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Seagate ST34371N - Barracuda 4.3 GB Hard Drive Product Manual

Barracuda 4lp series
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Enlarged version
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Barracuda 4LP Family:
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ST34371N/W/WD/WC/DC
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ST32171N/W/WD/WC/DC
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ST34571N/W/WD/WC/DC
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ST32271N/W/WD/WC/DC
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Product Manual, Volume 1
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Summary of Contents for Seagate ST34371N - Barracuda 4.3 GB Hard Drive

  • Page 1 ..........Barracuda 4LP Family: .
  • Page 3 ..........Barracuda 4LP Family: .
  • Page 4 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 of Seagate Technol- ogy, Inc.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 11/18/96 D. Ashby/B. Norman Rev. B 06/09/97 D. Ashby/B. Norman 3, 4, 5, 7, 8, 10, 11, 15, 17, 19, 24, 31, 33, 34, 36, 45, 53, 56, 57, 67, 68, 71, 72, 73, 75 and 76.

  • Page 7: Table Of Contents

    Barracuda 4LP Product Manual, Rev. D Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate technical support services ........
  • Page 9 Barracuda 4LP Product Manual, Rev. D Figures Figure 1. Barracuda 4LP family drive ........... 1 Figure 2.

  • Page 11: Scope

    Barracuda 4LP Product Manual, Rev. D Scope This manual describes the Seagate Technology®, Inc. Barracuda 4LP™ disc drives. Barracuda 4LP drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20) interface specifications to the extent described in this manual. The SCSI Inter- face Product Manual (part number 77738479) described general SCSI interface characteristics of this and other families of Seagate drives.

  • Page 13: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Barracuda 4LP Family complies with Seagate standards as noted in the appropriate sections of this Man- ual and the Seagate SCSI Interface Manual, part number 77738479 (Vol. 2).

  • Page 14: Reference Documents

    X3T10/1071D rev. 6 Fast-20 (also called “Ultra SCSI”) SFF-8046 Specification for 80-pin SCA connector for SCSI Disk Drives Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001 In case of conflict between this document and any referenced document, this document takes precedence.

  • Page 15: General Description

    (volume 1), which defines the product performance char- acteristics of the Barracuda 4LP family of drives, and the SCSI Interface Product Manual (volume 2), part num- ber 77738479, which describes the general interface characteristics of this and other families of Seagate SCSI drives.

  • Page 16: Figure 2. Barracuda 4Lp Family Drive

    Barracuda 4LP Product Manual, Rev. D The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used). The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non- replaceable filter to maintain a contamination-free HDA environment.

  • Page 17: Standard Features

    Barracuda 4LP Product Manual, Rev. D Standard features The Barracuda 4LP Family has the following standard features: • Integrated SCSI controller • Single-ended or differential SCSI drivers and receivers • 8 bit and 16 bit I/O data bus models available •...

  • Page 18: Unformatted And Formatted Capacities

    Barracuda 4LP Product Manual, Rev. D Unformatted and formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model capacities: Formatted [1] Data Block Size 512 Byte/Sector Unformatted ST34371...

  • Page 19: Performance Characteristics

    Barracuda 4LP Product Manual, Rev. D Performance characteristics Internal drive characteristics (transparent to user) ST34371 ST32171 ST34571 ST32271 Drive Capacity 5.31 2.65 5.54 2.77 GByte (UNF, rounded off values) Read/Write Heads Bytes/Track 102,500 102,500 106,980 106,980 Bytes (Avg, rounded off values) Bytes/Surface Mbytes (UNF, rounded off values) Tracks/Surface, Total...

  • Page 20: Format Command Execution Time (Minutes)

    Barracuda 4LP Product Manual, Rev. D 4.2.2 Format command execution time (minutes) [1]* ST34371/ST34571 ST32171/ST32271 Maximum (with verify) Maximum (no verify) 4.2.3 Generalized performance characteristics Minimum sector interleave 1 to 1 Data buffer transfer rate to/from disc media (one 512-byte sector): Min.

  • Page 21: Start/Stop Time

    Barracuda 4LP Product Manual, Rev. D Notes for Section 4.2. Execution time measured from receipt of the last Byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). Maximum times are specified over the worst case conditions of temperature, voltage margins and drive orientation.

  • Page 22: Caching Write Data

    Barracuda 4LP Product Manual, Rev. D The following is a simplified description of a read operation with cache operation enabled: Case A - A Read command is received and the first logical block (LB) is already in cache: 1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already in the cache.
  • Page 23 Barracuda 4LP Product Manual, Rev. D During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if the Discontinuity (DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h. Whenever prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA (Adaptive Read Look-Ahead).

  • Page 25: Reliability Specifications

    Barracuda 4LP Product Manual, Rev. D Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4). Seek Errors Less than 10 in 10 seeks Read Error Rates [1] Recovered Data...

  • Page 26: Seek Errors

    Barracuda 4LP Product Manual, Rev. D 5.1.4 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. There shall be no more than one recoverable seek errors in 10 physical seek operations.

  • Page 27: Hot Plugging Barracuda 4Lp Disc Drives

    Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure. Seagate will pay for transporting the repair or replacement item to customer.
  • Page 28 Barracuda 4LP Product Manual, Rev. D Product repair and return information Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory-seal voids...

  • Page 29: Physical/Electrical Specifications

    Barracuda 4LP Product Manual, Rev. D Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Barracuda 4LP drive. AC power requirements None DC power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector.

  • Page 30: Conducted Noise Immunity

    Barracuda 4LP Product Manual, Rev. D 6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 mHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power con- nector.

  • Page 31: Power Dissipation

    PCB mounted integrated circuit case. b. Non-Operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive.

  • Page 32: Relative Humidity

    Barracuda 4LP Product Manual, Rev. D Model “WC/DC” PCB HDA Temp. Check Point PCB 3 Model “W/WD” PCB Model “N” PCB PCB 1 PCB 2 Bottom side of PCB Figure 4. Locations of PCB components listed in Table 3 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs.

  • Page 33: Effective Altitude (Sea Level)

    Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).

  • Page 34: Figure 5. Recommended Mounting

    Barracuda 4LP Product Manual, Rev. D Note. Use four screws (two per side) when using the mounting holes located on the sides of the drive. See Section 8.4 when using the mounting holes located on the bottom of the drive. Figure 5.

  • Page 35: Air Cleanliness

    Air cleanliness The drive is designed to operate in a typical office environment with minimal environmental control. 6.4.6 Acoustics Sound power during idle mode shall be 4.2 bels typical when measured to Seagate’s 30553-001 specification. 6.4.7 Electromagnetic susceptibility See Section 2.1.1.1.

  • Page 36: Mechanical Specifications

    Barracuda 4LP Product Manual, Rev. D Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 6a, 6b, and 6c for detailed mounting configuration dimensions.

  • Page 37: Figure 6B. Mounting Configuration Dimensions For Models "W" And "Wd

    Barracuda 4LP Product Manual, Rev. D Notes: Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm). Mounting holes four on bottom, 6-32 UNC.

  • Page 38: Figure 6C. Mounting Configuration Dimensions For Models "Wc" And "Dc

    Barracuda 4LP Product Manual, Rev. D Notes: Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm).

  • Page 39: Defect And Error Management

    Barracuda 4LP Product Manual, Rev. D Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator). Defect and error management in the SCSI system involves the drive internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and the drive).

  • Page 41: Installation

    J2, J1-Auxiliary and J6. Suggested part number for the jumpers used on J1-Auxiliary and J6 are Methos Elec- tronics 861M-202-70 (Seagate P/N 15481851). Suggested part number for the jumpers used on J2 is Molex 52747-0211(Seagate P/N 77679052). A bag with the two jumper plug types is shipped with the standard OEM drives.

  • Page 42: Figure 7A. Barracuda 4Lp Family Drive Id Select Header For Models "N

    Barracuda 4LP Product Manual, Rev. D Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6...

  • Page 43: Figure 7B. Barracuda 4Lp Family Drive Id Select For Models "W," "Wc," "Wd," And "Dc

    Barracuda 4LP Product Manual, Rev. D Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6...

  • Page 44: Figure 7C. Barracuda 4Lp Family Drive Id Select Header J1-Auxiliary For Models "W" And "Wd" (J1-Auxiliary Pins 1A - 12A)

    Barracuda 4LP Product Manual, Rev. D Drive HDA (rear view, PCB facing downward) J1-Auxiliary [1] [2] Pin 1 +5V Ground Pin 1A J1-DC Power Pin 12A 68 Pin SCSI ID = 0 (default) SCSI I/O Connector SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4...

  • Page 45: Figure 7D. Barracuda 4Lp Family Drive Option Select Header For Models "N," "W," And "Wd

    Barracuda 4LP Product Manual, Rev. D Pin 1 Jumper Caution: Positions (default - models Terminator Enable Do not use J2 jumper “N” and “W” only) plugs on J6 or J1- Delay Motor Start Auxiliary, as the internal Enable Motor Start contacts will be deformed and can not be used on Write Protect...

  • Page 46: Notes For Figures 7A, 7B, 7C, 7D, And 7E

    Barracuda 4LP Product Manual, Rev. D 8.1.1 Notes for Figures 7a, 7b, 7c, 7d, and 7e. Notes explaining the functions of the various jumpers on jumper header connectors J2, J1-Auxiliary and J6 are given here and in Section 8.1.2. The term “default” means as standard OEM units are configured with a jumper on those positions when shipped from factory.
  • Page 47 Barracuda 4LP Product Manual, Rev. D Table 4: Drive configuration selections summary Connector Interface Applicable Type Function J1-AUX Figure Drive ID X, Y none Drive Activity LED Y [c] none Option select none W, WD Drive ID X, Y X, Y [e] 7b, 7c [a] W, WD Drive Activity LED...

  • Page 48: Function Description

    Barracuda 4LP Product Manual, Rev. D 8.1.2 Function description Jumper Installation Jumper Function Description (Applies only to “N” and “W” models) With the jumper installed, the On-board (non-removable) terminator circuits are enabled (connected to the I/O lines). Default is jumper installed. Terminator circuits not enabled (not connected to I/O lines).

  • Page 49: Drive Orientation

    Barracuda 4LP Product Manual, Rev. D Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor- mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations.

  • Page 50: Drive Mounting

    Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech- nology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame.

  • Page 51: Interface Requirements

    This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements /implementation is described in the Seagate SCSI Interface Product Manual, P/N 77738479. This section has tables that give the Barracuda 4LP Family drive's version of the SCSI imple- mentation described in the SCSI Interface Product Manual.

  • Page 52: Scsi Interface Commands Supported

    Barracuda 4LP Product Manual, Rev. D SCSI interface commands supported Table 6 following lists the SCSI interface commands that are supported in the SCSI-2, and SCSI-3 modes of the drive. Barracuda 4LP Family drives can be changed back and forth between SCSI-1 and SCSI-2/SCSI-3 modes using the Change Definition Command.
  • Page 53 Barracuda 4LP Product Manual, Rev. D Table 6: Commands supported by Barracuda 4LP family drive (Continued) Command Supported by Command Name Code SCSI-2/3 Mode sense Y [2] Caching parameters page (08h) Control mode page (0Ah) Disconnect/reconnect (02h) (DTDC, DIMM not used) Error recovery page (01h) Format page (03h) Information exceptions control page (1Ch)
  • Page 54 Barracuda 4LP Product Manual, Rev. D Table 6: Commands supported by Barracuda 4LP family drive (Continued) Command Supported by Command Name Code SCSI-2/3 Seek extended Send diagnostics Supported diagnostics pages (00h) Translate page (40h) Set limits Start unit/stop unit (spindle ceases rotating) (1CH) Synchronize cache Test unit ready Verify...

  • Page 55: Inquiry Vital Product Data

    Barracuda 4LP Product Manual, Rev. D Table 7 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI-2 Interface Product Manual P/N 77738479, section 5.1.1.3. Table 7: Barracuda 4LP family drive Standard Inquiry data Bytes Data (HEX) 0-15...

  • Page 56: Mode Sense Data

    Barracuda 4LP Product Manual, Rev. D 9.3.2 Mode Sense data The Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Change- able values.
  • Page 57 Barracuda 4LP Product Manual, Rev. D The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com- mand pages for SCSI-2/SCSI-3 implementation (see SCSI Interface Product Manual, P/N 77738479). Definitions: = Saved value = Default value.
  • Page 58 Barracuda 4LP Product Manual, Rev. D Table 8b: Mode sense data, ST32171 default values (SCSI-2/3 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode 87 00 10 08 Sense...
  • Page 59 Barracuda 4LP Product Manual, Rev. D Table 9a: Mode sense data, ST34571 default values (SCSI-2/3 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode 87 00 10 08 Sense...
  • Page 60 Barracuda 4LP Product Manual, Rev. D Table 9b: Mode sense data, ST32271 default values (SCSI-2/3 implementation) Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode 87 00 10 08 Sense...

  • Page 61: Scsi Bus Conditions And Miscellaneous Features Supported

    Barracuda 4LP Product Manual, Rev. D SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here.

  • Page 62: Synchronous Data Transfer

    Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual, P/N 77738479. This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface.

  • Page 63: Figure 9A. Physical Interface For "N" Model Drives

    Barracuda 4LP Product Manual, Rev. D Power +12V +12V ret + 5V ret + 5V DC Power Pin 1 Connector Pin 1 SCSI I/O Connector Figure 9a. Physical interface for “N” model drives...

  • Page 64: Figure 9B. Model "W" And "Wd" Drive Physical Interface (68 Pin J1 Scsi I/O Connector)

    Barracuda 4LP Product Manual, Rev. D Power +12V +12V ret + 5V ret + 5V J1-Auxiliary Pin 1 Pin 1A J1-DC Power J1-DC Power J1-Auxiliary Pin 1P Pin 1A Pin 1 68 Pin SCSI I/O Connector Figure 9b. Model “W” and “WD” drive physical interface (68 pin J1 SCSI I/O connector) 80 Pin SCSI I/O and Power Connector...

  • Page 65: Scsi Interface Physical Description

    Barracuda 4LP Product Manual, Rev. D 9.6.2 SCSI Interface physical description The drives may be daisy chained together or with other compatible SCSI devices. Both ends of the cable must be terminated. The “N,” “W,” and “WC” model drives implement single-ended drivers and receivers. All signals are common between all SCSI devices.

  • Page 66: Mating Connectors

    Barracuda 4LP Product Manual, Rev. D 9.6.3.1 Single-ended I/O circuits (“N” and “W” models) The maximum total cable length allowed with drives having single-ended I/O driver and receiver circuits depends on several factors. Table 12 lists the maximum lengths allowed for different configurations of drive usage.
  • Page 67 Barracuda 4LP Product Manual, Rev. D 9.6.4.1 Mating connectors for “N” models The nonshielded cable connector shall be a 50 conductor connector consisting of two rows of 25 female con- tacts with adjacent contacts .100 inch apart. Recommended mating flat cable connector part numbers are: Closed end 3M-3425-7000 W/O Strain Relief, No Center Key...

  • Page 68: Figure 10. Scsi Daisy-Chain Interface Cabling For "N," "W," And "Wd" Model Drives

    Barracuda 4LP Product Manual, Rev. D Recommended mating 80-position PCB mount connectors: Straight-in connector Hot Plug version (with ground guide-pin) Seagate P/N: 77678703 Amp US P/N: 2-557103-1 787311-1 with polarization 94-0680-02-1 Amp US P/N: 2-557103-2 787311-2 without polarization 94-0680-02-2 Amp Japan P/N: 5-175475-9...

  • Page 69: Figure 11A. Nonshielded 50 Pin Scsi Device Connector Used On "N" Models

    Barracuda 4LP Product Manual, Rev. D .370 .010 (9.398) Ref. (15.24) (10.67) Typ. (5.08) .065 x 45 Chamfer Typ. (1.65) Pin 49 Pin 1 .037 Ref. Typ. Typ. (.94) (6.60) .335 .010 (8.50) .100 (2.54) .025 +.001 Sq. Contact –.002 Dia. .083 Pin 50 (.64)

  • Page 70: Figure 11B. Nonshielded 68 Pin Scsi Device Connector Used On "W" And "Wd" Models

    Barracuda 4LP Product Manual, Rev. D 3.650 .005 .346 .270 . 1 55 1.650 .3937 .600 .050 .0787 .200 .022 .020 .047 (15.24) .519 (13.18) (5.08) .100 Pos. 1.816 .315 .085 (2.54) (46.13) Pos. Position 1 x 45 chamfer (8.00) (2.16) .315 .010...

  • Page 71: Figure 11C. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On "Wc" And "Dc" Models

    Barracuda 4LP Product Manual, Rev. D 7.00 (.276) 12.70 End View (.500) Grounding Pins 57.87 0.20 (2.278 0.008) 51.17 0.10 (2.251 0.004) 0.15 M Y M (.006) C L of Datum Y –Y– Front View Pin 1 62.15 0.15 (2.447) ( .006) 0.15 M Y M...
  • Page 72 Barracuda 4LP Product Manual, Rev. D Table 13a: Model “N,” single ended I/O, 50 conductor, signal/contact assignments Connector Cable Connector Signal contact conductor contact Signal name [1] number [12] number [11] number [12] name [1] –DB0 –DB1 –DB2 –DB3 –DB4 –DB5 –DB6 –DB7...
  • Page 73 Barracuda 4LP Product Manual, Rev. D Table 13b: “W” models single ended I/O cable 68 conductor signal/contact assignments Connector Cable Connector Signal Contact Conductor Contact Signal Name [1] Number [3] Number [2] Number [3] Name [1] –DB12 –DB13 –DB14 –DB15 –DBP1 –DB0 –DB1...
  • Page 74 Barracuda 4LP Product Manual, Rev. D Table 13c: “WD” models differential cable 68 conductor signal/pin assignments (Nonshielded connector)[13] Note. The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for logic signals. Connector Cable Connector...
  • Page 75 Barracuda 4LP Product Manual, Rev. D Table 13d: “WC” models single ended I/O, 80 conductor cable signal/contact assignments Connector Signal Contact Signal Contact Name [1] Number [3] Number [3] Name[1] 12 V CHARGE 12 V GND 12 V 12 V GND 12 V 12 V GND 12 V...
  • Page 76 Barracuda 4LP Product Manual, Rev. D Table 13e: “DC” differential models, 80 pin I/O connector pin assignments (Nonshielded connector) [13] Connector Signal Contact Signal Contact Name [1] Number [3] Number [3] Name[1] 12 V CHARGE 12 V GND 12 V 12 V GND 12 V 12 V GND...
  • Page 77 Barracuda 4LP Product Manual, Rev. D Notes [ ] for Tables 13a through 13e. See Section 9.7.1 or 9.6.4.2 for detailed electrical characteristics of these signals. The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable.

  • Page 78: Electrical Description

    Barracuda 4LP Product Manual, Rev. D Electrical description “N” and “W” models use single-ended interface signals. These signals must be terminated with 110-ohm active termination circuits at each end of the total cable. Single-ended circuits use open collector or three state driv- ers.

  • Page 79: Differential Drivers/Receivers

    Barracuda 4LP Product Manual, Rev. D 9.7.2 Differential drivers/receivers Differential drivers and receivers are used by the “WD,” and “DC” models. Typical circuits are shown in Figure 13. The drive has no provisions for terminator circuits on differential I/O drives. Differential Signals All differential interface signals consist of two lines denoted +SIGNAL and –SIGNAL.

  • Page 80: Figure 13. Typical Differential I/O Line Transmitter/Receiver And External Terminators

    See Section 9.7.2 for signal characteristics. I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must be provided external to the drive by user, systems integrator or host equipment manufacturer where needed.

  • Page 81: Terminator Requirements

    Barracuda 4LP Product Manual, Rev. D Terminator requirements Internal disc drive I/O termination (provided only in model “N” and “W” drives single ended I/O model drives) consists of active circuits in an LSI module that is permanently mounted on the PCB. All single initiator/single target (non-daisy-chain) applications require that the Initiator and disc drive be terminated.

  • Page 82: Disc Drive Scsi Timing

    Barracuda 4LP Product Manual, Rev. D 9.10 Disc drive SCSI timing Table 14: Disc drive SCSI timing Waveform Waveform Description Symbol [1] Table [1] Typical Timing Target Select Time (no Arbitration) [4] <2 s Target Select Time (with Arbitration) [4] 4.5-1,2 <2 s Target Select to Command...
  • Page 83 Barracuda 4LP Product Manual, Rev. D Table 14: Disc drive SCSI timing (Continued) Waveform Waveform Description Symbol [1] Table [1] Typical Timing Data In Byte Transfer (parameter) 4.5-12 0.04 s Data Out Byte Transfer (parameter) 4.5-13 0.04 s Next Data In Byte Access (parameter) 4.5-12 0.12 s Next Data Out Byte Access (parameter)

  • Page 85: Seagate Technical Support Services

    Online technical support for Seagate products is available on CompuServe. To access our technical support forum, type go seagate . This forum provides information similar to that found on SeaBOARD. In addition, you can type questions or browse through previous questions and answers on the forum messages.
  • Page 86 . (Central time) Monday through Friday. Customer service centers Seagate direct OEM, Distribution, and Systems Integrator customers should contact their Seagate service rep- resentative for warranty information. Other customers should contact their place of purchase. Seagate offers comprehensive customer support for all Seagate drives. These services are available worldwide.
  • Page 87 Barracuda 4LP Product Manual, Rev. D Index bulkhead connector 55 bus device reset message 46 bytes per sector 44 Symbols bytes/surface 9 bytes/track 9 +5 and +12 volt supplies 19 Numerics cabinet cooling 39 50 conductor connector 57 cable 52 50 conductor flat cable 55 shielded 55 50 pin connector 58...
  • Page 88 Barracuda 4LP Product Manual, Rev. D current requirements 19 drive defects list track 29 current value 46 drive failure 16 cylinder boundary 13 drive firmware 46 drive ID 31 drive ID select 32 drive ID select jumper connector 31 daisy-chain 20 drive ID/option select header 31 80 conductor 57 drive interface connector 57...
  • Page 89 Barracuda 4LP Product Manual, Rev. D Fast-20 SCSI 5 I/O termination 71 fault status 15 identified defect 29 FCC rules and regulations 3 idle condition 21 field repair 16 impedance match/mismatch 55 firmware 46 initiator flat ribbon cable 67 termination 71 flaw reallocation 10 inquiry command 45 format 44...
  • Page 90 Barracuda 4LP Product Manual, Rev. D medium error 16 orientation 11 message protocol 52 out-of-plane deflection 40 message protocol system 29 out-of-plane distortion 40 messages output voltage 68 SCSI interface 41 overhead time 10 miscellaneous features 51 mode page 01 46 mode page 08h 11 package size 23 mode parameter 46...
  • Page 91 SCSI-2/SCSI-3 47 read error rate 15 SCSI-2/SCSI-3 mode 42 read operation 11 SCSI-3 (Fast-20) interface 5 read power dissipation 21 Seagate support service 31 read/write head 9 sector 12 ready 46 sector interleave 10 receive diagnostic results 29 sector size 8...
  • Page 92 Barracuda 4LP Product Manual, Rev. D standards 3 start motor command 19 Ultra SCSI 5 start unit command 38 unformatted 8 start/stop time 11 unrecoverable condition 15 status 29 unrecoverable error 15 STIR algorithm 7 unrecoverable seek error 16 stop spindle 11 unrecoverable write error 15 stop time 11 unshielded cable 55...
  • Page 94 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 77767491, Rev. D, Printed in USA...

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