Seagate ST150176LW Product Manual
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Seagate ST150176LW Product Manual

Seagate ST150176LW Product Manual

Barracuda 50 family
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Barracuda 50 Family:
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ST150176LW/LC
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Product Manual, Volume 1
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Summary of Contents for Seagate ST150176LW

  • Page 1 ..........ST150176LW/LC .
  • Page 3 ..........ST150176LW/LC .
  • Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Barracuda, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trademarks or registered trade- marks of Seagate Technology, Inc. or one of its subsidiaries. All other trademarks or registered trade- marks are the property of their respective owners.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 02/24/99 L. Newman/D. Rusch 1/1, v thru viii, 1-82 Class A Release Rev. B 05/15/99 L. Newman/D. Rusch Pages 7, 8, 9, 11, 25, 49 and 53. ECO: DJD51089 Rev.

  • Page 7: Table Of Contents

    Barracuda 50 Product Manual, Rev. C Table of Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate Technology support services........
  • Page 9 Barracuda 50 Product Manual, Rev. C List of Figures Figure 1. Barracuda 50 family drive........... . . 1 Figure 2.

  • Page 11: Scope

    Barracuda 50 Product Manual, Rev. C Scope This manual describes the Seagate Technology®, Inc. Barracuda 50™ disc drives. Barracuda 50 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20 and Fast-40) interface specifications to the extent described in this manual. The SCSI Interface Product Manual (part number 77738479) describes 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 50 family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual, part number 77738479 (Vol. 2).

  • Page 14: Reference Documents

    X3T10/1143D SFF-8046 Specification for 80-pin connector for SCSI disk drives SCA-2 EIA Specification ANSI/EIA 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...

  • Page 15: General Description

    Barracuda 50 family of drives, and the SCSI Interface Product Manual (volume 2), part number 77738479, which describes the general interface characteristics of this and other families of Seagate SCSI drives. 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).

  • Page 16: Figure 2. Barracuda 50 Family Drive

    Barracuda 50 Product Manual, Rev. C Figure 2. Barracuda 50 family drive...

  • Page 17: Standard Features

    Barracuda 50 Product Manual, Rev. C Standard features The Barracuda 50 family has the following standard features: • Integrated SCSI controller • Multimode SCSI single-ended or low voltage differential drivers and receivers • 16 bit I/O data bus • Asynchronous and synchronous data transfer protocol •...

  • Page 18: Unformatted And Formatted Capacities

    Barracuda 50 Product Manual, Rev. C 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 data. Formatted data block size 512 bytes/sector [1] Unformatted ST150176...

  • Page 19: Performance Characteristics

    Barracuda 50 Product Manual, Rev. C Performance characteristics Internal drive characteristics (transparent to user) ST150176 Drive capacity 50.07 GByte (formatted, rounded off values) Read/write heads Bytes/track 189.28 kbytes (average, rounded off values) Bytes/surface 2,276 Mbytes (unformatted, rounded off values) Tracks/surface (total) 12,024 Tracks (user accessible) Tracks/inch...

  • Page 20: Start/Stop Time

    Barracuda 50 Product Manual, Rev. C SCSI interface data transfer rate (asynchronous) [5]: Maximum instantaneous 6.0 Mbytes/sec [6] Maximum average 6.0 Mbytes/sec [7] Synchronous transfer rate for SCSI Fast-20 (Ultra-1 SCSI): 40 Mbytes/sec Synchronous transfer rate for SCSI Fast-40 (Ultra-2 SCSI): 80 Mbytes/sec Synchronous transfer rate for fast SCSI-2: 20 Mbytes/sec...

  • Page 21: Prefetch/Multi-Segmented Cache Control

    Barracuda 50 Product Manual, Rev. C Prefetch/multi-segmented cache control The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when it is used in “cache”...

  • Page 22: Caching Write Data

    Barracuda 50 Product Manual, Rev. C 4.5.1 Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored in one or more segments while the drive performs the write command. If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made avail- able for future read cache hits.

  • Page 23: Reliability Specifications

    Barracuda 50 Product Manual, Rev. C 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 24: Seek Errors

    Barracuda 50 Product Manual, Rev. C 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 ten recoverable seek errors in 10 physical seek operations.

  • Page 25: Service Life

    Case 4 Current I/O process allowed during insertion or removal, except on the device being changed Seagate Barracuda disc drives support four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus.

  • Page 26: S.m.a.r.t

    Barracuda 50 Product Manual, Rev. C 5.2.8 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to allow data back-up before an actual failure occurs.

  • Page 27: Product Warranty

    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 29: Physical/Electrical Specifications

    Barracuda 50 Product Manual, Rev. C Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Barracuda 50 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 50 Product Manual, Rev. C 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

    Barracuda 50 Product Manual, Rev. C +5 Volt Current during spindle start – Typical Amperes Current (amps) Component Nominal (average) DC curve T T0 T2 T2 T2 Seconds Figure 4. Typical Barracuda 50 family drive +5 V current profile Power dissipation For drives using single-ended interface circuits, typical power dissipation under idle conditions is 11.82 watts (40.3 BTUs per hour).

  • Page 32: Environmental Limits

    Barracuda 50 Product Manual, Rev. C 1.600 5V A 12V A 1.400 Watts 1.200 1.000 0.800 Watts 0.600 0.400 0.200 I/Os per Second Figure 5. DC current and power vs. input/output operations per second (SE mode) 1.600 5V A 12V A 1.400 Watts 1.200...

  • Page 33: Temperature

    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 34: Figure 7. Locations Of Pcb Components Listed In Table 3

    Barracuda 50 Product Manual, Rev. C HDA Temp. Check Point Model “LC” PCBA Model “LW” PCBA Figure 7. Locations of PCB components listed in Table 3...

  • Page 35: Relative Humidity

    Barracuda 50 Product Manual, Rev. C 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour. b. Non-operating 5% to 95% non-condensing relative humidity. 6.4.3 Effective altitude (sea level) a.

  • Page 36: Figure 8. Recommended Mounting

    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 37: 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 4.0 bels typical when measured to Seagate’s 30553-001 specification. 6.4.7 Electromagnetic susceptibility See Section 2.1.2.

  • Page 38: Mechanical Specifications

    Barracuda 50 Product Manual, Rev. C 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 9 and 10 for detailed mounting configuration dimensions.

  • Page 39: Figure 10. Mounting Configuration Dimensions For "Lc" Model

    Barracuda 50 Product Manual, Rev. C Notes: -Z- -X- Mounting holes are 6-32 UNC 2B, three on each side and four on the bottom. Max screw penetration into side of drive is 0.15 in. (3.81 mm). Max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in.

  • Page 41: Defect And Error Management

    Barracuda 50 Product Manual, Rev. C 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 42: Scsi Systems Errors

    Barracuda 50 Product Manual, Rev. C Table 4: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per Write retry Maximum recovery time per count LBA (cumulative, msec) count LBA (cumulative, msec) 108.7 50.2 125.4 75.2 426.4 83.6...

  • Page 43: Installation

    • Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary see Section 10 for Seagate support services telephone numbers. • Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as the manufacturer labels contain information required when servicing the product.

  • Page 44: Figure 11. Barracuda 50 Family Drive Id Select For Models "Lw" And "Lc

    Barracuda 50 Product Manual, Rev. C 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 45: Figure 12. Barracuda 50 Family Drive Id Select Header J5 For "Lw" Model (J5 Pins 1A - 12A)

    Barracuda 50 Product Manual, Rev. C Drive HDA (rear view, PCB facing downward) [1] [2] Pin 1 +5V Ground Pin 1 J1-DC Power 68 Pin SCSI ID = 0 (default) SCSI I/O Connector SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5...

  • Page 46: Notes For Figures 11, 12, And 13

    Barracuda 50 Product Manual, Rev. C Pin 1 Jumper Positions Force single-ended bus mode Delay Motor Start Enable Remote Motor Start Write Protect Parity Disable Reserved Additional notes on these (applies to “LW” model only; Term. Power to SCSI Bus functions in section 8.1.2.

  • Page 47: Function Description

    Barracuda 50 Product Manual, Rev. C 8.1.2 Function description jumper installation Jumper function description Forces drive to use single-ended I/O drivers/receivers only. Drive can operate on the interface in low voltage differential mode or single-ended, depend- ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed. Spindle starts immediately after power up—Default setting.

  • Page 48: Drive Orientation

    Barracuda 50 Product Manual, Rev. C 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 49: 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

    No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual, part number 77738479.

  • Page 52: Scsi Interface Commands Supported

    Barracuda 50 Product Manual, Rev. C 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 50 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 50 Product Manual, Rev. C Table 6: Commands supported by Barracuda 50 family drives (Continued) Command Supported by Command name code Barracuda 50 Mode select (10) Capacity Programming 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)
  • Page 54 Barracuda 50 Product Manual, Rev. C Table 6: Commands supported by Barracuda 50 family drives (Continued) Command Supported by Command name code Barracuda 50 Search data low Seek 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...

  • Page 55: Inquiry Vital Product Data

    Barracuda 50 Product Manual, Rev. C Table 7 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the Inquiry Command section of the SCSI Interface Product Manual, part number 77738479. Table 7: Barracuda 50 family drive Standard Inquiry data Bytes...
  • Page 56 Barracuda 50 Product Manual, Rev. C Table 8: Vital product data pages Byte Page Supported Unit serial number page 80h Peripheral qualifier/peripheral device type — Page code number Reserved Page length 4-11 Product serial number Implemented operating definition page 81h Peripheral qualifier/peripheral device type —...

  • Page 57: Mode Sense Data

    Barracuda 50 Product Manual, Rev. C 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 58 Barracuda 50 Product Manual, Rev. C 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 the SCSI Interface Product Manual, P/N 77738479). Definitions: = Saved value = Default value.

  • Page 59: Scsi Bus Conditions And Miscellaneous Features Supported

    Barracuda 50 Product Manual, Rev. C 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 60 Barracuda 50 Product Manual, Rev. C Supported Conditions or feature RPS (rotational position seek/sort) S2 bit SCA-2 SCA connector (optional) SCSI ID accessibility to front end (J6) SCSI-3 SPI compliant SCAM PnP level 2 compliant Variable Sector size, 512 to 2,048 in 4-byte multiples Segmented caching Y (interface only) S.M.A.R.T.

  • Page 61: 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 SCSI Interface Product Manual, part number 77738479. This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface.

  • Page 62: Figure 15. Model "Lw" Drive Physical Interface (68 Pin J1 Scsi I/O Connector)

    Barracuda 50 Product Manual, Rev. C Power +12V +12V ret + 5V ret + 5V Pin 1 Pin 1A J1-DC Power J1-DC Power Pin 1P Pin 1A Pin 1 68 Pin SCSI I/O Connector Figure 15. Model “LW” drive physical interface (68 pin J1 SCSI I/O connector) 80-pin SCSI I/O Connector...

  • Page 63: Scsi Interface Physical Description

    Barracuda 50 Product Manual, Rev. C 9.6.2 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the SCSI-3 Parallel Interface-2 (SPI-2) and EPI standards as defined in American National Standard documents X3T10/ 1142D and X3T10/1143D, and operate compatibly at the interface with devices that only support earlier single- ended SCSI-2 and SCSI-3 standards.

  • Page 64: Mating Connectors

    Barracuda 50 Product Manual, Rev. C For “LC” model: The 80 pin connector option is intended for use on drives that plug directly into a PCB or wall/bracket mounted connector in the host equipment. In such installations, all backplane wiring segments are subject to the electro- magnetic concepts presented in Standard X3T10/1142D, section 6.

  • Page 65: Figure 17. Scsi Daisy Chain Interface Cabling For "Lw" Model Drives

    Barracuda 50 Product Manual, Rev. C 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 66: Figure 18. Nonshielded 68 Pin Scsi Device Connector Used On "Lw" Models

    Barracuda 50 Product Manual, Rev. C 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 67: Figure 19. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On "Wc" And "Lc" Models

    Barracuda 50 Product Manual, Rev. C 7.00 (.276) 12.70 End View (.500) Grounding Pins 2.15 0.10 2 places 57.87 (2.278) –0.15 + .000 – .006 0.15 M Y M C L of Datum Y –Y– Front View Pin 1 62.15 0.15 (2.447) ( .005)
  • Page 68 Barracuda 50 Product Manual, Rev. C Table 13: LW 68-conductor single-ended (SE) P cable signal/pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Signal contact contact Signal name [1] number [3] number [3] name [1] –DB12...
  • Page 69 Barracuda 50 Product Manual, Rev. C Table 14: LW 68-conductor LVD P cable signal/pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Signal contact contact Signal name [1] number [3] number [3] name [1] +DB12...
  • Page 70 Barracuda 50 Product Manual, Rev. C Table 15: LC 80-pin single-ended (SE) I/O connector pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...
  • Page 71 Barracuda 50 Product Manual, Rev. C Table 16: LC 80-pin single-ended (LVD) I/O connector pin assignments [13] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...
  • Page 72 Barracuda 50 Product Manual, Rev. C Notes [ ] for Tables 13 through 16. See Section 9.7 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. Other cables types may be used to implement equivalent contact assignments. Connector contacts are on 0.050 inch (1.27 mm) centers.

  • Page 73: Electrical Description

    Barracuda 50 Product Manual, Rev. C Electrical description “LC” models use the single connection attachment (SCA) connector. This 80-pin connector is designed to plug directly into a back panel or plane. No external cables are required. Active terminators on the back panel must be provided by the user.

  • Page 74: Figure 20. Lvd Output Signals

    Barracuda 50 Product Manual, Rev. C LVD Differential Driver 1.55V –15ma Signal + = True / Logic 1 / Assertion .95V +15ma Signal – LVD Differential Driver .95V +15ma Signal + = False / Logic 0 / Negation 1.55V –15ma Signal –...

  • Page 75: Terminator Requirements

    Barracuda 50 Product Manual, Rev. C Terminator requirements Caution: These drives do not have onboard internal terminators. The user, systems integrator or host equip- ment manufacturer must provide a terminator arrangement external to the drive when termination is required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last cable connector.

  • Page 76: Disc Drive Scsi Timing

    Barracuda 50 Product Manual, Rev. C 9.10 Disc drive SCSI timing Table 17 values are not current Barracuda 50 values, but are listed for information only. Table 17: Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical timing Target Select Time (no Arbitration) <1.4 s Target Select Time (with Arbitration)

  • Page 77: Drive Activity Led

    Barracuda 50 Product Manual, Rev. C Table 17: Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical timing Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 s ±1 s Data In Byte Transfer (parameter) 4.5-12 0.04 s Data Out Byte Transfer (parameter)

  • Page 79: Seagate Technology Support Services

    Seagate's automated FAX delivery system. Using a touch-tone phone, you can obtain technical support information by return FAX 24 hours daily. This service is available worldwide. Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system. Seagate Express You can purchase select tape products and tape accessories through Seagate Express 24 hours daily by call- ing 1-800-531-0968 or by faxing your order to: +1-972-481-4812.
  • Page 80 USA/Canada/Latin America Support Services Presales Support Disc: 1-877-271-3285 or +1-405-936-1210 FAX: +1-405-936-1683 Tape: 1-800-626-6637 or +1-714-641-2500 FAX: +1-714-641-2410 Technical Support (SeaFONE) 1-800-SEAGATE or +1-405-936-1234 (for specific product phone number) FAX: Disc: +1-405-936-1685; Tape: +1-405-936-1683 SeaFAX 1-800-SEAGATE SeaTDD +1-405-936-1687 SeaBOARD Disc: +1-405-936-1600; Tape: +1-405-936-1630...
  • Page 81 Barracuda 50 Product Manual, Rev. C Africa/Middle East Support Services For presales, technical support, warranty repair and FAX services in Africa and the Middle East, dial our Euro- pean call center at +31-20-316-7222 from 8:30 a.m. to 5:00 p.m. (European central time) Monday through Fri- day, or send a FAX to +31-20-653-3513.

  • Page 83: Appendix A. Sense Keys And Additional Sense Codes Supported

    Barracuda 50 Product Manual, Rev. C Appendix A. Sense keys and additional sense codes supported Sense Description Supported No sense Recovered error Not ready Media error Hardware error Illegal request Unit attention Data protect Firmware error Aborted command Equal Volume overflow Miscompare Additional sense code and qualifier Bytes...
  • Page 84 Barracuda 50 Product Manual, Rev. C Bytes Description Supported No address mark in ID field No address mark in data field Sector not found No record found Seek positioning error Mechanical positioning error Positioning error determined by reading media Data synchronization mark error Data recovered without ECC or retries Data recovered with retries Data recovered with positive head offset...
  • Page 85 Barracuda 50 Product Manual, Rev. C Bytes Description Supported Transceiver mode changed to LVD Parameters changed by another initiator Mode select parameters changed by another initiator Log parameters changed Reservation Preempted Tagged commands cleared by another initiator Format command failed Defect locations not available Rounded parameter error Saved parameters not supported...
  • Page 87 Barracuda 50 Product Manual, Rev. C Index buffer 11 buffer segment 11 buffer-full 11 Symbols buffer-full ratio 11 +5 and +12 volt supplies 19 bulkhead connector 53 “G” list 31 bus device reset message 47 “P” list 31 bytes/surface 9 bytes/track 9 Numerics 68 conductor connector 54...
  • Page 88 Barracuda 50 Product Manual, Rev. C drive mounting 28 constraints 13 daisy-chain 20 drive option select header 36 80 conductor 54 drive orientation 10 data area 20 drive power 33 data correction 13 drive primary defects list 31 data transfer period 51 drive SCSI timing 66 data transfer protocol 7 drive select header 51...
  • Page 89 Barracuda 50 Product Manual, Rev. C format command 9 format time 10 jumper 8 formatted 8 jumper function description 37 formatting 33 jumper header 36 front panel 28 jumper plug type 33 front panel LED 62 landing zone 7 GOOD 12 LB 11 gradient 23 LED 67...
  • Page 90 Barracuda 50 Product Manual, Rev. C mounting surface 39 physical damage 27 mounting surface distortion 39 physical interface 51 mounting surface stiffness 39 physically contiguous blocks of data 12 MR heads 5 power 19 MTBF 13 power connector 19 multimode drivers 15 power control switch 10 multimode receivers 15 power dissipation 21...
  • Page 91 SCSI-3 Parallel Interface-2 (SPI-2) 53 straight-in connector 55 SE 53 strict bit in Mode page 00h 11 SE drivers 15 supply voltage 19 Seagate support service 33 support services 69 sector 11 synchronous data transfer 51 sector interleave 9 synchronous data transfer operation 67...
  • Page 92 Barracuda 50 Product Manual, Rev. C system chassis 39 system recovery procedures 13 X3.131-1994 4 X3T10/1071D 4 X3T10/1142D 4 technical support services 69 X3T10/1143D 4 temperature 10 X3T10/855D 4 ambient 23 case 23 gradient 23 zoned bit recording (ZBR) 7 maximum case 23 non-operating 23 PCB and HDA 23...
  • Page 94 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329471, Rev. C, Printed in USA...

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