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Elite Disc Drive
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ST43401N/ND
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ST43402ND
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Reference Manual
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Related Manuals for Seagate Elite ST43401N/ND
Summary of Contents for Seagate Elite ST43401N/ND
- Page 1 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...
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Page 2: Table Of Contents
Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc. -
Page 3: Preface
• Ground yourself to the drive whenever the drive electronics are or will be exposed. Connect yourself to ground with a wrist strap (Seagate part number 12263496). Connection may be made to any grounded metal assembly. -
Page 4: Important Safety Information And Precautions
ST43401N/ND and ST43402ND Reference Manual, Rev. C Important safety information and precautions Caution. Use forced-air ventilation when bench-testing the drive to ensure proper cooling of drive components. Use proper safety and repair techniques for safe, reliable operation of this unit. Service should be done only by qualified persons. - Page 5 UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0805. Seagate takes all reasonable steps to ensure that its products are certifiable to currently accepted standards. Typical applications of these disc drives include customer packaging and subsystem design. Safety agencies condi- tionally certify component assemblies, such as the Elite disc drive, based on their final acceptability in the end-use product.
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Page 6: Technical Support Services
SeaFAX: USA (408) 438-2620; England 44-62-847-7080 Use a touch-tone telephone to access Seagate’s automated FAX system and select technical support information by return FAX. This service is available 24 hours a day, 7 days a week. - Page 7 ST43401N/ND and ST43402ND Reference Manual, Rev. C Location Telephone number USA, Mexico, Latin America (408) 438-8771 England 44-62-847-8011 Germany 49-89-140-9331 Singapore 65-292-6973 Australia 61-2-756-2359 Canada (416) 856-5581 France 33-1-40-67-1034 Korea 82-2-556-7294...
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Page 9: Section 1. General Maintenance Information
The procedures described in this section require the use of certain special tools, test equipment, and materials. These are listed below along with the Seagate part number. Note that the list includes only special tools. We assume that you have normal maintenance tools. - Page 10 ST43401N/ND and ST43402ND Reference Manual, Rev. C The following procedure provides an overall check of the DC voltages used by the drive. Before performing this procedure, you should be familiar with the other information in this section and the safety information in the preface. The illustration to the right shows where the individual voltages appear on the drive’s DC power connector (J15).
- Page 11 ST43401N/ND and ST43402ND Reference Manual, Rev. C Power Control Board Board Optional Bezel Option Jumpers and Spindle Sync Connector Option Jumpers Option Jumpers Option Jumpers Pin 1 Connector Chassis Head and Disc Assembly (HDA) DC Power Connector Figure 1. ST43401N/ND drive components...
- Page 12 ST43401N/ND and ST43402ND Reference Manual, Rev. C Power Control Board Board Optional Bezel Spindle Sync Connector Remote Operator Panel Connector I/O Board Power DC Power Connector Pin 1 Port B I/O Connector Chassis Option Head and Disc Jumpers Port B Assembly (HDA) Terminator Option...
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Page 13: Section 2. Planning The System
ST43401N/ND and ST43402ND Reference Manual, Rev. C Section 2. Planning the system This section supplements the installation instructions presented in the user’s manual (publication 83327720). To aid in configuring the drive for specific system requirements, the following subjects are discussed: •... - Page 14 ST43401N/ND and ST43402ND Reference Manual, Rev. C M4 x .70 Metric Threads (4) 6-32 Threads (4) Side C.G. Bottom 6-32 Threads (4) C.G. ± 3.25 0.01 82.55 ± 0.86 0.01 21.84 ± 0.39 0.01 9.91 ± 1.93 0.01 49.02 ± 3.120 0.005 79.25...
- Page 15 ST43401N/ND and ST43402ND Reference Manual, Rev. C M4 x .70 Metric Threads (4) 6-32 Threads (4) Side C.G. 6-32 Threads (4) C.G. Bottom P H G ± 146.05 5.75 0.01 ± 3.05 0.01 0.12 ± 1.52 0.06 0.02 ± 82.55 3.25 0.01 ±...
- Page 16 ST43401N/ND and ST43402ND Reference Manual, Rev. C Guidelines for proper air flow Your enclosure design must ensure adequate cooling for the drive. We recommend orienting the drive or directing the air flow in a way that creates the least amount of air-flow resistance while providing air flow above the circuit boards and around the head and disc assembly (HDA).
- Page 17 ST43401N/ND and ST43402ND Reference Manual, Rev. C Above unit Under unit Note. Air flows in the direction shown (front to back) or in reverse direction (back to front) Above unit Note. Air flows in the direction shown or Under unit in reverse direction (side to side) Figure 5.
- Page 18 ST43401N/ND and ST43402ND Reference Manual, Rev. C To evaluate the air-flow design, place the drive in its final mechanical position and perform random read and write operations. After the temperatures stabilize, measure the surface (case) temperatures of the components listed in the appropriate table below.
- Page 19 ST43401N/ND and ST43402ND Reference Manual, Rev. C Guidelines for I/O cabling This topic provides recommendations for I/O cabling and lists the parts that can be used in various cables. There are three general cabling schemes, as illustrated in the following figures: •...
- Page 20 ST43401N/ND and ST43402ND Reference Manual, Rev. C Drives and initiator in one cabinet Terminator 2 x 34 Pin Connector Drive 68 Conductor Flat Cable or Twisted Pair Drive Terminator Initiator Notes: 1. Cables and terminators shown are unshielded. 2. Flat cable can be used with single-ended drivers. Twisted-pair flat cable must be used with differential drivers.
- Page 21 ST43401N/ND and ST43402ND Reference Manual, Rev. C Drives and initiator in separate cabinets Unshielded Terminator Drive 2 x 34 Pin Drive Connector Drive Initiator Drive Flat Cable Terminator Twisted Pair Bulkhead Bulkhead Shielded Shielded Connector Connector Shielded Cabinet A Cabinet B Cable Notes: 1.
- Page 22 ST43401N/ND and ST43402ND Reference Manual, Rev. C Drives in separate cabinets Drive Drive Drive Drive Initiator ID 6 Initiator Drive Drive ID 5 Bulkhead Bulkhead Bulkhead Shielded Shielded Shielded Cable Shielded Cable Terminator Terminator Cabinet A Cabinet B Cabinet C Figure 9.
- Page 23 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 3 lists the parts needed to construct unshielded I/O cables. Table 4 lists part numbers and lengths of synchronized spindle cables. Table 5 provides part numbers of external terminators and resistor-pak terminators. ST43402ND (dual port) drives have both I/O connectors (one for Port A and the other for Port B) located on the I/O board.
- Page 24 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 4. Synchronized spindle cables Seagate Length part number 1.5 feet (0.46 meter) 70703929 3 feet (0.91 meter) 70703921 5 feet (1.52 meter) 70703922 7 feet (2.13 meter) 70703923 10 feet (3.05 meter) 70703924 20 feet (6.09 meter)
- Page 25 ST43401N/ND and ST43402ND Reference Manual, Rev. C Using the sweep cycle function The sweep cycle is a feature that periodically moves the heads to different locations on the discs during intervals when the drive is idle. The following are highlights of the sweep cycle function: •...
- Page 26 ST43401N/ND and ST43402ND Reference Manual, Rev. C Sweep Cycle Option ST43401N/ND Sweep Cycle Option ST43402ND Figure 10. Control board jumpers...
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Page 27: Section 3. Interface Functions
ST43401N/ND and ST43402ND Reference Manual, Rev. C Section 3. Interface functions This section provides an overview of the small computer system interface (SCSI) as it is used in the Elite drive. It is beyond the scope of this manual to provide a detailed description of all the features, capabilities, variations, and protocol of SCSI-2. - Page 28 ST43401N/ND and ST43402ND Reference Manual, Rev. C Initiator Target SCSI Bus Drive Host Embedded Host (logical Adaptor Controller unit) Initiator Target Drive Host Embedded Host (logical Adaptor Controller unit) To same or other SCSI units. Total must be 16 or less. Each device must have a unique SCSI ID, assigned by its SCSI ID bit.
- Page 29 ST43401N/ND and ST43402ND Reference Manual, Rev. C Data Bus Bits 0-15 (plus parity) Busy (BSY) Select (SEL) Reset (RST) Attention (ATN) Initiator Target Acknowledge (ACK) Request (REQ) Message (MSG) Input/Output (I/O) Control/Data (C/D) Figure 12. SCSI bus signal lines...
- Page 30 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 6. SCSI bus signal lines Signal Source Function Data Bus (DB 15–0+P) I–T Sixteen data-bit signals, plus a parity bit signal that form the Data Bus. DB(15) is the most- significant bit and has the highest priority dur- ing the Arbitration phase.
- Page 31 ST43401N/ND and ST43402ND Reference Manual, Rev. C I/O signal processing The following paragraphs describe the basic SCSI bus communication process. They describe the bus phases, a typical command sequence, command set, and message codes. The Request Sense command and the Receive Diagnostic Results command provide information to the initiator about drive functions.
- Page 32 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 8. SCSI bus phase descriptions Phase Description Bus Free No SCSI device asserts Busy or Select for at least one bus settle delay. Arbitration Allows one SCSI device to gain access to the bus based on its priority ID bit.
- Page 33 ST43401N/ND and ST43402ND Reference Manual, Rev. C SCSI command execution Figure 13 illustrates the basic flow of a command sequence. The sequence illustrated cannot and does not represent all variations. Refer to the SCSI Interface Specification for the Elite Product Family (document 64721702) for command descriptions, execution details, and timing constraints.
- Page 34 ST43401N/ND and ST43402ND Reference Manual, Rev. C The selected device responds to the initiator by entering the Message Out phase if the initiator has Attention asserted. In this phase, the target requests that the initiator send messages to it. The Message, Control/ Data, and Input/Output lines are used in combinations to indicate the various information transfer phases.
- Page 35 ST43401N/ND and ST43402ND Reference Manual, Rev. C At this point, the Message In phase is entered with a Disconnect message code. Following the disconnect, the bus is in the Bus Free phase in preparation for the Arbitration and Reselection phases. After Reselection, the process continues with the Message In and Data In phases previously described.
- Page 36 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 9. Command set Group 0 commands for direct access devices Op code Command name Test Unit Ready Rezero Unit Request Sense Format Unit 05–06 Reassign Blocks Read Write Seek 0C–10 Port Status (0 dual port only) Inquiry 13–14 Mode Select...
- Page 37 ST43401N/ND and ST43402ND Reference Manual, Rev. C continued from previous page Group 1 and 2 Commands for Direct Access Devices Op Code Command Name 20–24 Read Capacity 26–27 Read Extended Write Extended Seek Extended 2C–2D Write and Verify Verify 30–36 Read Defect Data 38–3A Write Buffer...
- Page 38 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 10. Message code descriptions Code (Hex) Initiator Target Description Direction of Transfer Command complete Target ------> Initiator 01//00 Modify data pointer Target ------> Initiator 01//01 Sync data transfer request Target <-----> Initiator Save data pointer Target ------>...
- Page 39 ST43401N/ND and ST43402ND Reference Manual, Rev. C continued from previous page Bit 7 = 1: Indicates an Identify message Bit 6 = 1: Indicates the initiator allows disconnection and reselection Bit 6 = 0: Indicates that disconnection is not allowed Bit 5 = 0: Indicates the I/O is directed to or from a logical unit Bit 5 = 1:...
- Page 40 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 11. Status codes Status Byte: Byte RESVD RESVD <<---------- Status Byte Code ---------->> RESVD Status Byte Codes: Bits of the Status Byte* Status Description Good Check condition Condition met Busy Intermediate Intermediate-condition met Reservation conflict Command terminated Queue full...
- Page 41 ST43401N/ND and ST43402ND Reference Manual, Rev. C The Request Sense command The Request Sense command (03H) requests that the target transfer sense data to the initiator. This data is returned in the extended sense format. Within this format are the following three levels of information: •...
- Page 42 ST43401N/ND and ST43402ND Reference Manual, Rev. C Table 13. Additional sense codes and their qualifiers Byte 12 Byte 13 Description No additional sense information No index/sector signal No seek complete Peripheral device write fault Logical unit not ready—cause not reportable Logical unit is in process of becoming ready Logical unit not ready—initializing command required Logical unit not ready—mutual intervention required...
- Page 43 ST43401N/ND and ST43402ND Reference Manual, Rev. C continued from previous page Byte 12 Byte 13 Description Recovered data with positive head offset Recovered data with negative head offset Recovered data with previous sector ID Recovered data without ECC—data auto-reallocated Recovered data with error correction applied Recovered data with error correction and retries applied Recovered data with ECC and/or retries—data auto-reallocated Defect list error...
- Page 44 ST43401N/ND and ST43402ND Reference Manual, Rev. C continued from previous page Byte 12 Byte 13 Description Commands cleared by another initiator Cannot read medium—unknown format Cannot read medium—incompatible format Medium format corrupted Format command failed No defect spare location available Defect list update failure Rounded parameter Saving parameters not supported...
- Page 45 ST43401N/ND and ST43402ND Reference Manual, Rev. C continued from previous page Byte 12 Byte 13 Description Operator selected write permit Log exception Threshold condition met Log counter at maximum Log list codes exhausted RPL status change Spindles synchronized Spindles not synchronized Additional Sense Codes in the range of 80H–FFH are vendor unique Additional Sense Code Qualifiers in the range of 80H–FFH...
- Page 46 ST43401N/ND and ST43402ND Reference Manual, Rev. C Field replaceable unit (FRU) code In the event of a failure, the FRU code byte identifies the assembly that may have failed. The codes are listed in probability order with the most probable assembly listed first and the least probable listed last.
- Page 47 ST43401N/ND and ST43402ND Reference Manual, Rev. C Error code This two-byte value provides information about what part of the diagnostic operation has failed. The error codes are shown in Table 16. Table 16. Error codes Code Description 0001H Formatter diagnostic error 0002H Microprocessor RAM diagnostic error 0004H...
- Page 48 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83327730, Rev. C, Printed in USA...