a single-ended SCSI interface.

  • Page 19: Specifications

    1.6 Specifications This section provides: • Performance Specifications • Physical Characteristics • Environmental Specifications • Power Requirements • Service Characteristics • Product Certification Introduction 1–7...
  • Page 20 Performance Specifications Optical Disk Library System Capacity 16 disks 10.4 Gbytes (RW504) or 20.8 Gbytes (RW524) Drives 1, 5.25-inch multifunc- tion 650-Mbyte (RW504) or 1.3-Gbyte (RW524) optical disk drive Average disk exchange time (excluding 7 seconds drive load/unload sequences) Interface Single-ended asyn- chronous SCSI Multifunction Optical Drives...
  • Page 21 Multifunction Optical Drives 650 Mbytes 1.3 Gbytes Read/Write error rate Less than 1 block in Less than 1 block error per 10 in error per 10 bytes bytes Less than 1 per 10 Seek error rate seeks Interface SCSI-2 SCSI-2 single-ended single-ended RW504/RW524 Physical Characteristics...
  • Page 22 RW504/RW524 Environmental Specifications operating 61.5 dB (L noise power emission level) idle 47 dB (L noise power emission level) Particulates Less than 200 micrograms/cubic meter particles suspended Electrostatic discharge Airgap (operating) 0 to 10 kV Airgap (nonoperating survival) 0 to 25 kV Direct contact (operating) 0 to 5 kV Direct contact (nonoperating survival)
  • Page 23 RW504/RW524 Product Certifications Electromagnetic emissions FCC 47 CFR Part 15 Subpart J - Class ‘‘B’’ EN 55022/CISPR 22, Level ‘‘B’’; SABS VCCI Level 2 Laser CDRH 21 CFR Chapter 1, Subpart J Registered IEC 825 TUV approved to VBG93, VDE 0837 TTL to Decision 472 BS 4803 part 2 Approved...

  • Page 24: Optical Disk Specifications

    1.7 Optical Disk Specifications Table 1–3 Specifications and Characteristics of Optical Disks Physical Characteristics Rewritable Write-once Disk 5.25 in. diameter (130 mm) 5.25 in. diameter (130 Capacity (512-byte 594 Mbytes (297 Mbytes/side) 594 Mbytes (297 Mbytes sectors) (1x) (formatted) /side) (formatted) Capacity (512-byte 1.2 Gbytes (594 Mbytes/side) 1.2 Gbytes (594 Mbytes...
  • Page 25 Table 1–3 (Cont.) Specifications and Characteristics of Optical Disks Environmental Specifications Rewritable Write-once Temperature (operating) 10° to 50° C 10° to 50° C Temperature (nonoperat- -10° to 50° C long term -10° to 50° C long term ing) (> 14 days) (>...

  • Page 26: Related Documents

    1.8 Related Documents Table 1–4 Related Documentation Item Part Number Optical Disk Library Conversion Kit Installation Guide EK–OLCON–IG Optical Library User’s Guide (Shipped with each unit) EK–STSOP–UG Optical Storage Desktop Software Installation Guide AA–PXYKA–TE Optical Storage Desktop Software User’s Guide AA–PXYLA–TE Optical Storage Management Software Installation Guide AA–PXYPA–TE...

  • Page 27: Environmental/Installation/Pm

    Environmental/Installation/PM 2.1 Environmental Requirements Note The environmental requirements listed here apply when the RW504 /RW524 optical disk library is not connected to a system. When this device is connected to a system, the more stringent environmental specifications listed for any single device within the system are applicable and supersede these specifications.

  • Page 28: Primary Power/External Ground

    2.4 Primary Power/External Ground The power outlet to be used to supply AC power to the RW504/RW524 optical disk library must be checked to ensure that the proper voltage is available for the drive. Permitted voltage range(s), depending on configuration and assuming 50-60 Hz, are 100 to 120 Vac and 200 to 240 Vac.

  • Page 29: Installation Procedures

    2.6 Installation Procedures This section provides information on: • Contents of shipment • Uncrating and installing an RW504/RW524 optical library • Connect multiple optical library systems together Setting up the optical disk library is the customer’s responsibility; however this service may be contracted for on a time-and-materials basis. Setup instructions for the disk library are in the Optical Library User’s Guide, part number EK–STSOP–UG, which is shipped with the product.

  • Page 30: Uncrating The Rw504/Rw524 Optical Library

    In addition to these items, to complete the installation you may need two wrenches—a 1/2 inch wrench and a 9/16 inch wrench—and a TORX T10, T15, T20, and T25 screwdriver (the blade is star-shaped) as well as wire cutters or a knife.
  • Page 31 Connecting the SCSI Cables To connect the SCSI cables to the optical library, perform the following steps. 1. Make sure the host computer and the optical library are switched off. 2. Locate a SCSI cable. 3. Locate the single-ended SCSI terminator. 4.

  • Page 32: Attaching The Scsi Cable To The Rw504/Rw524 Optical Disk Library

    Figure 2–2 Attaching the SCSI Cable to the RW504/RW524 Optical Disk Library MK445−06 Note You can position the optical library anywhere along the SCSI bus. Properly terminate the last device on the bus and do not exceed the total SCSI cable length limitations. a.
  • Page 33 Connecting Power CAUTION Verify that the shipping screw has been removed from the disk library before connecting power. Directions for removing the shipping screw are printed on the carton, or see Figure 2–1 for the location of the shipping screw. 1.

  • Page 34: Rear Panel

    Figure 2–3 Rear Panel Power Switch Voltage Select Switch Power Connector SCSI Connector MK445−05 5. Plug the power cord into the power outlet. 6. Press the power switch (located on the back panel) and the operation switch (located on the front panel) so they are in the ON position. Initially, the control panel displays TESTING .

  • Page 35: Checking The Fuse And Voltage Setting

    Note If you want to move the optical library, see Chapter 3. 2.6.4 Checking the Fuse and Voltage Setting The RW504/RW524 optical disk library should come from the factory configured according to the area designated as the final destination on the order form. Verify that the drive was configured correctly.

  • Page 36: Changing The Voltage Configuration

    2.6.4.1 Changing the Voltage Configuration CAUTION Do not switch off power to any peripheral on the SCSI bus without first checking that the bus is inactive. Switching off power to a peripheral on an active bus may cause data loss, indeterminite bus states, or both.

  • Page 37: Hardware Verification

    Note If the customer’s UPS does not provide a communication link between the UPS and the autochanger/computer system, someone will have to shut down the computer system before the UPS battery power is drained or data in the buffer may be lost. If the UPS is connected to the RW504/RW524 optical disk library, the power requirements shown in Table 2–2 must be met: Table 2–2 UPS Power Requirements...

  • Page 38: Moving The Rw504/Rw524 Optical Disk Library

    2.8 Moving the RW504/RW524 Optical Disk Library 2.8.1 Moving a Short Distance To move an RW504/RW524 optical disk library a short distance (down the hallway or to another floor in the building) perform the following steps. If you want to ship the disk library, see Section 2.8.2.

  • Page 39: Shipping The Rw504/Rw524 Optical Disk Library

    2.8.2 Shipping the RW504/RW524 Optical Disk Library If the disk library must be shipped, do the following steps. 1. Unmount (unreserve) any disk surfaces from the host system if necessary. 2. Eject all disks from the autochanger and, if the disks were not labeled with a storage slot location prior to inserting them into the autochanger, do it now.

  • Page 40: Replacing The Shipping Screw

    Note If the shipping screw has been misplaced, you can use a cap screw with the following specifications: • 6/32 UNC-2B screw • 1-3/8 inches long 7. Repackage the autochanger in its original shipping carton and have the unit shipped in the same manner in which it was received. Figure 2–4 Replacing the Shipping Screw Shipping screw location...

  • Page 41: Preventative Maintenance

    2.9 Preventative Maintenance There is no preventive maintenance for the optical disk library, however the optical disks may require cleaning. Cleaning an optical disk is needed more commonly on standalone drives than with autochangers because of the differences in their environments and usage. Although an autochanger may be used in such a way as to make disk cleaning necessary, it is not recommended.

  • Page 43: Product Operation And Configuration

    Product Operation and Configuration 3.1 Front Panel/Control Panel Operations Refer to Figure 3–1 for the location of the front panel controls and features. Table 3–1 lists and describes the callouts. Figure 3–1 Front Panel Mailslot 9−Character Display Operation Switch Selection Controls Drive Indicator MK445−03 Product Operation and Configuration 3–1...

  • Page 44: Front Panel Controls

    Table 3–1 Front Panel Controls Mailslot Allows you to insert or remove optical disks. Operation Switch Applies or removes power to enable or disable operation of the optical disk library. (This is NOT the power switch. The power switch is located on the rear panel.) Selection Controls Press these buttons to perform the desired operation.

  • Page 45: Rear Panel Features And Controls

    3.2 Rear Panel Features and Controls Refer to Figure 3–2 for the location of the rear panel controls and features. Table 3–2 lists and describes each control. Figure 3–2 Rear Panel Power Switch Voltage Select Switch Power Connector SCSI Connector MK445−05 Table 3–2 Rear Panel Features and Controls Power connector...
  • Page 46 Table 3–2 (Cont.) Rear Panel Features and Controls Power switch Used to switch on or off all power to the optical disk library. (This switch must be on before the operation switch on the front panel is functional.) Voltage select switch The voltage select switch allows the user to specify either a 115-volt or a 230-volt setting depending on the country in which the disk library will be used.

  • Page 47: Setting And Displaying Configurations

    3.3 Setting and Displaying Configurations 3.3.1 Setting a Configuration (CONF) Follow these steps if you wish to set an autochanger configuration. 1. With displayed, press until displays. READY CONF * NEXT 2. Press CONF 0 displays. (The is blinking.) ENTER 3.

  • Page 48: Choosing Tests And Displaying Results (Test)

    3.3.3 Choosing Tests and Displaying Results (TEST) Note A complete listing of diagnostic tests is given in Section 4.9 and Section 4.10. With displayed, press displays. READY TEST * NEXT 1. Press displays. TEST 0 ENTER 2. Press until the needed test number displays. NEXT PREV 3.

  • Page 49: Setting The Scsi Address

    3.3.4 Setting the SCSI Address Note Determine what SCSI device addresses are currently in use on the host system. You can then correctly determine what available SCSI addresses to use for the optical drive mechanism and the autochanger controller. The default address settings are as follows: •...

  • Page 50: Securing The Optical Disk Library

    3.3.5 Securing the Optical Disk Library In its default condition, the optical disk library is unsecured. Any user can insert or remove disks or access control panel displays, configurations, or tests. In an open environment, some precautions should be taken to secure access to the control panel as well as to the following: •...
  • Page 51 1. With displayed, press until displays. READY CONF * NEXT 2. Press CONF 0 appears in the display window ( is flashing). ENTER 3. Press until is displayed. CONF 17 NEXT You are now prompted to enter the old or default security code. 4.

  • Page 52: Restricting Disk Insertion And Removal

    3.3.7 Restricting Disk Insertion and Removal Configurations 15 and 20 act together to control disks during normal and power fail conditions. • CONF 15 - when this is set to ON, you cannot insert or remove disks without a security code. •...

  • Page 53: Controlling Mailslot Rotation

    3.3.8 Controlling Mailslot Rotation Configurations 31 and 32 allow control of mailslot rotation as described below. (See Section 3.3.1) Note In its default state, the optical disk library’s mailslot stays open, ready to accept an optical disk. The following configurations allow control over the mailslot’s position. •...

  • Page 54: Autochanger Configuration Choices

    3.4 Autochanger Configuration Choices The following table lists the available configurations choices. An explanation of how to access and set these configurations is found in ‘‘Setting a Configuration’’ in Section 3.3.1. Table 3–3 Autochanger Configuration Choices Function Default Options Clear/Save Error Log Save Clear - clears the error log (Information Log 0)
  • Page 55 Table 3–3 (Cont.) Autochanger Configuration Choices Function Default Options Clears/zeros these logs: Save - maintains the specified logs until clear is configured. #4 - Drive Load Count #5 - Poweron Hours #9 - Move #12 - Flip #14 - Mailslot Rotation Set Autochanger Retries Sets the number of attempts to A - Max.
  • Page 56 Table 3–3 (Cont.) Autochanger Configuration Choices Function Default Options Secured Mailslot Rotation Off - Normal mailslot operation. (security code required) On - The mailslot rotates in when configuration 15 is set to ON or a Prevent Media Removal command is received. The mailslot remains closed until configuration 15 is set to OFF or an Allow Media Removal command is received.
  • Page 57 Table 3–3 (Cont.) Autochanger Configuration Choices Function Default Options Zero all RAM Save Save - RAM remains unchanged. Clear - Zeros all RAM locations and reboots. Caution - When this configuration is set to ’’Clear,’’ the product ID and the vendor ID are cleared. DO NOT perform this configuration operation.

  • Page 59: Troubleshooting And Diagnostics

    Troubleshooting and Diagnostics This chapter is divided into the following sections: • Operation/Installation Error Information Lists common problems encountered during operation and installation of the optical disk library, and gives suggestions for solving these problems. (top-level troubleshooting) • Control Panel Error Information Provides error messages and log information which are available through the control panel display.

  • Page 60: Operation/Installation Error Information

    4.1 Operation/Installation Error Information Table 4–1 lists problems that may occur during operation of the optical disk library. If you cannot find a solution to a problem in this section, go to Section 4.5 for more in-depth troubleshooting. CAUTION DO NOT CYCLE POWER during any troubleshooting until you are sure the system SCSI bus is INACTIVE and will REMAIN INACTIVE.
  • Page 61 Table 4–1 (Cont.) Operation/Installation Troubleshooting Task Problem/Symptom What to do Changing the Changed drive address After changing an address, the autochanger drive address but new address is not power and/or the host system power may recognized. need to be cycled for the new address to be recognized.
  • Page 62 Table 4–1 (Cont.) Operation/Installation Troubleshooting Task Problem/Symptom What to do Power-on self-test fails. Turn the unit off, then turn it on again. Observe the power-on test result. If the unit continues to fail, use the error code to begin troubleshooting. (See Section 4.2 following this table.) Does not boot correctly.
  • Page 63 Table 4–1 (Cont.) Operation/Installation Troubleshooting Task Problem/Symptom What to do Reading the No display messages Make sure both the power switch (on the Front Panel appear. rear panel) and the operation switch (on Display Window the front panel) are switched on. Check that the power cord is connected.

  • Page 64: Power-On Self-Tests

    Table 4–1 (Cont.) Operation/Installation Troubleshooting Task Problem/Symptom What to do The unit’s power failed Try powering on the unit. If successful, use while a disk was in the the file system check command. drive. If power-on is unsuccessful, power the unit off.

  • Page 65: Optical Disk Cleaning

    3. Remove the disk library top cover. a. Remove the four T-20 screws on the back cover. b. Slide the top cover towards the back of the unit to free the four tabs from the sides of the autochanger chassis, and then pull the sides of the top cover out slightly while lifting the cover off.

  • Page 66: Cleaning Tools Available

    • Contamination of the drive objective lens On an otherwise working drive, check to see that the most current firmware code level is being used and/or that all applicable service notes have been done. If so, contamination could be a cause and cleaning may be necessary. In the case of a read failure, cleaning might be the only way to get the customer’s data back.

  • Page 67: Using The Eject Tool To Remove A Disk From The Drive

    4.4 Using the Eject Tool to Remove a Disk from the Drive The optical drive mechanism does not automatically eject a disk from the drive if a power failure occurs. If you need to manually remove a disk from a drive with no power, you must use the eject tool.

  • Page 68: Troubleshooting Using The Control Panel And Observation

    4.5 Troubleshooting Using the Control Panel and Observation When there are errors in autochanger movements, two main approaches are available to get information and to run execiser tests. The approach usually depends on whether the error encountered was a hard error or whether it was a soft (intermittent) error.

  • Page 69: The Autochanger Lists The First ''Possibles

    4.5.1 The Autochanger Lists the First ‘‘Possibles’’ At power-on, and after every failed move, the autochanger automatically runs an initialization sequence that comprehensively tests the autochanger. If a hard failure occurs, a list of possible FRUs that may have been at fault is returned. Keep in mind that these FRUs are not listed in any prioritized manner.

  • Page 70: How To Use The Results Of The Internal Tests

    • There is only one failed component. Simultaneous failures of unrelated items are not considered possible for purposes of this test. • Service will be done, if necessary, if a problem is found (i.e., the unit does not have to be left in a ‘‘clean’’ state). The test takes advantage of this and does whatever is necessary to determine the cause of the failure.

  • Page 71: How Service Views The Suspect Frus

    Figure 4–3 How Service Views the Suspect FRUs If you consider the suspect FRU as a POINTER to the problem area rather than the problem itself, an educated visual inspection, with perhaps some cable and connector wiggling, should reveal the real problem. A good visual inspection requires an understanding of how the autochanger acts under normal operation.

  • Page 72: The Fru Isolation Test Sequence

    The error (4D) and suspect FRU gave an AREA to look at when troubleshooting. Visual inspection (concurrent with physical checks) helps to link the suspect FRU with the root cause by providing an area to examine. In the preceding example, the components that INTERACT with, and DRIVE the picker are examined.

  • Page 73: Information Logs

    4.6 Information Logs The optical autochanger control panel diagnostic tests have two major purposes. The first is to provide diagnostic information that can lead to early detection of an autochanger problem. The second is to provide fault isolation tests. All the logs are maintained within non-volatile RAM, and so are not affected by cycling autochanger power.

  • Page 74: Information Logs (Info Logs)

    Table 4–2 Information Logs (INFO Logs) Log Name Description Autochanger Error The autochanger maintains a time-stamped history of past diagnostic test errors that have occurred within the autochanger. The error message maintained for each error indicates the failure and the possible Field Replaceable Units (FRUs) that may have caused the failure.
  • Page 75 Table 4–2 (Cont.) Information Logs (INFO Logs) Log Name Description Poweron Hours Displays the number of hours the unit has been powered The term Move used in Logs 6 - 10 means SCSI-level moves by the picker mechanism. Current Move Displays the number of successful moves since the most Success Count recent autochanger failure.
  • Page 76 Table 4–2 (Cont.) Information Logs (INFO Logs) Log Name Description Display Mailslot Displays total number of mailslot rotations. Rotation Count Number of Drives Displays the number of disk drives in the unit. Drive #1 SCSI Displays drive’s SCSI address. (This will always return a Address ‘‘1’’.) Drive #2 SCSI...
  • Page 77 Table 4–2 (Cont.) Information Logs (INFO Logs) Log Name Description Storage slot 8 Storage slot 9 Storage slot 10 Storage slot 11 Storage slot 12 Storage slot 13 Storage slot 14 Storage slot 15 Storage slot 16 Troubleshooting and Diagnostics 4–19...

  • Page 78: Recovery From Hardware Errors

    4.7 Recovery from Hardware Errors When a hardware failure occurs, a message is displayed on the control panel. If the failure occurs during the power-on sequence, FAIL 1 is displayed. If the failure occurs at some other time, is displayed. If a failure MISLOAD FAIL 0 occurs while you are running a test,...

  • Page 79: Recovery Procedures For Specific Hardware Errors

    Table 4–3 Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures No error No action. AUTOCHANGER CONTROLLER PCA ERRORS The first step is to make sure all cables are fully inserted into the connectors on the controller pca. ROM Checksum Error Run test 31—ROM Checksum Test –...
  • Page 80 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures SCSI Controller IC’s Run test 34—SCSI Interface Controller RAM Failed Chip Test—verify failure. SCSI Controller Run test 34—SCSI Interface Controller Message Error Chip Test—verify failure. SCSI Controller Run test 34—SCSI Interface Controller Command Error...
  • Page 81 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures SCSI Connector Run test 41—SCSI Connector Loopback Loopback Error in DB3 Test (using loopback connector 88780- or REQ 60095)—verify failure. SCSI Connector Run test 41—SCSI Connector Loopback Loopback Error in DB4 Test (using loopback connector 88780- or ACK...
  • Page 82 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures POWER SUPPLY ERRORS 33 - 34 Power Supply failed Visually check the power cables and connections. Run test 40—Power Supply Test—verify failure. DRIVE CONNECT ERRORS Drive not connected On error code 38 be sure to check: •...
  • Page 83 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures Unable to find home Run test 50—Find Home Sequence—verify position; Path-Clear failure. sensor blocked Unable to clear Path- Run test 50—Find Home Sequence—verify Clear sensors by moving failure.
  • Page 84 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures Excessive tilt of the Run test 51—Carriage/Picker Assy carriage/picker assembly Calibration—verify failure. (toward drive) Excessive cone angle on Run test 51 – Carriage/Picker Assy picker Calibration—verify failure.
  • Page 85 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures Shipping diagnostic run No FRUs failed. Shipping warning. with cartridges in drive Take all disks out of the optical drive mechanism mechanism. CALIBRATION SENSOR SYSTEM ERRORS 60 - 61 Home sensor failed Run test 51—Carriage/Picker Assy...
  • Page 86 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures Check for loose labels or other obstructions in errors B3 and B4. Also, make sure that the storage slots are not skewed. Storage slot will not Run test 15—Storage Slot Test—verify accept or release failure.
  • Page 87 Table 4–3 (Cont.) Recovery Procedures for Specific Hardware Errors Error Code (hex.) Error Recovery Procedures Unable to gain proper Run test 60—FRU Isolation Test—verify servo control of motors failure. Unable to move picker Run test 60—FRU Isolation Test—verify motor failure. Unable to move carriage Run test 60—FRU Isolation Test—verify motor...

  • Page 88: Error Information Through Scsi Commands

    4.8 Error Information Through SCSI Commands When there are errors in autochanger movements, two main approaches are available to get information and to run execiser tests. The approach usually depends on whether the error encountered was a hard error or whether it was a soft or intermittent error.

  • Page 89: Diagnostics

    Figure 4–4 Information and Tests Through the SCSI Bus When troubleshooting through the SCSI bus, refer to the following information: • Ordering information for Offline Diagnostics for Optical Library Products located in Appendix B. This offline diagnostic, DOSDASS2, can be used to access the above information through the SCSI bus.

  • Page 90: Offline Diagnostics

    These tests are run from the control panel and are divided into four groups: sequence tests, exerciser tests, electronic core tests, and mechanism core tests. These tests are fully explained in Section 4.10. Instruction for running these tests are provided in Section 4.9.2. 4.9.1 Offline Diagnostics A diagnostic utility called DOSDASS2 is available from Hewlett-Packard for accessing the optical disk library through the SCSI bus.

  • Page 91: Diagnostic Test Command Descriptions

    Procedure for running tests To display test information and to choose tests to execute, access the TEST option using the following steps. 1. With the autochanger power on and in the state, press READY TEST * NEXT displays. 2. Press displays.

  • Page 92: Sequence Tests

    4.10.1 Sequence Tests Table 4–4 Sequence Tests Test Name Description Poweron Checks all digital data paths and normal machine operation. This test runs the same sequence of TESTS as when initiated by an actual power on, but does NOT do all operations (see below).
  • Page 93 Table 4–4 (Cont.) Sequence Tests Test Name Description Controller Test This sequence is run by the autochanger controller at poweron to check out all paths, and operation of the servo motor and autochanger circuitry. Sequence Order: 30 - Processor Test 31 - ROM Checksum Test 33 - Non-Destructive RAM Test 32 - RAM Checksum Test...
  • Page 94 Table 4–5 Exerciser Tests Test Name Description Initialize Element Does the same function as the SCSI Initialize Element Status Status command. It physically scans the entire unit to determine which storage slots and drives have disks. Mechanism Makes a combination of moves with a PASS/FAIL result. Exercise Test This exerciser is a sequence of other exerciser tests—12, 13, 14, 15, 16, and 17.
  • Page 95 Table 4–5 (Cont.) Exerciser Tests Test Name Description Mailslot I/O Makes a combination of moves with a PASS/FAIL result. It moves a cartridge from the lowest-numbered full slot to the mailslot with a random flip. It then moves the cartridge back to its original slot with its original orientation.

  • Page 96: Electronic Core Tests

    4.10.2 Electronic Core Tests Table 4–6 Electronic Core Tests Test Name Description Microprocessor Does a functional check of the microprocessor. This test Operation Test must shut down the servo system; a Initialize Mechanism Test is run when this test finishes. ROM Checksum Does a checksum verification of the ROM.
  • Page 97 Table 4–6 (Cont.) Electronic Core Tests Test Name Description SCSI Connector Runs a loopback through SCSI connectors, checking Loopback Test proper operation of the SCSI drivers, receivers, and cables. (interactive) Requires an external loopback hood with terminator power. Will not run if initiated via SCSI; if so, it reports error FCH Test Did Not Run Optical Sensor Test...
  • Page 98 Table 4–6 (Cont.) Electronic Core Tests Test Name Description Calibrate Calculates a min/max clearance for a magazine. (The Magazines selected magazine should be empty.) The autochanger requires a disk in the mailslot. The test passes if clearance is 85 encoder counts (1 mm) up and down. (See info 23 for actual values.) If this test is run by SCSI command, set Byte 1 to the storage slot number.

  • Page 99: The Find Home Sequence And Information Logs

    4.11 The FIND HOME Sequence and Information Logs 4.11.1 Specific Steps of the FIND HOME Sequence The following FIND HOME sequence executes all the motions used in normal autochanger operation. Understanding the motions explained here, and the likely errors during these motions, should help you diagnose problems that may be occurring in the unit you are working on.
  • Page 100 3. Initialize the picker fingers by pulling the fingers back to a hard stop and calibrate flip mechanism. (MMID# 4D, 4F, 7, 8) a. Possible error: 45–Unable to free the picker fingers. 4. Initialize the carriage/picker position by moving it toward the drive-end of the until it hits a hard stop.
  • Page 101 Possible error #3: 60–Optical sensor failed d. Possible error #4: 50–Excessive tilt of cartridge/picker assembly (away from the drive) e. Possible error #5: 51–Excessive tilt of cartridge/picker assembly (toward the drive) 9. Filp the carriage/picker assembly with the nut facing upward if necessary (MMID# 1, 2, 7, 8) a.

  • Page 102: Micro-Move Reference Table For Viewing Find Home Sequence

    4.12 Micro-Move Reference Table for Viewing FIND HOME Sequence Table 4–7 RW504/RW524 Micro-Move ID Table Move ID (hex) Description No motion; no commands pending Carriage motion; full speed (away from drives) Carriage motion; full speed (toward the drives) Carriage motion; move fingers forward during full speed; away from the drive Carriage motion;...
  • Page 103 Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table Move ID (hex) Description Insert cartridge into drive after slider has engaged Move fingers with cartridge toward drive, determining distance of cartridge in drive. Look for drive to accept cartridge Drive failed to accept cartridge; pull cartridge back Drive accepted cartridge;...
  • Page 104 Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table Move ID (hex) Description Move fingers at full speed during test for a cartridge Positioning before and after test for a cartridge in drive Check for a cartridge in drive Move carriage to drive bang position Verify the presence of a cartridge by pressing cartridge against drive face Short carriage motion to check for cartridge sticking out of a storage slot after insertion (toward drive)
  • Page 105 Table 4–7 (Cont.) RW504/RW524 Micro-Move ID Table Move ID (hex) Description Long carriage motion during carriage/picker assembly calibration Short carriage motion during carriage/picker assembly calibration (fine measure) Error occurred while inserting cartridge, push cartridge farther into storage slot Move fingers toward storage slot during storage slot recovery Pull fingers back from storage slot during storage slot recovery Carriage motion during drive recovery Carriage motion during storage slot recovery...

  • Page 107: Removal And Replacement

    Removal and Replacement 5.1 Field-Replaceable Assemblies The RW504/RW524 optical disk library contains the following major assemblies: • Multifunction optical drive mechanism • Mailslot assembly • Power supply • Front panel assembly • Leadscrew assembly • Picker/carriage assembly • Autochanger controller 5.2 ESD Precautions The RW504/RW524 optical disk library contains very sensitive electrical components.

  • Page 108: Tools Required

    5.3 Tools Required The following tools are needed for assembly/disassembly of the autochanger: • Torx® driver with the following bits: T-10, T-15, T-25 • Dags • Needle-nosed pliers • Pozidriv® magnetized screwdriver • Flatblade screwdriver 5.4 Assembly/Disassembly Procedures WARNING Be sure to disconnect the power cord before taking the disk library apart to prevent possible electrical shock.
  • Page 109 Note A drive that has been disassembled will not be accepted as an exchange assembly. 1. Remove power from the optical disk library. Switch off both the power switch on the back panel and the operation switch on the front panel. 2.

  • Page 110: Replacing The Autochanger Controller Pca

    • When replacing the top cover, make sure the tabs on the bottom of the top cover fit into the slots on the bottom of the autochanger chassis. 5.4.2 Replacing the Autochanger Controller PCA Note The front bezel assembly can be removed and the operation switch cable disconnected if you wish, to allow more clearance for removing/replacing the controller PCA.

  • Page 111: Controller Pca Cable Connections

    Figure 5–1 Controller PCA Cable Connections 3. Remove the controller PCA from the chassis. a. Remove the eight T-15 screws that secure the PCA to the chassis (See Figure 5–2). b. Lift the side of the controller PCA that faces toward the back of the autochanger out towards you slightly, and then slide the PCA towards the rear of the autochanger until it can be removed without catching any cabling.

  • Page 112: Removing The Autochanger Controller Pca

    Figure 5–2 Removing the Autochanger Controller PCA When reassembling: • Verify that the jumper at J19 on the controller PCA is on the upper two pins. (See Figure 5–3 for correct jumper position.) • Verify that the 8 switch rocker switch (SW2) on the controller PCA is set to the positions called out in Table 5–1.

  • Page 113: Dip Switch Location On The Controller Pca

    • Refer to Section 5.4.1 to replace the access panel and top cover. Figure 5–3 Dip Switch Location on the Controller PCA Removal and Replacement 5–7...

  • Page 114: Replacing The Front Bezel Assembly

    Table 5–1 SW2 Default Settings Switch Number Position Function OPEN Clears NVRAM and security code when ‘‘CLOSED’’. OPEN Not field usable OPEN Not field usable OPEN Not field usable CLOSED Term power OPEN Term power OPEN Term power OPEN Not field usable 5.4.3 Replacing the Front Bezel Assembly Note The front bezel must be removed in order to replace the following...

  • Page 115: Front Bezel Mounting Screws

    b. Slide the tabs at the top of the panel downward until the panel is released and can be removed. CAUTION Hold on to the front bezel to prevent it from dropping and being damaged while removing the front panel mounting screws. 3.

  • Page 116: Replacing The Front Operation Switch/Cable Assembly

    Figure 5–5 Disconnecting the Mailslot Sensor Cable and Front Panel Cable 5.4.4 Replacing the Front Operation Switch/Cable Assembly 1. Pull off the operation button from the front of the disk library. 2. Remove the two pozidriv screws that secure the operation switch to the front of the disk library.
  • Page 117 5. Disconnect the power cable from the back of the drive mechanism (located at the front of the disk library). 6. Feed the power cable assembly through the opening in the sheetmetal bracket that secures the magazine guides to the chassis (near the center of the disk library).

  • Page 118: Replacing The Fan/Display/Operation Button Assemblies

    5.4.5 Replacing the Fan/Display/Operation Button Assemblies 1. Follow the service access procedure at the beginning of this chapter. 2. Remove the front bezel assembly. (See Section 5.4.3.) CAUTION Hold your hand over the front of the display while removing the screws that secure it to the front bezel.

  • Page 119: Removing The Display Assembly

    Figure 5–6 Removing the Display Assembly Note When assembling/disassembling the display assembly, place the display on an anti-static mat to prevent the display from being scratched. 4. Carefully disconnect the fan cable from the display PCA using a pair of needle-nosed pliers.

  • Page 120: Replacing The Mailslot Assembly

    8. Remove the two T-20 fan mounting screws and flat washers that secure the fan to the back side of the front bezel. Lift off the RFI shield. 9. Turn the fan counterclockwise to release the two fan tabs from the slots in the front bezel and remove the fan.

  • Page 121: Mailslot Mounting Screws

    4. Slide the mailslot forward out of the autochanger. Figure 5–7 Mailslot Mounting Screws When reassembling: • When reinserting the mailslot into the chassis, lift up on the mailslot assembly from inside the chassis to ensure the mailslot is seated properly on the guides.

  • Page 122: Replacing The Optical Drive Mechanism

    5.4.7 Replacing the Optical Drive Mechanism Note The optical drive mechanism does not automatically eject a disk from the drive if a power failure occurs. If you need to manually remove a disk from a drive with no power, you must use the eject tool. Instructions for using the eject tool are given in Section 4.4.

  • Page 123: Picker Service Position

    Figure 5–8 Picker Service Position 4. Remove the following cables from the back side of the drive mechanism (See Figure 5–9): a. Power cable b. Drive interface cable and clamp SCSI cable Removal and Replacement 5–17...

  • Page 124: Optical Drive Mechanism Cable Connections

    Figure 5–9 Optical Drive Mechanism Cable Connections 5. Disconnect the optical sensor cable from the interconnect PCA. (See Figure 5–10.) 6. Remove the two T-25 screws that are located on each side of the front of the optical drive mechanism. (See Figure 5–10.) 5–18 Removal and Replacement...

  • Page 125: Drive Mounting Screws And Optical Sensor Cable Locations

    Figure 5–10 Drive Mounting Screws and Optical Sensor Cable Locations 7. Slide the drive mechanism assembly out through the center of the disk library (see Figure 5–11). CAUTION Be careful not to catch the optical sensor cables on the drive mechanism while removing the drive.

  • Page 126: Sliding The Drive Mechanism Out Of The Library

    Figure 5–11 Sliding the Drive Mechanism Out of the Library 8. Remove the four T-10 screws that secure the drive to the drive plate (see Figure 5–12). 9. If you need to replace the optical sensor, remove the T-15 screw that secures the optical sensor to the sensor bracket (see Figure 5–12).

  • Page 127: Removing The Drive Plate And Optical Sensor

    Figure 5–12 Removing the Drive Plate and Optical Sensor When reassembling: • Make sure the drive is positioned correctly when reattaching the drive to the drive plate: Position the drive mechanism in upside down in front of you so that the front of the drive mechanism is facing toward you.

  • Page 128: Replacing The Interconnect Pca

    Verify that the drive and drive plate are properly aligned and that none of the screws are catching on the raised part of the drive plate. • The front of the drive mechanism faces towards the leadscrew assembly. • The tabs on the drive plate slide on rails at the bottom of the disk library chassis.

  • Page 129: Replacing The Picker/Carriage Assembly

    Figure 5–13 Removing the Interconnect PCA 5.4.9 Replacing the Picker/Carriage Assembly 1. Follow the service access procedure at the beginning of this chapter. 2. Lay the disk library on its side. 3. Remove the T-15 screw that secures the carriage to the leadscrew assembly. (This screw is sealed with Loctite®.) 4.

  • Page 130: Removing The Carriage/Picker Assembly

    Figure 5–14 Removing the Carriage/Picker Assembly 6. Slide the carriage shaft out of the opening in the bottom of the library chassis (see Figure 5–15). 5–24 Removal and Replacement...

  • Page 131: Removing The Carriage Shaft

    Figure 5–15 Removing the Carriage Shaft 7. Remove the picker assembly by lifting up on the side of the picker that the carriage shaft was, and then rotating the picker to a horizontal position. Carefully lift the picker assembly out of the chassis. When reassembling: •...

  • Page 132: Replacing The Leadscrew Assembly

    5.4.10 Replacing the Leadscrew Assembly 1. Follow the service access procedure at the beginning of this chapter. 2. Remove the T-15 screw that secures the leadscrew assembly to the carriage /picker assembly (see Figure 5–16). (This screw is sealed with Loctite®.) 3.

  • Page 133: Securing The Picker To The Top Of The Autochanger

    Figure 5–17 Securing the Picker to the Top of the Autochanger 5. Disconnect the power and encoder cables from the leadscrew motor using a flatblade screwdriver. Place the screwdriver between the cable connector and the plastic tab on the motor, and lift the screwdriver upward while pulling off the connector.

  • Page 134: Removing The Leadscrew Assembly

    7. Pull on the large tab on the leadscrew base to release the tabs that secure the base to the back of the autochanger. 8. Rotate the motor end of the base in toward the center of the autochanger and carefully lift the base out of the autochanger.

  • Page 135: Replacing The Power Supply

    • Refer to Section 5.4.1 to replace the access panel and top cover. Figure 5–19 Preparing the Leadscrew Assembly for Replacement 5.4.11 Replacing the Power Supply 1. Remove power from the optical disk library. Switch off both the power switch on the back panel and the operation switch on the front panel.

  • Page 136: Removing The Power Supply Assembly

    4. The power supply is hinged on the left side (when facing the back of the autochanger). Open the right side of the power supply far enough to disconnect the power cable from the power supply PCA. 5. Remove the power supply assembly by lifting up the power supply until the tabs on the power supply are released from the slots on the back panel.

  • Page 137: Replacing The Magazine Guides

    When reassembling: • Verify that the voltage switch is set correctly and that the fuseholder contains the correct fuse. • It is important that the power supply assembly is reassembled in the exact reverse order in which it was disassembled. 5.4.12 Replacing the Magazine Guides 1.

  • Page 138: Removing The Magazine Guides

    Figure 5–21 Removing the Magazine Guides When reassembling: • Make sure the tab on the back of each magazine guide fits into the slot in the front of the disk library before the guides are resecured to the storage slot. •...

  • Page 139: Replacing The Internal Ups Cable

    5.4.13 Replacing the Internal UPS Cable 1. Follow the service access procedure at the beginning of this chapter. 2. Remove the leadscrew assembly. (See Section 5.4.10.) 3. Remove the two T-10 screws that secure the UPS cable to the inside of the disk library back panel.

  • Page 140: Reinitializing The Autochanger Controller Pca Ram After Service

    5.5 Reinitializing the Autochanger Controller PCA RAM after Service All the RAM on the autochanger controller PCA is battery backed and is, therefore, non-volatile. Most of the RAM is initialized to known values at powerup. Variables that are not changed are customer configurations, autochanger logs, autochanger odometers, element status variables, and variables that help the autochanger recover from power failures.

  • Page 141: Variables Set By Configuration

    • Recovery restore variables set to to system defaults Maximum number of Find Home retries = 3 Maximum number of error recovery retries = 3 Maximum number of restore retries = 1 • Security variables Clear Unit Reserved Clear Prevent Media Removal for each SCSI ID •...

  • Page 142: Replaceable Parts

    5.6 Replaceable Parts 5.6.1 Recommended Service Kit The initial recommended service kit for the optical disk library includes the exchange parts list and the non-exchange parts list for stocking atlogistics. Refer to Figure 5–22, Figure 5–23, and Figure 5–24 for exploded views of optical disk library with FRU numbers.

  • Page 143: Non-Exchange Assemblies

    Table 5–2 (Cont.) Exchange Assemblies HP Part FRU No. Number Description Digital Part Number 25,27,40 C1708-60x40 Carriage/Picker Assembly 29-30860-01 These FRUs have been combined into a single replaceable part. If any one of the listed FRU numbers needs to be replaced, reorder the part number for the entire assembly. Table 5–3 Non-exchange Assemblies HP Part FRU No.
  • Page 144 Table 5–3 (Cont.) Non-exchange Assemblies HP Part FRU No. Number Description Digital Part Number C1708-60x59 SCSI I/O Cable Loop † C1708-60x65 Front Panel Cable † C1708-60x66 Interconnect/Controller Cbl † C1708-60x75 RFI Shield † C1708-60x76 Key Pads (dove gray) † C1718-60x76 Key Pads (black) †...

  • Page 145: Optical Disk Library Exploded View (Sheet 1 Of 3)

    Figure 5–22 Optical Disk Library Exploded View (Sheet 1 of 3) Removal and Replacement 5–39...

  • Page 146: Optical Disk Library Exploded View (Sheet 2 Of 3)

    Figure 5–23 Optical Disk Library Exploded View (Sheet 2 of 3) 5–40 Removal and Replacement...

  • Page 147: Optical Disk Library Exploded View (Sheet 3 Of 3)

    Figure 5–24 Optical Disk Library Exploded View (Sheet 3 of 3) Removal and Replacement 5–41...

  • Page 149: Theory Of Operation

    Theory of Operation This chapter discusses the following aspects of the RW504/RW524 optical disk library: • Autochanger Command execution Mechanics • Autochanger controller PCA • Power supply • Optical disk drive In addition, autochanger error detection, diagnostic strategy, and the SCSI interface and command set are discussed.

  • Page 150: Scsi Command Translation For Autochanger Operation

    Figure 6–1 SCSI Command Translation for Autochanger Operation Micro−move Macro−move Micro−move Profile Micro−move Profile Micro−move SCSI Command Macro−move Micro−move Micro−move Profile Micro−move Profile Macro−move Micro−move Mechanism Micro−move Code Examples of high-level commands are: • Move/Exchange—move a cartridge from element A to element B. •...
  • Page 151 2. Move the picker to the front of the storage element. 3. Get the cartridge from the storage element. 4. Do a flip. 5. Move the picker to the front of the disk insertion slot on the drive element. 6. Put the cartridge into the drive element. The basic autochanger functions (macro-moves) are then divided into a series of smaller movements called ‘‘micro-moves.’’...

  • Page 152: Mechanics

    determines the type of error recovery scheme to employ. This tailored technique provides gentle, stable control of the mechanism, resulting in increased reliability. 6.1.2 Mechanics The mechanics consist of the following major assemblies: • Leadscrew assembly • Picker/carriage assembly • Mailslot (disk loading and ejecting assembly) The picker/carriage assembly is the heart of the mechanism.

  • Page 153: Autochanger Controller Pca Block Diagram

    • Multifunction Peripheral Chip Figure 6–2 Autochanger Controller PCA Block Diagram The MICROPROCESSOR is a Motorola 68000 running at 12 MHz. This microprocessor controls all processes on the controller PCA such as servos, SCSI interface, and commands to the control panel. Associated with the microprocessor is clocking circuitry, battery-backed-up RAM, decoding logic, and ROM.
  • Page 154 ROM. The controller firmware resides in two FLASH ROMs. These FLASH ROMs allow new firmware versions to be downloaded into ROM in the field. RAM. The two RAM chips are special, low-power CMOS static RAMs. A standby battery on the PCA takes over powering these chips if main power is lost. The chips remain in standby mode, providing a nonvolatile memory storage capability when the unit is powered off.

  • Page 155: The Power Supply

    6.3 The Power Supply The power supply is a switching supply that provides +5V at 5.6 amperes, +12V at 0.5 amperes, +12V at 2.7 amperes, and -12V at 0.6 amperes. The supply also provides the drive power-on reset signal. The AC line voltage is connected to the power supply through a line cord receptacle mounted on the power supply PCA.

  • Page 156: The Multifunction Optical Drive And Drive Controller

    6.4 The Multifunction Optical Drive and Drive Controller There are four major subassemblies within the optical drive: the controller PCA, servo PCA, loader mechanism, and the optical head (Figure 6–3). Figure 6–3 Functional Diagram 6.4.1 Controller PCA The controller PCA is a microprocessor-based collection of digital electronics that handles functions performed by a SCSI controller, a data buffer, and a formatter /sequencer.

  • Page 157: Scsi Controller

    6.4.1.1 SCSI Controller The SCSI controller provides the SCSI interface connection to the host computer. This interface consists of both the electrical signals and the firmware which decodes the various commands and messages on the SCSI bus and instructs the drive to take appropriate action.

  • Page 158: Read And Write Channel Electronics

    6.4.2.2 Read and Write Channel Electronics Read channel electronics take analog data from the optical head and convert it into digital ‘‘transitions.’’ These transitions are decoded by the decoder electronics on the controller PCA in order to extract data from format and error correction features.

  • Page 159: Optical Disk Layout-650-Mbyte Capacity

    supports the ECMA 184 standard for 1.3-Gbyte capacity, both rewritable and write-once. The following sections outline disk layout for both 650-Mbyte and 1.3-Gbyte optical disks. Throughout this section, the sector number is that of a 1024 bytes/sector disk. The value of a 512-bytes/sector disk is written inside parentheses just after the value for the 1024 bytes/sector disk.

  • Page 160: Optical Disk Layout

    Figure 6–4 Optical Disk Layout 3. User Area that consists of: g User Groups, of n sectors each g Spare Groups, of m sectors each 6–12 Theory of Operation...

  • Page 161: User Zone Layout For 650-Mbyte Media

    Figure 6–5 User Zone Layout for 650-Mbyte Media Track 0 PDL and SDL 1 DDS1 DMAs 1 and 2 DDS2 PDL and SDL 2 1 Sector Reserved User Group 0 (n Sectors) Spare Group 0 (m Sectors) User Area User Group g−1 (n Sectors) Spare Group g−1 (m Sectors) Slipping Area (2048 Sectors)

  • Page 162: Optical Disk Layout-1.3-Gbyte Capacity

    6.5.3 Optical Disk Layout—1.3-Gbyte Capacity This section highlights some of the aspects of 1.3-Gbyte Capacity optical disks as outlined by ECMA 184. The disk is divided into various zones, similar to the 650-Mbyte capacity. See Figure 6–4. In addition to the User Zone, where user data is stored, there are other zones including the PEP and SFP zones.

  • Page 163: User Zone Layout For 1.3-Gbyte Media

    groups BEFORE accounting for slip spares. (Please refer to Section 6.5.5 for more details. Figure 6–6 User Zone Layout for 1.3-Gbyte Media, g=1 Track 0 DDS 1 DMAs PDL and SDL 1 1 and 2 DDS 2 PDL and SDL 2 1 Sector Track 3 Reserved...

  • Page 164: User Zone Layout For 1.3-Gbyte

    Figure 6–7 User Zone Layout for 1.3-Gbyte,g=16 Track 0 DDS 1 PDL and SDL 1 Track 1 DDS 2 Track 2 PDL and SDL 2 Track 3 Data Group 0 (n0 Sectors) Spare Group 0 Track 1599 (m0 Sectors) Track 1600 Data Group 1 (n1 Sectors) Spare Group 1...

  • Page 165: Values For N And M For 1.3-Gbyte With G=16 (1024 Media)

    Table 6–1 shows the values for n and m for 1.3-Gbyte with g=16 (1024 media). Table 6–1 Values for n and m for 1.3-Gbyte with g=16 (1024 media) Band Data Band 0 27064 Data Band 1 28815 Data Band 2 30498 Data Band 3 32198...

  • Page 166: Drive Defect Management

    Table 6–2 (Cont.) Physical Revolution to Logical Track Layout Zone or Band Physical Revolution Range Logical Track Range Data Band 2 (2700,4049) (3300,5099) Data Band 3 (4050,5399) (5100,6999) Data Band 4 (5400,6749) (7000,8999) Data Band 5 (6750,8099) (9000,11099) Data Band 6 (8100,9449) (11100,13299) Data Band 7...
  • Page 167 The DDS contains information on how the disk is organized into user and spare groups. There are three important parameters; the variables g, n, and m are used in the ISO standard, and are here for consistency: • g - number of groups •...

  • Page 168: Slip Sparing Algorithm

    6.5.6 Slip Sparing Algorithm The slip sparing algorithm maps logical blocks to physical blocks to avoid defective sectors found during a certification process. The list of defective sectors is maintained in the Primary Defect List (PDL). During an address translation, the logical blocks are ‘‘slipped’’...

  • Page 169: Error Thresholds

    During normal address translation, after the original physical address is found via the slip sparing algorithm, the SDL is checked to see if that physical address was ’spared’ through the replacement sparing algorithm. If so, the replacement physical address is substituted for the original physical address. In the event a sector needs to be replaced, i.e.

  • Page 170: Error Detection And Recovery

    Table 6–3 Error Thresholds Operation Sector IDs ECC Level Format Write Erase Verify Read (Recovered) Read 6.6 Error Detection and Recovery Refer to Figure 6–8 during the discussion in the next two sections. Figure 6–8 Error Detection and Recovery 6–22 Theory of Operation...

  • Page 171: Error Detection

    6.6.1 Error Detection The autochanger error detection methods are extensive. Both processes and sensors detect errors. Each of the processes that detect errors are interrelated. Depending on the error condition, the autochanger expects feedback from one or more of the following processes before a diagnosis is made: •...

  • Page 172: Error Recovery Processes

    which side of the picker faces the mailslot-end of the chassis and allow calibration of the picker’s position in relation to the drive and storage slots. 6.6.2 Error Recovery Processes The autochanger uses the following processes to recover from errors: •...

  • Page 173: Move Errors

    • Various bus-level communication errors In all of these cases, the command is rejected immediately and the autochanger is not moved. 6.6.4 Move Errors If an error is detected during an autochanger motion, the state of the machine is recorded in internal memory and a retry procedure is called. Errors of this type may be either physical or logical, and may be recoverable or unrec overable.

  • Page 174: Hardware Error Codes

    6.6.5 Hardware Error Codes If an error is unrecoverable (i.e., something is broken or jammed to a point that manual intervention is required), the autochanger takes an additional step in an attempt to identify the Field Replaceable Unit (FRU) that is causing the failure. A routine is called automatically that performs a process of elimination for various FRUs.

  • Page 175: The Scsi Interface

    Drive Log This data indicates the number of times the autochanger uses the drive. Runtime Log An entry is put into this log each time an error occurs that requires any form of recovery. Both ‘‘on-the-fly’’ and extensive recovery methods are logged. The type of error, the method of recovery, and the number of moves to that point are recorded.

  • Page 176: Group 0 Commands (6-Byte Command)

    obtained by writing to: Global Engineering Documents, 2805 McGaw, Irvine, CA 92714, or call: (800) 854-7179 or (714) 261-1455. Refer to document X3.131-SCSI-2. • Multifunction Optical Drive and Library SCSI-2 Command Reference. This document can be obtained by ordering part number 5960- 7606 from the Sales Response Center at Hewlett-Packard.

  • Page 177: Group 1 And 2 Commands (10-Byte Command)

    Table 6–4 (Cont.) Group 0 Commands (6-byte command) Code (Hex.) Name Description Release Releases a specified logical unit from the reservation state Mode Sense Reads optical disk, drive unit, or controller unit parameters Start/Stop Unit Starts or stops rotating the optical disk, ejects the optical disk from the drive unit, or both Receive Diagnostic Requests analysis data be sent to the initiator...

  • Page 178: Group 5 Commands (12-Byte Command)

    Table 6–5 (Cont.) Group 1 and 2 Commands (10-byte command) Code (Hex.) Name Description Synchronize Cache Initiates the writing of all cached write data to the optical disk Read Defect Data Reads the optical disk defect information Write Buffer Writes data to the controller data buffer Read Buffer Reads data from the controller data buffer Read Long...

  • Page 179: A Offline Diagnostic Information

    Offline Diagnostic Information A.1 System Error Report Figure A–1 shows a typical VAX/VMS system error report. After analyzing the report for symptoms, proceed to Section A.2. Offline Diagnostic Information A–1...

  • Page 180: System Error Report

    Figure A–1 System Error Report V A X / V M S SYSTEM ERROR REPORT COMPILED 8−APR−1993 15:11:43 PAGE ******************************* ENTRY 9. ******************************* ERROR SEQUENCE 6552. LOGGED ON: SID 0A000005 DATE/TIME 8−APR−1993 15:10:09.37 SYS_TYPE 04010102 SYSTEM UPTIME: 5 DAYS 21:14:31 SCS NODE: KAWA VAX/VMS V5.4−2 SCSI Command Code...

  • Page 181: Autochanger Error Codes

    A.2 Autochanger Error Codes This section contains the following autochanger error code tables: Request Sense Codes Request Sense Maps Move Error Codes Micro-Move Failure Type Codes Figure A–2 Jukebox Request Sense Data Parameter Block Format Byte Valid Error Code (70h or 71h) Reserved (0) Reserved (0) Sense Key *...

  • Page 182: Sense Key And Additional Sense Length Values

    Table A–1 Sense Key and Additional Sense Length Values Sense Additional Sense (hex) Description Length No Sense—Normal conditions Recovered Error—Usually everything is OK Not Ready—Typically a disk isn’t spun up or inserted Medium Error—May or may not be a serious problem Hardware Error—Usually a serious problem Illegal Request—Usually a software problem Unit Attention—Power on, RESET, a disk inserted, etc.

  • Page 183: Jukebox Request Sense-Additional Sense Data

    Figure A–3 Jukebox Request Sense—Additional Sense Data Byte Move Error Code * Hardware Error Code (See list of Hardware Errors in Service Manual) First FRU (See list of FRUs in Service Manual) Second FRU Third FRU Rsvd MvCap Last PosLost Cartin Reserved (0) 24−25...
  • Page 184 Jukebox Request Sense − Additional Sense Data (continued) Byte Valid ErrEn Cartin CartEl UnexpMt UnexpF Cartinv ElRty 39−40 Destination Element Number Valid ErrEn Cartin CartEl UnexpMt UnexpF Cartinv ElRty 42−43 Secondary Source Element Number Valid ErrEn Cartin CartEl UnexpMt UnexpF Cartinv ElRty 45−46 Second Destination Element Number...
  • Page 185 Move Error Code— The movement that was being performed when the error occured. The values of the Move Error Codes are in Table A–2. Hardware Error Code – Determined by fault isolation, this error code indicates the cause of the failure. Hardware error codes are listed in the ‘‘Troubleshooting and Diagnostics’’...
  • Page 186 BFHm—A Bad Find Home bit of 1 indicates the Find Home algorithm was started while the optical sensors were inoperable. (For byte 26, this attempt refers to Retry algorithm and for byte 30 it refers to Recovery algorithm). FHR—A Find Home Recalibration bit of 1 Find Home algorithm was invoked to recalibrate the mechanism (For byte 26, this attempt refers to Retry algorithm and for byte 30 it refers to Recovery algorithm).

  • Page 187: Autochanger Move Errors

    Micro-Move Error Code—The error code associated with the failed Micro-Move ID. See Table A–3. Vertical Motor Commanded Position—The position to which the carriage motor was commanded. Vertical Motor Actual Position—The actual position of the carriage motor. Horizontal Motor Commanded Position—The position to which the picker motor was commanded.
  • Page 188 Table A–2 (Cont.) Autochanger Move Errors Error Codes Failure Description Failure while moving the picker fingers back after inserting a cartridge into the drive (destination). Failure while moving the picker fingers forward to engage the cartridge in the mailslot (source). Failure while moving the picker fingers back to remove the cartridge from the mailslot (source).

  • Page 189: Autochanger Micro-Move Error Codes

    Table A–3 Autochanger Micro-Move Error Codes Error Code (hex) Description Micro-Move Errors are reported in byte 56 of the additional sense bytes (Figure A–3). No error. Carriage motor drive voltage exceeded limit set by firmware. Carriage motor overcurrent detected by hardware. Carriage motor force exceeded limit set by firmware.
  • Page 190 Table A–3 (Cont.) Autochanger Micro-Move Error Codes Error Code (hex) Description Failed to see height sensor re-open after closing at the start of a translate. The translate distance was too long. The translate distance was too short. Failed while checking for cartridge in a drive. Failed to find a hard stop returning cartridge to storage after testing for presence of cartridge.

  • Page 191: Drive Scsi-2 Reference

    Table A–3 (Cont.) Autochanger Micro-Move Error Codes Error Code (hex) Description Could not verify that the drive ejected the cartridge. Could not free fingers from the drive. No cartridge in drive. No load complete. Drive error signal. Unexpected cartridge in the drive. Unexpected load complete.

  • Page 192: Drive Request Sense Data Parameter Format

    Figure A–4 Drive Request Sense Data Parameter Format Byte Error Code (70H or 71H) Reserved (0) Reserved (0) Rsvd (0) Sense Key* Information (MSByte) Information Information Information (LSByte) Additional Sense Length (0AH) Command Specific Information (MSByte) (reassign blocks only) Command Specific Information (reassign blocks only) Command Specific Information (reassign blocks only) Command Specific Information (LSByte) (reassign blocks only) Additional Sense Code**...
  • Page 193 These asterisks are keyed to Figure A–4: * = See Table A–1 ** = See Table A–4 *** = See Table A–5 AV– A Valid bit of 1 indicates the information field contains valid information. A Valid bit of 0 indicates that the information field does not contain valid data. ILI–...

  • Page 194: Drive Request Sense - Additional Sense Code Values

    Table A–4 Drive Request Sense - Additional Sense Code Values Sense Code and Qualifier Sense (hex) Description (Bytes 12 and 13) 00 00 0H - NS No Additional Sense Information 02 00 4H - HE No ESDI Command Complete 04 01 2H - NR LUN in Process of Becoming Ready 04 02...
  • Page 195 Table A–4 (Cont.) Drive Request Sense - Additional Sense Code Values Sense Code and Qualifier Sense (hex) Description (Bytes 12 and 13) 18 01 1H - RE Recovered Data With ECC/Retries 18 02 1H - RE Recovered Data With ECC/Retries, Data Auto Reallocated 19 01 3H - ME Defect List Not Available...
  • Page 196 Table A–4 (Cont.) Drive Request Sense - Additional Sense Code Values Sense Code and Qualifier Sense (hex) Description (Bytes 12 and 13) 3A 00 2H - NR Medium Not Present 3D 00 5H - IR Invalid Bits in Identify Message 3F 01 6H - UA Microcode Has Been Changed...

  • Page 197: Hp-Specific Drive Error Codes

    Table A–5 HP-Specific Drive Error Codes Error Code (hex) Message 0201 No seek complete 0202 No reference position found 0203 Tracking servo failed 0204 Focus servo failed 0205 Spindle servo failed 0206 Mechanical position error 0207 Load unload failed 0208 DSP download failed 0209 DSP import x failed...
  • Page 198 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 0225 ID CRC OR ECC error 0226 Data resync error 0227 Address mark error 0228 Sync mark error 0229 Incompatible format 022A Active sector ENDEC unexpected 022B Active sector higain with syncdet error 022C Active sector syncmark dubbed error 022D...
  • Page 199 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 02FF DM abort transaction 2001 DSP recovery 2002 DSP error 2003 DSP fault 2004 DSP warning 2011 Active sector DSP recovery 2012 Active sector DSP error 2013 Active sector DSP fault 2014 Active sector DSP warning 2021...
  • Page 200 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 4102 Data CRC failure 4103 ECC errors in interleave threshold exceeded 4401 DDS sector not found 4402 DDS reserved field not zero 4403 PDL reserved field not zero 4404 SDL reserved field not zero 4405 DDS ID field invalid...
  • Page 201 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 441A DMA length too short for PDL to exist 441B DMA length too short for SDL to exist 441C No spare remaining 441D Number of SDLs greater than total spares allocated 441E DDS ID invalid for CCW media 441F...
  • Page 202 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 4435 Reassign blocks, can’t move data on CCW 4436 No defect maps found 4437 PDL duplicate entry found 4438 SDL duplicate entry found 4439 SFP not found 443A SFP format field invalid 443B SFP modulation field invalid 443C...
  • Page 203 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message 4450 Sparing, empty sector following spare attempt 4451 Sparing, overwritten sector following spare attempt 4452 DMA 1 write failed 4453 DMA 2 write failed 4454 DMA 3 write failed Be aware that error codes printed in boldface type are unique to a 1.3-Gbyte, Multifunction Drive.
  • Page 204 Table A–5 (Cont.) HP-Specific Drive Error Codes Error Code (hex) Message C000 Invalid diagnostic test C001 Register error C002 RAM test error C003 Checksum error C004 CPU test error C005 Forced test error C006 NVRAM test error C007 Microprocessor test error C008 Microprocessor ROM test error C009...

  • Page 205: Offline Diagnostics

    A.4 Offline Diagnostics A diagnostic utility called DOSDASS2 is available from Hewlett-Packard for accessing the optical disk library through the SCSI bus. DOSDASS2 fully exercises either standalone multifunction optical drives or autochangers that contain multifunction optical drives. Information for getting and using DOSDASS2 is found in Appendix B.

  • Page 207: B Basic Supplies And Reorderable Parts

    Basic Supplies and Reorderable Parts B.1 Basic Supplies and Reorderable Parts While no special tools are required to service the optical library, there are some commonly used items that may be stocked and available as an area resource. Item HP Part Number Digital Part Number Rewritable Optical Disk Cartridges RWX1K-01 (30-38754-01)
  • Page 208 Item HP Part Number Digital Part Number Differential SCSI terminator‡ A1658-62024 115 V replacement fuse 3A 250 V‡ 2110-0003 230 V replacement fuse 3A 250 V‡ 2110-0780 Eject tool‡ C1708-88803 Optical disk cleaning kit‡ C1700-88800 Optical disk cleaner accessory kit (extra C1700-88801 swabs and alcohol)‡...
  • Page 209 The Instruction Manual for the Offline PC based diagnostics, DOSDASS2, can also be ordered from the Hewlett-Packard SMO facility in California. The title of this manual is Offline Diagnostics for Hewlett-Packard Optical Products and the part number is 5960-7626. Extra copies may be available from Digital’s Storage External Products Continuation Engineering Group in Shrewsbury (SHR), MA.

  • Page 211: C Connecting Multiple Optical Libraries

    Connecting Multiple Optical Libraries If the back panel of your host computer is configured with more than one SCSI port, you can attach an Optical Library to each port. See Section C.1 for directions. You can also connect two Optical Library units to a single SCSI port on your host computer by daisy-chaining the units together;...

  • Page 212: Connecting Two Optical Library Units To One Scsi Port

    Plug the 50-pin Honda connector of the SCSI cable from the first Optical Library unit into the lowest-numbered SCSI port on the host computer back panel. Then, plug the 50-pin Honda connector of the SCSI cable from the second Optical Library unit into the next-lowest-numbered SCSI port on the host computer back panel.

  • Page 213: Resetting Controller And Drive Scsi Addresses

    2. Remove the terminator from the second SCSI port on the back panel of the first Optical Library if a terminator is in place. Plug the terminator into the second SCSI port of the second Optical Library. The second SCSI port is the port furthest from the Drive Address Select Switches.
  • Page 214 4. Press until displays. SCSI IDs * NEXT 5. Press AC ID # displays where # may be the default number or the ENTER current address. This is the Autochanger controller address. If you want to change this address press , otherwise continue to press until the drive ENTER...

  • Page 215: Index

    Index Connecting an Uninterruptible Power Supply, 2–10 Connecting Multiple Optical Libraries, AEC, A–3 C–1 Assembly/Disassembly Procedures, 5–2 Connecting Two Optical Library Units to Autochanger Configuration Choices, 3–12 One SCSI Port, C–2 Autochanger Controller PCA RAM, 5–34 Connecting Two Optical Library Units to Reinitializing the Autochanger Two SCSI Ports, C–1 Controller PCA RAM, 5–34...
  • Page 216 Drive SCSI-2 Reference, A–13 Hardware Error Codes, 6–26 Hardware Error Codes and Recovery Electronic Core Tests, 4–38 Procedures, 4–20 Environmental Requirements, 2–1 Hardware Errors, 4–20 Clearance Requirements, 2–1 Error Codes, 4–20 Operating Temperature, 2–1 Recovery Procedures, 4–20 Error Detection, 6–23 Hardware Verification, 2–11 Error Detection and Recovery, 6–22 Host Configuration, 3–11...
  • Page 217 Recovery from Hardware Errors, 4–20 Reinitializing the Autochanger Controller PCA RAM, 5–34 Offline Diagnostic Information, A–1 Removal and Replacement, 5–1, 5–8 System Error Report, A–1 Replacing the Autochanger Controller, Offline Diagnostics, 4–32, A–27 5–4 Operation Information, 4–2 Replacing the Fan/Display/Operation Optical Disk Cleaning, 4–7 Button Assemblies, 5–12 Optical Disk Layout...
  • Page 218 Replacing the Optical Drive Mechanism, 5–16 Replacing the Picker/Carriage Assembly, The Autochanger, 6–1 5–23 Mechanics, 6–4 Replacing the Power Supply, 5–29 Movements, 6–1 Replacing the SCSI Cable, 5–33 The Autochanger Controller PCA, 6–4 Resetting Controller and Drive SCSI The Power Supply, 6–7 Addresses, C–3 Theory of Operation, 6–1 Restricting Disk Insertion and Removal,...
  • Page 219 Voltage Configuration, 2–10 Index–5...

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