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Digital Equipment EK–SFXXS–SG–003 Service Manual

Decarray
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DECarray Service Guide
EK–SFXXS–SG–003
Digital Equipment Corporation

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Summary of Contents for Digital Equipment EK–SFXXS–SG–003

  • Page 1 DECarray Service Guide EK–SFXXS–SG–003 Digital Equipment Corporation...
  • Page 2 Third Edition, June 1993 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.

  • Page 3: Table Of Contents

    Contents About This Guide Introduction DECarray Overview ....... . 1–1 Storage Enclosure Overview .
  • Page 4 iv Contents Troubleshooting Subsystem Fault Verification ......3–2 Fault Isolation ........3–2 3.2.1 Troubleshooting the DECarray .
  • Page 5 Contents v Postrepair Checkout and Power-Up ....5–41 5.9.1 From the Rear of the Storage Array ....5–41 5.9.2 From the Front of the Storage Array .
  • Page 6 vi Contents DECarray Cabling Information Single-System Configurations for DECarray with SF7x Enclosures ........B–1 DSSI VAXcluster Configurations .
  • Page 7 Contents vii 2–3 SF3x Operator Control Panel ......2–8 2–4 Rear Panel of the Storage Enclosure (with cover removed) . . 2–12 2–5 SF7x Operator Control Panel .
  • Page 8 viii Contents Tables 1–1 DECarray Storage Positions ......1–2 1–2 DECarray Specifications ......1–4 1–3 SF3x Storage Enclosure Specifications .

  • Page 9: About This Guide

    About This Guide This guide provides information and procedures for servicing the SF7x series storage enclosures in DECarray cabinets. Chapter 1, Introduction, contains a product description and specifications for the SF7x series storage enclosures and the DECarray cabinets. Chapter 2, Theory of Operation, describes the normal operation of the SF7x series storage enclosures and the DECarray cabinets.

  • Page 11: Introduction

    Introduction This chapter provides an overview of the DECarray, and the SF3x and SF7x series storage enclosures. 1.1 DECarray Overview The DECarray is a storage rack cabinet designed to hold up to six SF- series storage enclosures and one or two magazine tape ISEs. The DECarray is intended to be installed on one or both sides of a system.

  • Page 12: Decarray Storage Positions

    1–2 Introduction Viewing the DECarray from the front, note that the SF-series storage enclosures and magazine tape ISEs are arranged in the DECarray cabinet as follows (Figure 1–1): • The DECarray has four levels, each with two storage enclosure positions. The levels are numbered from the bottom up. Viewing from the front, odd-numbered positions are on the left, and even-numbered positions are on the right.

  • Page 13: Front View Of The Decarray

    Introduction 1–3 Figure 1–1 Front View of the DECarray L E V E L 4 L E V E L 3 L E V E L 2 L E V E L 1 S H R - X 1 1 0 1 A _ 9 1 - D G...

  • Page 14: Decarray Specifications

    1–4 Introduction Table 1–2 DECarray Specifications Characteristic Specification Dimensions (nominal) 152.4 cm (60.5 inches) H, 60.96 cm (24.0 inches) W, 76.2 cm (34.0 inches) D Weight Minimum configuration 228 kg (500 lb) Maximum configuration 454 kg (1000 lb) Agency compliance FCC, UL, IEC, CSA, and VDE Temperature +10°C to +40°C (+50°F to +104°F).
  • Page 15 Introduction 1–5 Table 1–2 (Continued) DECarray Specifications Characteristic Specification Recommended Environmental Limits Nominal airflow through enclosure 360 to 520 cubic feet/minute Input power requirements, 7.2 A (per phase) @ 100 to 120 Vac (60 with SF35 (47 to 63 Hz normal Hz), 3.7 A (per phase) @ 220 to 240 Vac operation) (50 Hz)

  • Page 16: Storage Enclosure Overview

    1–6 Introduction 1.2 Storage Enclosure Overview The SF-series storage enclosures are available in two series; the SF3x enclosure, which contains up to twelve half-height, 3 1/2-inch ISEs, and the SF7x enclosure which contains up to four full-height, 5 1/4-inch ISEs. Each disk ISE within an SF-series enclosure is independently controlled from the OCP on the front of the enclosure.

  • Page 17: Sf3X Series Storage Enclosure

    Introduction 1–7 Figure 1–2 SF3x Series Storage Enclosure r i t M A - 0 4 3 2 - 9 2 . D G...

  • Page 18: Sf7X Series Storage Enclosure

    1–8 Introduction Figure 1–3 SF7x Series Storage Enclosure SHR_X1123C_89...

  • Page 19: Sf3X Storage Enclosure Specifications

    Introduction 1–9 Table 1–3 SF3x Storage Enclosure Specifications SF35 SF36 Characteristic Specification Specification Formatted storage capacity SF3x–BK 1.7 GB 3.9 GB SF3x–HK 5.1 GB 9.6 GB SF3x–JK 10.2 GB 19.2 GB Dimensions H = 26.7 cm (10.5 inches) Same as SF35 W = 22.2 cm (8.75 inches) D = 71.1 cm (28 inches) Weight...
  • Page 20 1–10 Introduction Table 1–3 (Continued) SF3x Storage Enclosure Specifications SF35 SF36 Characteristic Specification Specification Recommended Environmental Limits Relative humidity 40% to 60% (noncondensing) Same as SF35 with a step change of 10% or less (noncondensing) Altitude Up to 2400 meters (8000 feet) Same as SF35 Air quality Not to exceed 500,000 particles...

  • Page 21: Sf7X Storage Enclosure Specifications

    Introduction 1–11 Table 1–4 SF7x Storage Enclosure Specifications Characteristic Specification Number of disk ISE positions 4 (RF series disk ISEs) Formatted storage capacity SF72–HK 2 GB SF72–JK 4 GB SF73–HK 4 GB SF73–JK 8 GB SF74–AE 3.5 GB SF74–JE 14 GB Dimensions H = 26.7 cm (10.5 inches) W = 22.2 cm (8.75 inches)
  • Page 22 1–12 Introduction Table 1–4 (Continued) SF7x Storage Enclosure Specifications Characteristic Specification Recommended Environmental Limits Temperature 18°C to 24°C (64.4°F to 75.2°F) with an average rate of change of 3°C/hour maximum and a step change of 3°C or less Relative humidity 40% to 60% (noncondensing) with a step change of 10% or less (noncondensing) Altitude...

  • Page 23: Related Documentation

    Introduction 1–13 Table 1–4 (Continued) SF7x Storage Enclosure Specifications Characteristic Specification Recommended Environmental Limits SF74 Power requirements during 4.8 A @ 100 to 120 Vac (60 Hz), disk ISE spinup 2.9 A @ 220 to 240 Vac (50 Hz) These limits are for optimum equipment performance and reliability. 1.3 Related Documentation Table 1–5 lists reference documentation that supplements this guide.

  • Page 25: Theory Of Operation

    Theory of Operation This chapter describes the normal operation of the storage enclosures and the DECarray. General descriptions of normal operations are presented so the service person has a frame of reference to compare the customer complaint to a possible service problem. This chapter also provides guidelines that you should follow when servicing the storage enclosures and the DECarray.

  • Page 26: Sf3X Series Storage Enclosure

    2–2 Theory of Operation 2.2 SF3x Series Storage Enclosure The SF3x storage enclosure exists with either two, six, or twelve half- height, 3-1/2 inch disk ISEs. The ISEs are arranged on two DSSI buses; one for up to six ISEs in the front of the enclosure and one for up to six ISEs in the rear of the enclosure.

  • Page 27: Dssi Node Id Switch Settings For Sf3X Storage Enclosure

    Theory of Operation 2–3 Table 2–2 DSSI Node ID Switch Settings for SF3x Storage Enclosure Slot Front Rear DSSI Switch Positions Position Switch Switch Node ID 1 2 3 4 X 1 0 0 X 0 0 0 X 1 1 0 X 0 1 0 X 1 0 1 X 0 0 1...
  • Page 28 2–4 Theory of Operation Table 2–2 (Continued) DSSI Node ID Switch Settings for SF3x Storage Enclosure Slot Front Rear DSSI Switch Positions Position Switch Switch Node ID 1 2 3 4 X 1 0 1 X 0 0 1 X 1 1 1 X 0 1 1 X 1 0 0 X 0 0 0...

  • Page 29: Sf3X Dssi Node Id Switches

    Theory of Operation 2–5 Figure 2–1 SF3x DSSI Node ID Switches S l o t C S l o t A S l o t F S l o t E S l o t D S l o t B R e a r R e a r R e a r...

  • Page 30: Sf3X Operating Modes

    2–6 Theory of Operation 2.2.2 SF3x Operating Modes SF3x series storage enclosures can operate in either through-bus or split-bus mode. These modes are described in the following sections. 2.2.2.1 Through-Bus Mode In through-bus mode, all six disk ISEs in each half of the storage enclosure are connected to the same DSSI bus.

  • Page 31: Operator Control Panel (Ocp)

    Theory of Operation 2–7 Figure 2–2 Front View of the SF3x Storage Enclosure (with cover removed) Front Rear OPERATOR A B C D E F A B C D E F CONTROL PANEL Front Rear DC POWER A B C D E F A B C D E F SWITCHES MA 0434 92.GRA...
  • Page 32 2–8 Theory of Operation 2.2.3.1 Operator Control Panel (OCP) The OCP (Figure 2–3) contains two identical sets of controls and indicators, one set for the front ISEs and one set for the rear. Each set consists of switches and LEDs for six ISEs, one for each slot in that side of the storage enclosure.

  • Page 33: Operator Control Panel Functions

    Theory of Operation 2–9 Table 2–3 summarizes the function of the controls and indicators provided for each ISE in the storage enclosure. Table 2–3 Operator Control Panel Functions Control/Indicator Function Ready switch The Ready switch is a push-to-set switch with a green indicator. When pressed in, the Ready switch causes the disk ISE to come on-line.
  • Page 34 2–10 Theory of Operation 2.2.3.2 DC Power Switches Power switches for each ISE are on the lower front side of the storage enclosure. The six switches on the left are for the front six ISEs and the six switches on the right are for the rear six ISEs. Each power switch is associated with a disk ISE position, as shown in Figure 2–2.

  • Page 35: Rear Panel Controls And Indicators

    Theory of Operation 2–11 2.2.4 Rear Panel Controls and Indicators Figure 2–4 shows the rear panel of the storage enclosure. The DSSI connectors are on the top rear side of the enclosure. The ac power switch, line voltage selector switch, and power supply fault indicator are on the bottom rear of the enclosure, on the power supply chassis, as shown in Figure 2–4.

  • Page 36: Rear Panel Of The Storage Enclosure (With Cover Removed)

    2–12 Theory of Operation Figure 2–4 Rear Panel of the Storage Enclosure (with cover removed) DSSI Connectors Power Supply Fault Indicator (Behind Panel) FAULT Line Voltage AC Receptacle AC Power Selected Switch Switch (Behind Panel) MA 0430 92.GRA...
  • Page 37 Theory of Operation 2–13 WARNING Hazardous voltages are present inside the equipment cabinet and the storage enclosure. Installation and service must be performed only by qualified Digital Services engineers. The ac power switch for the storage enclosure is in the center of the rear panel.

  • Page 38: Sf7X Series Storage Enclosure

    2–14 Theory of Operation 2.3 SF7x Series Storage Enclosure The SF7x storage enclosure connects its resident disk ISEs to the DSSI bus in parallel. If one of the four drive positions is empty, that position is ignored. If a position is occupied, the ISE can be on-line or off-line, MSCP enabled or disabled, powered up or down, or failed.

  • Page 39: Dssi Id Switch Settings (Single-System And Stripe Set)

    Theory of Operation 2–15 Table 2–6 DSSI ID Switch Settings (Single-System and Stripe Set) DSSI Disk ISE Setting Positions 1, 2, 4, and 7 Left Rear (LR) Left Front (LF) Right Front (RF) Right Rear (RR) Positions 3 and 8 Left Rear (LR) Left Front (LF) Right Front (RF)

  • Page 40: Sf7X Operator Control Panel

    2–16 Theory of Operation Figure 2–5 SF7x Operator Control Panel d i g i t a l Write DSSI DSSI Write Ready Fault Ready Fault Protect Protect S H R _ X 1 1 2 8 B _ 8 9...

  • Page 41: Sf7X Operating Modes

    Theory of Operation 2–17 2.3.2 SF7x Operating Modes SF7x series storage enclosures can operate in either through-bus or split-bus mode. These modes are described in the following sections. 2.3.2.1 Through-Bus Mode In through-bus mode, all four drive positions (if occupied or not) are connected to one DSSI bus.

  • Page 42: Front Panel Controls, Labels, And Indicators

    2–18 Theory of Operation 2.3.3 Front Panel Controls, Labels, and Indicators The various controls and indicators on the storage enclosure allow you to place the resident ISEs in a variety of operating states. These controls and indicators connect to the ISE on the OCP 10-pin cable and the 5-pin power cable.

  • Page 43: Service Guidelines

    Theory of Operation 2–19 2.4 Service Guidelines The following sections contain the guidelines for servicing the storage arrays and the storage enclosures. The guidelines for servicing the DECarray are: • Never disconnect a 42-inch, 70-inch, or 108-inch DSSI cable that is connected to a storage enclosure, magazine tape ISE, or the DECarray while power is on.

  • Page 45: Troubleshooting

    Troubleshooting This chapter describes troubleshooting procedure for the DECarray and storage enclosures. For this topic . . . Section . . . Troubleshooting the subsystem to verify a fault Troubleshooting and fault isolation to a subsystem component General troubleshooting and fault isolation of the DECarray and storage enclosure Specific troubleshooting and fault isolation of the DECarray 3.2.1...

  • Page 46: Subsystem Fault Verification

    3–2 Troubleshooting 3.1 Subsystem Fault Verification Use this section to determine if the error, fault, or failure reported is in the DSSI storage subsystem. The subsystem consists of the following: • Adapter module(s), installed in the host system(s) • DECarray(s) •...

  • Page 47: Decarray And Storage Enclosure Checklist

    Troubleshooting 3–3 Table 3–2 DECarray and Storage Enclosure Checklist Items to check at the rear . . . No, then . . . DECarray is plugged in? Plug in main power cord. BUS/OFF/ON switch on power controller down? Set switch down. The power controller circuit breaker is on? Set breaker to ON.
  • Page 48 3–4 Troubleshooting Table 3–2 (Continued) DECarray and Storage Enclosure Checklist Items to check at the front. . . No, then. . . Any Fault LEDs lit? Press the Fault button and read the fault code Replace the failed ISE. Is the fan spinning? Check the power supply and cord.

  • Page 49: Troubleshooting The Decarray

    Troubleshooting 3–5 3.2.1 Troubleshooting the DECarray The following sections describe the procedure for isolating a fault or failure in the DECarray. 3.2.1.1 Introduction The DECarray consists of a power controller to supply ac power for internally installed storage enclosures, a 16-port I/O panel to connect the DECarray to a system or systems, and the DECarray cabinet assembly.

  • Page 50: Troubleshooting The Storage Enclosure

    3–6 Troubleshooting 3.2.2 Troubleshooting the Storage Enclosure Use this section only after you have determined that the problem or fault is not in the adapter modules or tape magazine tapes, or the DECarray (power controller and configuration). 3.2.2.1 Introduction The storage enclosure consists of several major components: •...

  • Page 51: Optional Fault Isolation Steps With The Dssi Bus Meter

    Troubleshooting 3–7 3.2.3 Optional Fault Isolation Steps with the DSSI Bus Meter The DSSI bus meter (DBM) is a small, easily portable device used to look at bus signals in real-time as well as verify DSSI ID numbers. The DBM can quickly locate faulty cables or duplicate DSSI ID numbers on a given DSSI bus.

  • Page 52: Troubleshooting Chart

    3–8 Troubleshooting 3.3 Troubleshooting Chart Use this section to find a symptom, probable cause, corrective action, and references to the FRU procedure only after you have gone through all the checks and procedures in the previous sections. Table 3–3 Storage Enclosure Troubleshooting Chart Symptom(s) Probable Cause(s) Corrective Action(s)
  • Page 53 Troubleshooting 3–9 Table 3–3 (Continued) Storage Enclosure Troubleshooting Chart Symptom(s) Probable Cause(s) Corrective Action(s) Single Fault LED lit Faulty disk ISE. Press lit Fault button. on OCP. Read fault code Replace failed FRU Conflicting DSSI Verify correct DSSI ID numbers. node ID settings for that all devices on that DSSI bus.
  • Page 54 3–10 Troubleshooting Table 3–3 (Continued) Storage Enclosure Troubleshooting Chart Symptom(s) Probable Cause(s) Corrective Action(s) ISE is not seen or Incorrect DSSI Verify correct DSSI seen at unexpected node ID setting node ID settings for DSSI ID value. that bus. Cables are not Check that both ends of plugged in OCP cables are plugged...

  • Page 55: Disk Ise Fault Codes (For Sf7X Only)

    Troubleshooting 3–11 Table 3–3 (Continued) Storage Enclosure Troubleshooting Chart Symptom(s) Probable Cause(s) Corrective Action(s) In a DSSI Excessive Measure ground VAXcluster ground offset offset voltage between installation, one voltage between cabinets. or more of the DSSI VAXcluster following symptoms cabinets. Correct faults in power are observed: distribution system.

  • Page 57: Doors

    DECarray FRU Removal and Replacement This chapter contains removal and replacement procedures for the DECarray field replaceable units (FRUs). NOTE You do not have to remove the storage array doors when servicing the array or any installed device. 4.1 Doors Occasionally, you may need to replace a front or rear door.
  • Page 58 4–2 DECarray FRU Removal and Replacement Install the new door. 1. Lift and place the door up on the door hinges. 2. Replace the screw securing the ESD ground wire to the cabinet at the door. 3. Swing the door closed. 4.

  • Page 59: Removing Decarray Door

    DECarray FRU Removal and Replacement 4–3 Figure 4–1 Removing DECarray Door D O O R H I N G E S H R - X 0 0 1 2 - 9 1...

  • Page 60: Power Controller

    4–4 DECarray FRU Removal and Replacement 4.2 Power Controller The only FRU in the cabinet is the power controller. If it is not functioning correctly, then part of the cabinet or the entire cabinet will not power up. This power controller is a single FRU; if it fails, replace it. To replace a power controller, perform the following steps.
  • Page 61 DECarray FRU Removal and Replacement 4–5 5. Turn off the breaker on the power controller (Figure 4–2). 6. Disconnect all enclosure ac power cords that are connected to the power controller. 7. Disconnect the controller power cord from the room power source. 8.

  • Page 62: Power Controller

    4–6 DECarray FRU Removal and Replacement Figure 4–2 Power Controller FUSE LABEL POWER CONTROL POWER CORD CIRCUIT BUS CONNECTORS STRAIN RELIEF UNDELAYED BREAKER POWER FUSE CORD DELAYED GROMMETED SERIAL/LOGO (0.5 SEC) CORD LABEL OPENING BUS/OFF/ON SWITCH (SYMBOLS CLOCKWISE FROM TOP) S H R - X 0 1 0 7 - 9 0...

  • Page 63: Dssi Interconnect Cables

    DECarray FRU Removal and Replacement 4–7 4.3 DSSI Interconnect Cables These DSSI interconnect cables are external to the storage enclosure and are used as follows: • The 42-inch (PN BC21Q–3F) connects the enclosures to each other and to magazine tape subsystems. •...

  • Page 64: Dssi Label Color Codes (Single-System Configurations)

    4–8 DECarray FRU Removal and Replacement 6. Disconnect both ends of the cable. 7. Connect the new cable. 8. Fill out new labels and place them on both ends of the new cable. Remember to use the colored labels supplied in the SF Family Label Booklet and write the same information on the new label as the faulty cable.

  • Page 65: Dssi Label Color Codes (Dssi Vaxcluster Configurations)

    DECarray FRU Removal and Replacement 4–9 Table 4–2 DSSI Label Color Codes (DSSI VAXcluster Configurations) I/O Ports SF7x I/O Port SF3x Label Color for ... Position for ... Position Blue 5, 1 2 Rear 2,10 6, 2 2 Front Yellow 3,11 4, 8 4 Rear...

  • Page 66: Dssi Label Color Codes (Stripe Set Configurations)

    4–10 DECarray FRU Removal and Replacement Table 4–3 DSSI Label Color Codes (Stripe Set Configurations) SF7x Label Color(s) Port Position SF3x Position Blue 1 Right 2 Right Rear 1 Left 2 Left Rear Yellow 2 Right 2 Right Front Green 2 Left 2 Left Front Blue &...
  • Page 67 SF3x Storage Enclosure FRU Replacement This chapter describes the procedures for removing, replacing, and checking for correct operation after repairing the FRUs associated with the SF3x series storage enclosure. See the service documentation for the other components of the DSSI subsystem such as the magazine tape subsystem (installed in the DECarray) and the DSSI adapters (installed in the system or systems).
  • Page 68 5–2 SF3x Storage Enclosure FRU Replacement The procedures covered in this chapter include: • Warm swap of the disk ISEs, Section 5.1 NOTE The following FRUs require the storage enclosure to be powered down. • OCP, (Section 5.2) • Power supply, (Section 5.3) •...

  • Page 69: Sf3X Storage Enclosure Front View

    SF3x Storage Enclosure FRU Replacement 5–3 Figure 5–1 SF3x Storage Enclosure Front View Front Rear OPERATOR A B C D E F A B C D E F CONTROL PANEL Front Rear DC POWER A B C D E F A B C D E F SWITCHES MA 0434 92.GRA...

  • Page 70: Sf3X Storage Enclosure Rear View

    5–4 SF3x Storage Enclosure FRU Replacement Figure 5–2 SF3x Storage Enclosure Rear View DSSI Connectors Power Supply Fault Indicator (Behind Panel) FAULT Line Voltage AC Receptacle AC Power Selected Switch Switch (Behind Panel) MA 0430 92.GRA...

  • Page 71: Warm Swap Of Disk Ise

    SF3x Storage Enclosure FRU Replacement 5–5 5.1 Warm Swap of Disk ISE CAUTION Only qualified service personnel should perform the following procedures. Before beginning these procedures, make sure that the system manager has backed up all files on the disk ISE. This section covers removing and replacing the disk ISE from the SF3x storage enclosure.

  • Page 72: Obtaining Current Disk Ise Parameters

    5–6 SF3x Storage Enclosure FRU Replacement 5.1.1 Obtaining Current Disk ISE Parameters Use the following procedure when performing a disk ISE warm swap or when repairing a disk ISE: 1. Find the node name of the disk ISE by typing either the SHOW DEVICE (Example 5–1) or the SHOW CLUSTER (Example 5–2) DCL command at the system console.

  • Page 73: Show Cluster

    SF3x Storage Enclosure FRU Replacement 5–7 Example 5–2 SHOW CLUSTER $ SHOW CLUSTER View of Cluster from system ID 63973 node: CLOUDF +-------------------+---------+ SYSTEMS | MEMBERS | +--------+----------+---------+ NODE | SOFTWARE | STATUS | +--------+----------+---------+ | CLOUDF | VMS V5.4 | MEMBER | R2CYAA | RFX V200 | | R2RRBA | RFX V200 | +--------+----------+---------+...

  • Page 74: Set Host/Dup

    5–8 SF3x Storage Enclosure FRU Replacement Example 5–3 SET HOST/DUP $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS R2CYAA %HSCPAD-I-LOCPROGEXE, Local program executing - type ^\ to exit Copyright (C) 1990 Digital Equipment Corporation PARAMS> SHOW NODENAME Parameter Current Default Type Radix --------- ---------------- -----------------...

  • Page 75: Analyze/System

    SF3x Storage Enclosure FRU Replacement 5–9 NOTE This command displays a page of data. Press to bring up Return the next screen of data, where you will find the system ID. Example 5–4 ANALYZE/SYSTEM $ ANALYZE/SYSTEM VAX/VMS System analyzer SDA> SHOW DEVICE $1$DIA21 I/O data structures ------------------- $1$DIA21...

  • Page 76: Warm Swap And Repair Procedures

    5–10 SF3x Storage Enclosure FRU Replacement 5.1.2 Warm Swap and Repair Procedures Before you start the removal and replacement procedures, you must obtain all necessary parameters from the device to be replaced, or operating system data structures. If you have not done this, refer back to Section 5.1.1.

  • Page 77: Disk Ise Removal

    SF3x Storage Enclosure FRU Replacement 5–11 Figure 5–3 Disk ISE Removal r i t M A - 0 4 7 7 - 9 2 . D G...

  • Page 78: Disk Ise Replacement

    5–12 SF3x Storage Enclosure FRU Replacement Figure 5–4 Disk ISE Replacement P o w e r C a b l e D S S I C a b l e O C P C a b l e M A - 0 4 7 8 - 9 2 . D G...
  • Page 79 SF3x Storage Enclosure FRU Replacement 5–13 6. Remove the four screws holding the top cover on the carrier and remove the cover. 7. Remove the faulty ISE from the carrier by removing the two screws on each side of the bottom of the carrier (see Figure 5–4). 8.

  • Page 80: Restoring The Disk Ise

    5–14 SF3x Storage Enclosure FRU Replacement 5.1.3 Restoring the Disk ISE Follow the steps in this section to bring a disk ISE back into service on its DSSI bus. CAUTION Perform the following steps only after repairing or replacing a disk ISE.

  • Page 81: Params Dialog Restoring Disk Ise Parameters

    Example 5–5 shows typical dialog for the disk ISE using the steps above. Example 5–5 PARAMS Dialog Restoring Disk ISE Parameters $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS R2QSAA %HSCPAD-I-LOCPROGEXE, Local program executing - type ^\ to exit Copyright (C) 1990 Digital Equipment Corporation PARAMS> SHOW NODENAME Parameter Current Default...
  • Page 82 5–16 SF3x Storage Enclosure FRU Replacement Example 5–5 (Continued) PARAMS Dialog Restoring Disk ISE Parameters PARAMS> SHOW FORCEUNI Parameter Current Default Type Radix --------- ---------------- ----------------- --------- ----- FORCEUNI Boolean PARAMS> SET FORCEUNI 0 NOTE: Verify the correct parameter settings before writing. Use the SHOW command. PARAMS>...

  • Page 83: Testing The Disk Ise

    Operation aborted by user Example 5–6 Running DRVTST $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=DRVTST R1EJAA Copyright © 1989 Digital Equipment Corporation Write/read anywhere on the medium? [1=Yes/(0=No)] 1 User data will be corrupted. Proceed? [1=Yes/(0=No)] 1 ¡ 5 minutes to complete.

  • Page 84: Drvtst Error Messages

    5–18 SF3x Storage Enclosure FRU Replacement This query gives you the chance to reconsider. If you answer no (0), ¡ your response to the first query is overridden, and a read-only test is executed. If you answer yes (1), DRVTST begins executing a write /read test of the disk ISE.

  • Page 85: Mounting The Disk Ise

    SF3x Storage Enclosure FRU Replacement 5–19 5.1.5 Mounting the Disk ISE Once testing completes successfully, mount the disk ISE and restore data with BACKUP. The SHOW CLUSTER command will continue to show the original name of the replacement drive module. This will disappear only after the next reboot.

  • Page 86: Replacing The Power Supply

    5–20 SF3x Storage Enclosure FRU Replacement 5.3 Replacing the Power Supply Use the following steps to remove and replace the enclosure power supply (PN H7969–AA). 1. At the system console, dismount all the ISEs on that bus. 2. Take the disk ISEs in the storage enclosure off-line: a.
  • Page 87 SF3x Storage Enclosure FRU Replacement 5–21 8. Fit the tabs on the replacement power supply between the rails previously noted, and slide the power supply into the enclosure. Gently press the power supply to seat it in its connector. 9. Tighten the captive screws. Do not use force as you may strip the threads in the chassis.

  • Page 88: Replacing The Fan Assembly

    5–22 SF3x Storage Enclosure FRU Replacement 5.4 Replacing the Fan Assembly Use the following steps to remove and replace the fan assembly (PN 70–24440–01): 1. At the system console, dismount all the ISEs on that bus. 2. Take the disk ISEs in the storage enclosure off-line: a.

  • Page 89: Removing And Replacing The Fan Assembly

    SF3x Storage Enclosure FRU Replacement 5–23 9. Pull the fan assembly straight up to remove (Figure 5–5). Figure 5–5 Removing and Replacing the Fan Assembly CAPTIVE SCREWS CABLE C A B L E T R A Y LATCH M A - 0 6 5 3 - 9 2 . D G...
  • Page 90 5–24 SF3x Storage Enclosure FRU Replacement 10. Orient the replacement fan assembly with the fan motor facing the front of the enclosure and with the fan cable exiting on the left top of the assembly. 11. Slide the fan assembly in and gently tighten the captive screws, while avoiding any internal DSSI cables.

  • Page 91: Replacing The Transition Module

    SF3x Storage Enclosure FRU Replacement 5–25 5.5 Replacing the Transition Module Use the following procedure to remove and replace the transition module (TM) (PN 54–21199–01): 1. Perform an orderly shutdown of the host system and all devices on that bus. Remove ac power to the host system(s). 2.

  • Page 92: Removing And Replacing The Transition Module

    5–26 SF3x Storage Enclosure FRU Replacement 6. Disconnect all the cables from the transition module. 7. Remove the philips-head screws from each corner of the transition module. 8. Remove the transition module. Figure 5–6 Removing and Replacing the Transition Module T R A N S I T I O N M O D U L E FRAME...

  • Page 93: Replacing The Backplane

    SF3x Storage Enclosure FRU Replacement 5–27 9. Install the new transition module and tighten the four screws. 10. Replace all cables on the appropriate transition module connectors. 11. If applicable, set any DSSI node ID switches that need setting. Table 2–2. 12.

  • Page 94: Cable Replacement Procedures

    5–28 SF3x Storage Enclosure FRU Replacement 5.7 Cable Replacement Procedures NOTE Do not disconnect any DSSI interconnect cables while power is applied to the storage array (all installed ISEs) and the system(s). The ac power cord, power harness, OCP cables, and DSSI cables are storage enclosure FRUs.

  • Page 95: Replacing The Ac Power Cord

    SF3x Storage Enclosure FRU Replacement 5–29 5.7.1 Replacing the AC Power Cord Use the following procedure to remove and replace the storage enclosure ac power cord (PN 17–00442–18): 1. At the system console, dismount the disk ISEs in all storage enclosures.

  • Page 96: Ac Power Cord Retainer

    5–30 SF3x Storage Enclosure FRU Replacement Figure 5–7 AC Power Cord Retainer S C A L E D . 7 0 F R O M I G S - C L A M P - A S S Y . D G S H R - X 0 1 3 7 - 9 0 8.

  • Page 97: Replacing The Ocp To Tm Cable

    SF3x Storage Enclosure FRU Replacement 5–31 5.7.2 Replacing the OCP to TM Cable Use the following procedure to remove and replace the OCP to TM cable (PN 17–03471–01): 1. At the system console, dismount all the ISEs on that bus. 2.
  • Page 98 5–32 SF3x Storage Enclosure FRU Replacement 6. Remove the cable (Figure 5–8) as follows: a. Disconnect the cable at J2 and J3 on the front of the TM. b. Remove the screws, washers, nuts, and lock washers from the cable connector at the OCP end. WARNING Be careful not to drop any parts inside the assembly.

  • Page 99: Removing And Replacing The Ocp To Tm Cable

    SF3x Storage Enclosure FRU Replacement 5–33 Figure 5–8 Removing and Replacing the OCP to TM Cable O C P TRANSITION C O N N E C T O R MODULE S C R E W S M A - 0 5 6 5 - 9 2 . D G...

  • Page 100: Replacing The Power Harness

    5–34 SF3x Storage Enclosure FRU Replacement 5.7.3 Replacing the Power Harness Use the following procedure to remove and replace the storage enclosure power harness (PN 17–03469–01): 1. Perform an orderly shutdown of the host system and all devices on that bus. Remove ac power to the system(s). 2.
  • Page 101 SF3x Storage Enclosure FRU Replacement 5–35 inner assembly, grasp the sheet metal in front of the fan, and pull. Set the inner assembly on an antistatic work surface. 10. Turn the storage enclosure upside down. 11. Remove the two phillips screws holding the cover over the dc power switch module and remove the cover.

  • Page 102: Replacing The Internal Dssi Cables

    5–36 SF3x Storage Enclosure FRU Replacement 5.7.4 Replacing the Internal DSSI Cables Use the following procedure to remove and replace the storage enclosure internal DSSI cable (PN 17–03472–01): 1. Perform an orderly shutdown of the host system and all devices on that bus.
  • Page 103 SF3x Storage Enclosure FRU Replacement 5–37 WARNING—USE TWO PEOPLE. Releasing the latch allows the inner assembly to be removed from the extrusion tube for this operation. Be prepared to take the weight of the inner assembly when it comes free of the extrusion tube.
  • Page 104 5–38 SF3x Storage Enclosure FRU Replacement 18. If necessary, tape the two DSSI cables for that side of the enclosure together. 19. Replace the fan assembly. WARNING—USE TWO PEOPLE. Use two people to place the inner assembly back into the extrusion tube mounted in the storage array.

  • Page 105: Replacing The Dc Switch Module

    SF3x Storage Enclosure FRU Replacement 5–39 5.8 Replacing the DC Switch Module Use the following procedure for replacing the dc switch module (PN 54-21209-01). 1. Perform an orderly shutdown of the host system and all devices on that bus. Remove ac power to the system(s). 2.
  • Page 106 5–40 SF3x Storage Enclosure FRU Replacement inner assembly, grasp the sheet metal in front of the fan, and pull. Set the inner assembly on an antistatic work surface. 10. Turn the storage enclosure upside down. 11. Remove the two phillips screws holding the cover over the dc power switch module and remove the cover.

  • Page 107: Postrepair Checkout And Power-Up

    SF3x Storage Enclosure FRU Replacement 5–41 5.9 Postrepair Checkout and Power-Up Perform the following procedure to power up and check normal operation of the storage enclosure and any FRUs that have been replaced or repaired. CAUTION Ensure that the inner assembly is back in the extrusion tube. Failure to do so will defeat the cooling airflow of the enclosure and may result in permanent damage to the disk ISEs or power supply.

  • Page 108: From The Front Of The Storage Array

    5–42 SF3x Storage Enclosure FRU Replacement 5.9.2 From the Front of the Storage Array Perform these steps in the order presented. 1. Ensure that the ac power switch at the rear of the enclosure is on. 2. Listen for the fan spinning. If the fan is not spinning, press the ac power switch to the off position and see Chapter 3.
  • Page 109 SF7x Storage Enclosure FRU Replacement This chapter describes the procedures for removing, replacing, and checking for correct operation after repairing the field replaceable units (FRUs) associated with the SF7x series storage enclosure. See the service documentation for the other components of the DSSI subsystem such as the magazine tape subsystem (installed in the DECarray) and the DSSI adapters (installed in the system or systems).
  • Page 110 6–2 SF7x Storage Enclosure FRU Replacement The procedures covered in this chapter include: • Warm swap of the disk ISEs, (Section 6.1) NOTE The following FRUs require the storage enclosure to be powered down. • OCP, (Section 6.2) • Power supply, (Section 6.3) •...

  • Page 111: Storage Enclosure Exploded View

    SF7x Storage Enclosure FRU Replacement 6–3 CAUTION Wear an ESD grounding strap at all times while handling the storage enclosure or any of its FRUs. See Figure 6–1 for the location and names of the major assemblies of the SF7x series storage enclosure. Figure 6–1 Storage Enclosure Exploded View R I G H T R E A R D I S K I S E...

  • Page 112: Warm Swap Of Disk Ise

    6–4 SF7x Storage Enclosure FRU Replacement 6.1 Warm Swap of Disk ISE CAUTION Only qualified service personnel should perform the following procedures. Before proceding, make sure that the system manager has backed up all files on the disk ISE. This section covers removing and replacing the disk ISE from the storage enclosure, and removing and replacing the disk ISE FRUs.

  • Page 113: Obtaining Current Disk Ise Parameters

    SF7x Storage Enclosure FRU Replacement 6–5 6.1.1 Obtaining Current Disk ISE Parameters Use the following procedure when performing a disk ISE warm swap or when repairing a disk ISE: 1. Find the node name of the disk ISE by typing either the SHOW DEVICE (Example 6–1) or the SHOW CLUSTER (Example 6–2) DCL command at the system console.

  • Page 114: Show Cluster

    6–6 SF7x Storage Enclosure FRU Replacement Example 6–2 SHOW CLUSTER $ SHOW CLUSTER View of Cluster from system ID 63973 node: CLOUDF +-------------------+---------+ SYSTEMS | MEMBERS | +--------+----------+---------+ NODE | SOFTWARE | STATUS | +--------+----------+---------+ | CLOUDF | VMS V5.4 | MEMBER | R2CYAA | RFX V200 | | R2RRBA | RFX V200 | +--------+----------+---------+...

  • Page 115: Set Host/Dup

    SF7x Storage Enclosure FRU Replacement 6–7 Example 6–3 SET HOST/DUP $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS R2CYAA %HSCPAD-I-LOCPROGEXE, Local program executing - type ^\ to exit Copyright (C) 1990 Digital Equipment Corporation PARAMS> SHOW NODENAME Parameter Current Default Type Radix --------- ---------------- -----------------...

  • Page 116: Analyze/System

    6–8 SF7x Storage Enclosure FRU Replacement NOTE This command displays a page of data. Press to bring up Return the next screen of data, where you will find the system ID. Example 6–4 ANALYZE/SYSTEM $ ANALYZE/SYSTEM VAX/VMS System analyzer SDA> SHOW DEVICE $1$DIA21 I/O data structures ------------------- $1$DIA21...

  • Page 117: Warm Swap And Repair Procedures

    SF7x Storage Enclosure FRU Replacement 6–9 6.1.2 Warm Swap and Repair Procedures Before you start the removal and replacement procedures, you must obtain all necessary parameters from the device to be replaced, or operating system data structures. If you have not done this, refer back to Section 6.1.1.

  • Page 118: Storage Enclosure Front View

    6–10 SF7x Storage Enclosure FRU Replacement Figure 6–2 Storage Enclosure Front View O P E R A T O R C O N T R O L P A N E L ( O C P ) d i g i t a l Write DSSI DSSI...
  • Page 119 SF7x Storage Enclosure FRU Replacement 6–11 CAUTION Do not attempt the following steps unless you have taken precautions against ESD. Wear an ESD grounding strap. Do not place the disk ISE on anything other than a grounded antistatic work surface. Failure to observe these precautions can result in ESD damage to the disk ISEs.

  • Page 120: Removing And Replacing A Disk Ise

    6–12 SF7x Storage Enclosure FRU Replacement Figure 6–3 Removing and Replacing a Disk ISE N O T E T O I L L U S T R A T O R : f r o n t p a n e l f o r t h i s h a r d w a r e i s S H R _ X 1 1 2 7 _ 8 9 I S O L a n d r e d u c e d 1 7 / 6 4 ( .

  • Page 121: Disk Ise Skid Plate And Wedges

    SF7x Storage Enclosure FRU Replacement 6–13 Figure 6–4 Disk ISE Skid Plate and Wedges N O T E T O I L L U S T R A T O R : T h i s i l l u s t r a t i o n i s R F 7 2 a t .
  • Page 122 6–14 SF7x Storage Enclosure FRU Replacement 12. Use the following steps to remove and replace either disk ISE FRU. CAUTION • Static electricity can damage the circuitry on the drive module. To avoid this problem, use an antistatic wrist strap and grounded work surface, such as that in the antistatic kit (PN 29–26246), when performing these steps.

  • Page 123: Separating The Hda From The Drive Module

    SF7x Storage Enclosure FRU Replacement 6–15 Figure 6–5 Separating the HDA from the Drive Module M A - X 0 9 6 2 - 8 8 S H R - X 0 1 5 7 - 9 0...

  • Page 124: Disconnecting The Flex Circuit

    6–16 SF7x Storage Enclosure FRU Replacement Figure 6–6 Disconnecting the Flex Circuit M A - X 0 9 6 1 - 8 8 S H R - X 0 1 5 6 - 9 0...
  • Page 125 SF7x Storage Enclosure FRU Replacement 6–17 Carefully remove the connector attaching the flex circuit to the drive module, as shown in Figure 6–6. d. If the HDA is to be replaced, remove the wedges from the HDA frame assembly at this time. Note their orientation. e.
  • Page 126 6–18 SF7x Storage Enclosure FRU Replacement 15. Orient the disk ISE with the skid plate facing the outside wall of the enclosure frame. The disk ISE is installed with its rear connectors facing out of the storage enclosure. 16. While holding the wedges forward, slide the replacement disk ISE into the drive position.

  • Page 127: Restoring The Disk Ise

    SF7x Storage Enclosure FRU Replacement 6–19 6.1.3 Restoring the Disk ISE Follow the steps in this section to bring a disk ISE back into service on its DSSI bus. CAUTION Perform the following steps only after repairing or replacing a disk ISE.

  • Page 128: Drive Module Replaced

    6–20 SF7x Storage Enclosure FRU Replacement 6.1.3.2 Drive Module Replaced Use this section only if you replaced the drive module. Follow each step in the order presented and do not skip or miss any steps. 1. Set the MSCP switch to the disabled or up position (Figure 6–8). 2.

  • Page 129: Restoring The Disk Ise Parameters

    SF7x Storage Enclosure FRU Replacement 6–21 6.1.3.3 Restoring the Disk ISE Parameters Restore the parameters to the repaired disk ISE by following these steps in the order presented: 1. Find the node name of the replacement drive module (or disk ISE), R2QSAA in this example.

  • Page 130: Params Dialog Restoring Disk Ise Parameters

    6–22 SF7x Storage Enclosure FRU Replacement Example 6–5 PARAMS Dialog Restoring Disk ISE Parameters $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS R2QSAA %HSCPAD-I-LOCPROGEXE, Local program executing - type ^\ to exit Copyright (C) 1990 Digital Equipment Corporation PARAMS> SHOW NODENAME Parameter Current Default Type...

  • Page 131: Testing The Disk Ise

    SF7x Storage Enclosure FRU Replacement 6–23 Example 6–5 (Continued) PARAMS Dialog Restoring Disk ISE Parameters NOTE: BEFORE RESPONDING TO THE FOLLOWING QUESTION, SET THE MSCP SWITCH TO THE OFF OR DOWN POSITION. Changes require controller initialization, ok? [Y/(N)] Y Initializing... NOTE: It takes approximately 1 minute before the following message prints.

  • Page 132: Set Host/Dup

    Operation aborted by user Example 6–6 Running DRVTST $ SET HOST/DUP/SERVER=MSCP$DUP/TASK=DRVTST R1EJAA Copyright © 1989 Digital Equipment Corporation Write/read anywhere on the medium? [1=Yes/(0=No)] 1 User data will be corrupted. Proceed? [1=Yes/(0=No)] 1 ¡ 5 minutes to complete.

  • Page 133: Mounting The Disk Ise

    SF7x Storage Enclosure FRU Replacement 6–25 This message indicates that DRVTST executed successfully. £ If an error condition is found during the execution of DRVTST, an error message is displayed. Two types of errors are reported: • Soft errors, which are corrected during the operation of the disk ISE •...

  • Page 134: Replacing The Ocp

    6–26 SF7x Storage Enclosure FRU Replacement 6.2 Replacing the OCP Use the following steps to remove and replace the OCP (PN 70–26060–01): 1. At the system console, dismount all the ISEs on that bus. 2. Access the front of the enclosure by opening the cabinet door. 3.
  • Page 135 SF7x Storage Enclosure FRU Replacement 6–27 Install the new OCP (Figure 6–9). CAUTION Do not bend the alignment or connector pins when reinstalling the OCP. The panel should go into place without force. 1. Align the OCP connector pins with the clip fasteners on the transition- termination module and push straight in to lock the fasteners.

  • Page 136: Removing The Ocp

    6–28 SF7x Storage Enclosure FRU Replacement Figure 6–9 Removing the OCP TTM CLIP FASTENERS FRONT COVER CONNECTOR PINS WRIST STRAP OPERATOR CONTROL PANEL S H R _ X 1 1 1 3 _ 8 9 _ S C N...

  • Page 137: Replacing The Power Supply

    SF7x Storage Enclosure FRU Replacement 6–29 6.3 Replacing the Power Supply Use the following steps to remove and replace the enclosure power supply (PN H7869–AK for SF7x). 1. At the system console, dismount all the ISEs on that bus. 2. Access the enclosure by opening the cabinet doors. 3.

  • Page 138: Storage Enclosure Rear View

    6–30 SF7x Storage Enclosure FRU Replacement Figure 6–10 Storage Enclosure Rear View D S S I C O N N E C T O R S F A U L T F A U L T F A U L T P O W E R S U P P L Y F A U L T I N D I C A T O R ( B E H I N D P A N E L )
  • Page 139 SF7x Storage Enclosure FRU Replacement 6–31 Install the new power supply. 1. Fit the tabs on the replacement power supply between the rails previously noted, and slide the power supply into the enclosure. Gently press the power supply to seat it in its connector. 2.

  • Page 140: Replacing The Fan Assembly

    6–32 SF7x Storage Enclosure FRU Replacement 6.4 Replacing the Fan Assembly Use the following steps to remove and replace the fan assembly (PN 70–24440–01): 1. At the system console, dismount all the ISEs on that bus. 2. Access the storage enclosure by opening the cabinet doors. 3.

  • Page 141: Removing And Replacing The Fan Assembly

    SF7x Storage Enclosure FRU Replacement 6–33 9. Loosen the four captive captive screws in each corner of the fan assembly (Figure 6–11). 10. Pull the fan assembly straight up to remove (Figure 6–11). Figure 6–11 Removing and Replacing the Fan Assembly CAPTIVE SCREWS (4 PLACES)
  • Page 142 6–34 SF7x Storage Enclosure FRU Replacement Install the new fan assembly (Figure 6–11). 1. Orient the fan assembly with the fan motor facing the front of the enclosure and with the fan cable exiting on the left top of the assembly.

  • Page 143: Replacing The Transition-Termination Module

    SF7x Storage Enclosure FRU Replacement 6–35 6.5 Replacing the Transition-Termination Module Use the following procedure to remove and replace the transition- termination module (TTM) (PN 54–19081–01): 1. Perform an orderly shutdown of the host system and all devices on that bus. Remove ac power to the host system(s). 2.

  • Page 144: Removing And Replacing The Transition-Termination Module

    6–36 SF7x Storage Enclosure FRU Replacement 9. Now remove the TTM (Figure 6–12). Figure 6–12 Removing and Replacing the Transition-Termination Module T T M FRAME S H R - X 0 0 0 1 A - 9 1...
  • Page 145 SF7x Storage Enclosure FRU Replacement 6–37 Install the new transition-termination module. 1. Align the new TTM with the nylon posts (Figure 6–12). 2. Set the small black jumper on the TTM to the same bus mode operation as the one replaced. 3.

  • Page 146: Replacing The Drive Dc Power Switch

    6–38 SF7x Storage Enclosure FRU Replacement 6.6 Replacing the Drive DC Power Switch Use the following procedure to remove and replace the drive dc power switch (PN 17–12717–13): 1. Perform an orderly shutdown of the host system and all devices on that bus.
  • Page 147 SF7x Storage Enclosure FRU Replacement 6–39 10. Loosen the four captive screws in the corners of the enclosure frame and push the inner assembly out of the enclosure until it engages the latch. WARNING—USE TWO PEOPLE. Releasing the latch allows the inner assembly to be removed from the extrusion tube for this operation.

  • Page 148: Removing And Replacing The Drive Dc Power Switches

    6–40 SF7x Storage Enclosure FRU Replacement Figure 6–13 Removing and Replacing the Drive DC Power Switches SINGLE BLACK SWITCH REAR PIGTAIL BLACK SINGLE/ PIGTAIL BLACK PHILLIPS POWER SUPPLY SINGLE SCREWS CONNECTOR ORANGE D R I V E D C P O W E R S W I T C H E S FRAME BOTTOM...
  • Page 149 SF7x Storage Enclosure FRU Replacement 6–41 Install the new drive dc power switch. 1. Install the new drive dc power switch into the enclosure frame. 2. Install all single-black, pigtail-black, and orange wires to all drive dc power switches, observing the correct drive position. 3.

  • Page 150: Cable Replacement Procedures

    6–42 SF7x Storage Enclosure FRU Replacement 6.7 Cable Replacement Procedures NOTE Do not disconnect any DSSI interconnect cables while power is applied to the storage array (all installed ISEs) and the system(s). The ac power cord, power harness, operator control panel (OCP) cables, and DSSI cables are storage enclosure FRUs.

  • Page 151: Replacing The Ac Power Cord

    SF7x Storage Enclosure FRU Replacement 6–43 6.7.1 Replacing the AC Power Cord Use the following procedure to remove and replace the storage enclosure ac power cord (PN 17–00442–18): 1. At the system console, dismount the disk ISEs in all storage enclosures.

  • Page 152: Ac Power Cord Retainer

    6–44 SF7x Storage Enclosure FRU Replacement Figure 6–14 AC Power Cord Retainer S C A L E D . 7 0 F R O M I G S - C L A M P - A S S Y . D G S H R - X 0 1 3 7 - 9 0 Install the new ac power cord.

  • Page 153: Replacing The Ocp To Ttm Cable

    SF7x Storage Enclosure FRU Replacement 6–45 6.7.2 Replacing the OCP to TTM Cable Use the following procedure to remove and replace the OCP to TTM cable (PN 17–02551–01): 1. At the system console, dismount all the ISEs on that bus. 2.
  • Page 154 6–46 SF7x Storage Enclosure FRU Replacement 7. Remove the cable (Figure 6–15) as follows: a. Disconnect the cable at J11 on the front of the TTM. b. Use a #1 Phillips screwdriver to remove the screw, washer, nut, and lock washer on the right side of the cable at the OCP end. WARNING Be careful not to drop any parts inside the assembly.

  • Page 155: Removing And Replacing The Ocp To Ttm Cable

    SF7x Storage Enclosure FRU Replacement 6–47 Figure 6–15 Removing and Replacing the OCP to TTM Cable J 1 1 T R A N S I T I O N - O C P T E R M I N A T I O N C O N N E C T O R M O D U L E ( T T M ) S C R E W S...

  • Page 156: Replacing The Power Harness

    6–48 SF7x Storage Enclosure FRU Replacement 6.7.3 Replacing the Power Harness Use the following procedure to remove and replace the storage enclosure power harness (PN 17–02389–01): 1. Perform an orderly shutdown of the host system and all devices on that bus. Remove ac power to the system(s). 2.
  • Page 157 SF7x Storage Enclosure FRU Replacement 6–49 WARNING—USE TWO PEOPLE. Releasing the latch allows the inner assembly to be removed from the extrusion tube for this operation. Be prepared to take the weight of the inner assembly when it comes free of the extrusion tube.

  • Page 158: Storage Enclosure Power Harness

    6–50 SF7x Storage Enclosure FRU Replacement 18. Trace and remove the power harness from all drive positions and the TTM. Figure 6–16 Storage Enclosure Power Harness SINGLE BLACK SWITCH REAR PIGTAIL SINGLE/ BLACK PIGTAIL BLACK PHILLIPS POWER SUPPLY SINGLE SCREWS CONNECTOR ORANGE D R I V E D C...
  • Page 159 SF7x Storage Enclosure FRU Replacement 6–51 Install the new power harness. 1. Install the power supply connector into the power supply bracket by tilting the connector until flush against the bracket. Secure the power supply connector with the two Phillips screws previously removed. 2.
  • Page 160 6–52 SF7x Storage Enclosure FRU Replacement WARNING—USE TWO PEOPLE. Use two people to place the inner assembly back into the extrusion tube mounted in the storage array. 7. Slide the inner assembly back into the extrusion tube. Secure the front panel captive screws. Do not use excessive force as it may strip the threads in the extrusion tube.

  • Page 161: Replacing The Ocp Cables

    SF7x Storage Enclosure FRU Replacement 6–53 6.7.4 Replacing the OCP Cables Use the following procedure to remove and replace the storage enclosure OCP cables for the front disk ISEs (PN 17–01936–03), or the OCP cables for the rear disk ISEs (PN 17–01936–04): 1.
  • Page 162 6–54 SF7x Storage Enclosure FRU Replacement WARNING—USE TWO PEOPLE. Releasing the latch allows the inner assembly to be removed from the extrusion tube for this operation. Be prepared to take the weight of the inner assembly when it comes free of the extrusion tube.
  • Page 163 SF7x Storage Enclosure FRU Replacement 6–55 Install the new OCP cable. 1. While facing the front of the storage enclosure, connect all the OCP cables to the new TTM: Left-rear disk ISE, J8 (left-rear of the TTM) Left-front disk ISE, J10 (left-front of the TTM) Right-front disk ISE, J9 (right-front of the TTM) Right-rear disk ISE, J7 (right-rear of the TTM) 2.

  • Page 164: Removing The Acoustic Panels

    6–56 SF7x Storage Enclosure FRU Replacement Figure 6–17 Removing the Acoustic Panels SCREW HOLES (6 PER PANEL) ACOUSTIC PANEL PHILLIPS SCREW FRAME ACOUSTIC PHILLIPS PANEL SCREW S H R - X 0 0 0 3 - 9 1...

  • Page 165: Replacing The Internal Dssi Cables

    SF7x Storage Enclosure FRU Replacement 6–57 6.7.5 Replacing the Internal DSSI Cables Use the following procedure to remove and replace the storage enclosure internal DSSI cable (PN 17–02994–01): 1. Perform an orderly shutdown of the host system and all devices on that bus.
  • Page 166 6–58 SF7x Storage Enclosure FRU Replacement WARNING—USE TWO PEOPLE. Releasing the latch allows the inner assembly to be removed from the extrusion tube for this operation. Be prepared to take the weight of the inner assembly when it comes free of the extrusion tube.
  • Page 167 SF7x Storage Enclosure FRU Replacement 6–59 Install the new internal DSSI cable. 1. Place the replacement cable in the inner assembly. 2. Insert the DSSI port connector in the rear DSSI bulkhead of the inner assembly so it is oriented the same as the one next to it. NOTE Ensure that no cables are pinched by the acoustic panel.

  • Page 168: Enclosure Internal Dssi Cables

    6–60 SF7x Storage Enclosure FRU Replacement Figure 6–18 Enclosure Internal DSSI Cables FRONT TOP VIEW REAR SHR-X0007-91.PS...

  • Page 169: Enclosure Internal Dssi Cables (Cont.)

    SF7x Storage Enclosure FRU Replacement 6–61 Figure 6–19 Enclosure Internal DSSI Cables (cont.) RIGHT FRONT RIGHT SIDE RIGHT REAR DRIVE POWER CABLE CABLE INTERNAL DSSI CABLE RED STRIPE SHR-X0005-91.PS...

  • Page 170: Enclosure Internal Dssi Cables (Cont.)

    6–62 SF7x Storage Enclosure FRU Replacement Figure 6–20 Enclosure Internal DSSI Cables (cont.) LEFT SIDE LEFT REAR LEFT FRONT RED STRIPE DRIVE POWER CABLE CABLE RED STRIPE INTERNAL DSSI CABLES SHR-X0006-91.PS...
  • Page 171 SF7x Storage Enclosure FRU Replacement 6–63 4. Replace the fan assembly by sliding the assembly into the inner assembly and tightening the captive screws. Connect the power cable to the TTM. 5. Replace the acoustic panels. Note that the front of the panel is stamped front.

  • Page 172: Postrepair Checkout And Power-Up

    6–64 SF7x Storage Enclosure FRU Replacement 6.8 Postrepair Checkout and Power-Up Perform the following procedure to power up and check the normal operation of the storage enclosure and any FRUs that have been replaced or repaired. CAUTION Ensure that the inner assembly is back in the extrusion tube and the front and rear covers are replaced before performing any of the following steps.

  • Page 173: Storage Enclosure Rear View

    SF7x Storage Enclosure FRU Replacement 6–65 Figure 6–21 Storage Enclosure Rear View D S S I C O N N E C T O R S F A U L T F A U L T F A U L T P O W E R S U P P L Y F A U L T I N D I C A T O R ( B E H I N D P A N E L )

  • Page 174: From The Front Of The Storage Array

    6–66 SF7x Storage Enclosure FRU Replacement 6.8.2 From the Front of the Storage Array Perform these steps in the order presented (Figure 6–22): 1. Ensure that the ac power switch at the rear of the enclosure is on. 2. Listen for the fan spinning. If the fan is not spinning, press the ac power switch to the off position and see Chapter 3.

  • Page 175: Storage Enclosure Front View

    SF7x Storage Enclosure FRU Replacement 6–67 Figure 6–22 Storage Enclosure Front View O P E R A T O R C O N T R O L P A N E L ( O C P ) d i g i t a l Write DSSI DSSI...

  • Page 177: Recommended Spare Parts

    Recommended Spare Parts This appendix contains the lists of recommended spare parts for the DECarray (Table A–1) and the SF7x storage enclosure (Table A–3). Table A–1 DECarray Recommended Spare Parts Part Number Description 70–26050–01 Front door 70–26051–01 Rear door 30–24374–01 881 power controller (120 V) 30–24374–02 881 power controller (240 V)

  • Page 178: Sf3X Recommended Spare Parts

    A–2 Recommended Spare Parts Table A–2 SF3x Recommended Spare Parts Part Number Description RF35–EA RF35 ISE RF36–EA RF36 ISE 70–24440–01 Fan assembly 70–28887–01 OCP assembly 70–28891–01 Connector guide assembly H7969–AA Power supply 54–21199–01 Transition module 54–12103–01 SF35 backplane 54–21209–01 DC power switch module 17–00442–18 9 foot ac power cord 17–03471–01...
  • Page 179 Recommended Spare Parts A–3 SF7x Storage Enclosure 70–23901–01 Chassis 70–24440–01 Fan assembly 70–23913–01 Frame assembly 70–26060–01 OCP assembly H7969–AK Power supply 54–19081–01 Transition-termination module 12–12717–13 Pushbutton switch with green LED 12–14027–12 Pushbutton switch cap, right rear 12–14027–13 Pushbutton switch cap, right front 12–14027–14 Pushbutton switch cap, left front 12–14027–15...

  • Page 181: Bdecarray Cabling Information

    DECarray Cabling Information This appendix consists of tables containing cabling information for the DECarray variations. B.1 Single-System Configurations for DECarray with SF7x Enclosures This section contains cabling information for DECarray variations containing SF7x enclosures in the single-system configuration. Note the following: •...

  • Page 182: Cabling Sf7X In Decarray Single-System Configurations

    B–2 DECarray Cabling Information Table B–1 Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: BA/BD Terminator DECarray BC21R-5L I/O port P1 CA/CD Terminator Bottom BC21Q-3F (with tape connector ISEs) of TF8x in position 5...
  • Page 183 DECarray Cabling Information B–3 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: FA/FD Terminator Bottom BC21Q-3F (with one connector tape ISE) of TF8x in position 5 Terminator DECarray BC21R-5L...
  • Page 184 B–4 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F DECarray BC21R-5L (without connector I/O port P1 tape ISE) of SF7x in position 3 Left BC21Q-3F...
  • Page 185 DECarray Cabling Information B–5 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F Bottom BC21R-5L (with two connector connector tape ISEs) of SF7x in of TF8x in position 3 position 5...
  • Page 186 B–6 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F DECarray BC21R-5L (plus SF7x, connector I/O port P1 without of SF7x in tape ISE) position 3 Left...
  • Page 187 DECarray Cabling Information B–7 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F Bottom BC21R-5L (plus SF7x, connector connector with one of SF7x in of TF8x in tape ISE) position 3...
  • Page 188 B–8 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F Bottom BC21R-5L (plus SF7x, connector connector with two of SF7x in of TF8x in tape ISEs) position 3...
  • Page 189 DECarray Cabling Information B–9 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F DECarray BC21R-5L (plus two connector I/O port P1 SF7x, of SF7x in without position 3 tape ISE)
  • Page 190 B–10 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F Bottom BC21R-5L (plus two connector connector SF7x, with of SF7x in of TF8x in one tape position 3...
  • Page 191 DECarray Cabling Information B–11 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD Right BC21Q-3F Bottom BC21R-5L (plus SF7x, connector connector with two of SF7x in of TF8x in tape ISEs) position 3...
  • Page 192 B–12 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD Right BC21Q-3F DECarray BC21R-5L (without connector I/O port P1 tape ISE) of SF7x in position 3 Left BC21Q-3F...
  • Page 193 DECarray Cabling Information B–13 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD Right BC21Q-3F Bottom BC21R-5L (with one connector connector tape ISE) of SF7x in of TF8x in position 3 position 5...
  • Page 194 B–14 DECarray Cabling Information Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD Right BC21Q-3F Bottom BC21R-5L (with two connector connector tape ISEs) of SF7x in of TF8x in position 3 position 5...
  • Page 195 DECarray Cabling Information B–15 Table B–1 (Continued) Cabling SF7x in DECarray Single-System Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: TA/TD (one Terminator DECarray BC21R-5L tape ISE) I/O port P1 TA/TD Terminator DECarray BC21R-5L (two tape I/O port P1...

  • Page 196: Dssi Vaxcluster Configurations

    B–16 DECarray Cabling Information B.2 DSSI VAXcluster Configurations This section contains cabling information for DECarray variations in the DSSI VAXcluster configuration. Note the following: • DSSI bus termination is supplied by the KFMSA modules installed in each host system. • All KFMSA modules installed in each host system must be set to the same DSSI ID.

  • Page 197: Cabling Sf7X In Decarray Dssi Vaxcluster Configurations

    DECarray Cabling Information B–17 Table B–2 Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: BE/BH DECarray BC21R-5L DECarray BC21R-5L I/O port P9 I/O port P1 CE/CH DECarray BC21R-5L Bottom BC21Q-3F...
  • Page 198 B–18 DECarray Cabling Information Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: FE/FH DECarray BC21R-5L Bottom BC21Q-3F (with one I/O port P9 connector tape ISE) of TF8x in position 5 DECarray...
  • Page 199 DECarray Cabling Information B–19 Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HE/HH DECarray BC21R-5L DECarray BC21R-5L (without I/O port P9 I/O port P1 tape ISE) DECarray BC21R-5L...
  • Page 200 B–20 DECarray Cabling Information Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HH/HH DECarray BC21R-5L Bottom BC21Q-3F (with two I/O port P9 connector tape ISEs) of TF8x in position 5 Bottom...
  • Page 201 DECarray Cabling Information B–21 Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HE/HH DECarray BC21R-5L DECarray BC21R-5L (plus SF7x, I/O port P9 I/O port P1 without tape ISE) DECarray...
  • Page 202 B–22 DECarray Cabling Information Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HE/HH DECarray BC21R-5L Bottom BC21Q-3F (plus SF7x, I/O port P9 connector with two of TF8x in tape ISEs) position 5...
  • Page 203 DECarray Cabling Information B–23 Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HE/HH DECarray BC21R-5L DECarray BC21R-5L (plus two I/O port P9 I/O port P1 SF7x, without tape ISE)
  • Page 204 B–24 DECarray Cabling Information Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HE/HH DECarray BC21R-5L Bottom BC21Q-3F (plus two I/O port P9 connector SF7x, with of TF8x in two tape position 5...
  • Page 205 DECarray Cabling Information B–25 Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JE/JH DECarray BC21R-5L DECarray BC21R-5L (without I/O port P9 I/O port P1 tape ISE) DECarray BC21R-5L...
  • Page 206 B–26 DECarray Cabling Information Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JE/JH DECarray BC21R-5L Bottom BC21Q-3F (with one I/O port P9 connector tape ISE) of TF8x in position 5 DECarray...
  • Page 207 DECarray Cabling Information B–27 Table B–2 (Continued) Cabling SF7x in DECarray DSSI VAXcluster Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JE/JH DECarray BC21R-5L Bottom BC21Q-3F (with two I/O port P9 connector tape ISEs) of TF8x in position 5 DECarray...

  • Page 208: Stripe Set Configurations With Sf7X Enclosures

    B–28 DECarray Cabling Information B.3 Stripe Set Configurations with SF7x Enclosures This section contains cabling information for DECarray stripe set configurations using SF7x enclosures. Note the following: • The SF7x storage enclosures must be operating in split-bus mode. • DSSI bus termination is supplied by the TTM module inside the SF7x storage enclosures.

  • Page 209: Cabling Sf3X In Decarray Through-Bus Configurations

    DECarray Cabling Information B–29 B.4 DECarray Configurations with SF3x Enclosures in Through-Bus Mode This section contains cabling information for DECarray variations containing SF3x enclosures in through-bus mode. Through-bus configurations are cabled the same way for both single- system and DSSI VAXcluster configurations. Table B–4 Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI...
  • Page 210 B–30 DECarray Cabling Information Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: CA/CD 1 rear Terminator DECarray BC21R-5L (without I/O port P9 tape ISE) 1 front Terminator DECarray BC21R-5L...
  • Page 211 DECarray Cabling Information B–31 Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: FA/FD 1 rear Terminator Bottom BC21Q-3F (with tape connector ISE) of TF8x in position 5 1 front Terminator...
  • Page 212 B–32 DECarray Cabling Information Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: HA/HD 1 rear Terminator Bottom BC21Q-3F (with tape connector ISE) of TF8x in position 5 1 front Terminator...
  • Page 213 DECarray Cabling Information B–33 Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD 1 rear Terminator DECarray BC21R-5L (without I/O port P9 tape ISE) 1 front Terminator DECarray BC21R-5L...
  • Page 214 B–34 DECarray Cabling Information Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD 1 rear Terminator Bottom BC21Q-3F (with one connector tape ISE) of TF8x in position 5 1 front Terminator...
  • Page 215 DECarray Cabling Information B–35 Table B–4 (Continued) Cabling SF3x in DECarray Through-Bus Configurations Right Left DSSI DSSI DECarray Position Connector Using Connector Using Variant Number Cable: Cable: JA/JD 1 rear Terminator Bottom BC21Q-3F (with two connector tape ISEs) of TF8x in position 5 1 front Terminator...

  • Page 216: Cabling Sf3X In Decarray Split-Bus Configurations

    B–36 DECarray Cabling Information B.5 DECarray Configurations with SF3x Enclosures in Split-Bus Mode This section contains cabling information for DECarray variations containing SF3x enclosures in split-bus mode. DSSI bus termination is accomplished by attaching a terminator (PN 12-28976-01) to the backplane connectors P9 & P10. Table B–5 Cabling SF3x in DECarray Split-Bus Configurations Right Left DSSI...

  • Page 217: Glossary

    Glossary A module that connects one or more device controllers to the ADAPTER system bus and hides many of the system bus requirements from the controller. The KFQSA module is an Q–bus to DSSI bus adapter. The KFMSA module is an XMI to DSSI bus adapter. A numerical value assigned to the ISE to indicate ALLOCATION CLASS which system(s) on a cluster it will be served by.
  • Page 218 Glossary–2 A adapter that connects one or more device EMBEDDED ADAPTER controllers to the system (such as a VAX 4000) bus and hides many of the system bus requirements from the controller. Refer to the system documentation for further information. Integrated storage element.
  • Page 219 Glossary–3 A mode of operation where the ISEs in the one side of a SPLIT-BUS storage enclosure are connected to a different DSSI bus than those on the other side. A set of disk drives operating in concert as a single STRIPE SET virtual disk so as to provide increased I/O performance.

  • Page 221: Index

    Index DECarray (cont’d) recommended environmental limits, 1–4 AC power cord removal and replacement, 4–1 removal and replacement, 5–29, removing doors, 4–1 6–43 verification, 3–5 AC power switch, 2–13 DECarray overview, 1–1 to 1–5 Disk ISE current parameters, 5–6, 6–5 drive module replaced, 6–20 Backplane fault codes, 3–11 removal and replacement, 5–27...
  • Page 222 2 Index Fault indicator, 5–41, 6–64 power supply, 2–13 Fault isolation, 3–2 DECarray, 3–5 DSSI bus meter (optional), 3–7 controls and indicators, 2–8 storage enclosure, 3–6 OCP cables troubleshooting chart, 3–8 removal and replacement, 6–53 Fault verification OCP to TM cable subsystem, 3–2 removal and replacement, 5–31 Front panel...
  • Page 223 Index 3 Transition module removal and replacement, 5–25 Transition-termination module removal and replacement, 6–35 Service guidelines, 2–19 Troubleshooting chart, 3–8 DECarray, 2–19 Troubleshooting checklist, 3–2 SF3x storage enclosure Troubleshooting procedures, 3–1 recommended environmental limits, 1–9 SF3x storage enclosures theory of operation, 2–2 SF7x storage enclosure Verification recommended environmental...

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