Seagate Savvio 15K.1 FC ST973451FC Product Manual
Seagate Savvio 15K.1 FC ST973451FC Product Manual

Seagate Savvio 15K.1 FC ST973451FC Product Manual

Seagate savvio 15k.1 fc product manual
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Product Manual
Savvio
15K.1 FC
®
ST973451FC
ST936751FC
100384763
Rev. B
August 2007

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Summary of Contents for Seagate Savvio 15K.1 FC ST973451FC

  • Page 1 Product Manual Savvio 15K.1 FC ® ST973451FC ST936751FC 100384763 Rev. B August 2007...
  • Page 2 United States and/or other countries. LD25 Series, SeaTools and SeaTDD are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/or other countries. All other trademarks or registered trademarks are the property of their respective owners.
  • Page 3: Table Of Contents

    Scope ............... . 1 Applicable standards and reference documentation .
  • Page 4 Physical/electrical specifications ..........23 AC power requirements .
  • Page 5 Seagate Technology support services ........
  • Page 6 Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 7: List Of Figures

    Figure 1. Savvio 15K.1 family disc drive ..........1 Figure 2.
  • Page 9: Scope

    Savvio drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifications to the extent described in this manual. The Fibre Channel Interface Manual (part number 77767496) describes the general Fibre Channel Arbitrated Loop characteristics of this and other Seagate Fibre Channel drives. Savvio Figure 1.
  • Page 10 Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 11: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.3. Standards The Savvio family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate Fibre Channel Interface Manual, part number 100293070. The Savvio disc drive is a UL recognized component per UL1950, CSA certified to CAN/CSA C22.2 No. 950- 95, and VDE or TUV certified to EN60950.
  • Page 12: Electromagnetic Compliance

    Lead (Pb), in electronic products effective July 2006. A number of parts and materials in Seagate products are procured from external suppliers. We rely on the rep- resentations of our suppliers regarding the presence of RoHS substances in these parts and materials. Our...
  • Page 13: Reference Documents

    Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws and regulations which restrict chemical content in electronic products. These systems include standard operat- ing procedures that ensure that restricted substances are not utilized in our manufacturing operations, labora- tory analytical validation testing, and an internal auditing process to ensure that all standard operating procedures are complied with.
  • Page 14 Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 15: General Description

    General description Savvio drives combine Tunneling Magnetoresistive (TMR) heads and a Fibre Channel interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. Savvio drives also support 4-Gbit Fibre Channel which can transfer data at up to 400 Mbytes per second and 800 Mbytes per second in dual-loop configurations.
  • Page 16: Standard Features

    Standard features Savvio drives have the following standard features: • Perpendicular recording technology • 4-Gbit Fibre Channel interface. For 4 gigabit operation, the block size must be divisable by 8 • Integrated dual port FC-AL controller • Concurrent dual port transfers •...
  • Page 17: Media Description

    137,577,184 136,331,467 2. Seagate drives also may be used at the maximum available capacity at a given sector size, but the excess capacity above the guaranteed level will vary between other drive families and from generation to genera- tion, depending on how each sector size actually formats out for zone frequencies and splits over servo bursts.
  • Page 18: Programmable Drive Capacity

    3.5.1 Programmable drive capacity Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select (6) parameter list table in the Fibre Channel Interface Manual, part number 100293070. Refer to the Parameter list block descriptor number of blocks field. A value of zero in the number of blocks field indi- cates that the drive shall not change the capacity it is currently formatted to have.
  • Page 19: Performance Characteristics

    Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Sav- vio drives. Internal drive characteristics ST973451FC Drive capacity 73.4 Read/write data heads Tracks per surface (total) 42,554 Tracks per inch Peak bits per inch 861.81 Areal Density 130.58 Internal data rate 957.51 to 1,282.08...
  • Page 20: Format Command Execution Time

    4.2.2 Format command execution time ST973451FC Maximum (with verify) 52 minutes Maximum (without verify) 35 minutes 4.2.3 General performance characteristics Sustained transfer rate Fibre Channel Interface maximum instantaneous transfer rate Logical block sizes - 512 (default) - 520 - 524 - 528 Read/write consecutive sectors on a track Flaw reallocation performance impact (for flaws reallocated at format time...
  • Page 21: Prefetch/Multi-Segmented Cache Control

    The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 30 sec- onds (maximum) from removal of DC power. There is no power control switch on the drive. Prefetch/multi-segmented cache control The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance.
  • Page 22: Prefetch Operation

    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. The same buffer space and segmentation is used as set up for read functions. The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of RCD.
  • Page 23: Reliability Specifications

    Reliability specifications The following reliability specifications assume correct host and drive operational interface, including all inter- face timings, power supply voltages, environmental requirements and drive mounting constraints. Seek error rate Read Error Rates Recovered Data Unrecovered Data Miscorrected Data Interface error rate MTBF Annualized Failure Rate (AFR) Preventive maintenance...
  • Page 24: Unrecoverable Errors

    5.1.2 Unrecoverable Errors An unrecoverable data error is defined as a failure of the drive to recover data from the media. These errors occur due to head/media or write problems. Unrecoverable data errors are only detected during read opera- tions, but not caused by the read. If an unrecoverable data error is detected, a MEDIUM ERROR (03h) in the Sense Key will be reported.
  • Page 25: S.m.a.r.t

    5.2.3 Hot plugging the drive Inserting and removing the drive on the FC-AL will interrupt loop operation. The interruption occurs when the receiver of the next device in the loop must synchronize to a different input signal. FC error detection mecha- nisms, character sync, running disparity, word sync, and CRC are able to detect any error.
  • Page 26: Thermal Monitor

    Performance impact S.M.A.R.T. attribute data is saved to the disc so that the events that caused a predictive failure can be recre- ated. The drive measures and saves parameters once every two hours subject to an idle period on the FC-AL bus.
  • Page 27: Drive Self Test (Dst)

    If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test, remove it from service and return it to Seagate for service. 5.2.6.1 DST failure definition The drive will present a “diagnostic failed”...
  • Page 28 DST. It is the responsibility of the host application to determine the “not ready” cause. While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.
  • Page 29: Product Warranty

    Seagate’s option and at no charge to the customer, if returned by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure.
  • Page 30 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 the warranty. Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 31: Physical/Electrical Specifications

    Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the drive. AC power requirements None. DC power requirements The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.
  • Page 32 Table 3: DC power requirements for ST936751FC Voltage Regulation Avg idle current DCX Maximum starting current (peak DC) DC 3σ (peak AC) AC 3σ Delayed motor start (max) DC 3σ Peak operating current: Typical DCX Maximum DC 3σ Maximum (peak) DC 3σ...
  • Page 33: Conducted Noise Immunity

    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 connector. 0 to 100 kHz 150mV 100 kHz to 10 MHz 100mV...
  • Page 34: Figure 3. Typical St936751Fc Drive +12V And +5V Current Profiles

    Figure 3. Typical ST936751FC drive +12V and +5V current profiles Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 35: Power Dissipation

    Power dissipation ST973451FC Typical power dissipation under idle conditions in 1Gb operation is 5.58 watts (19.04 BTUs per hour). Typical power dissipation under idle conditions in 2Gb operation is 5.58 watts (19.04 BTUs per hour). Typical power dissipation under idle conditions in 4Gb operation is 5.88 watts (20.06 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4).
  • Page 36: Figure 6. St973451Fc Dc Current And Power Vs. Input/Output Operations Per Second At 4 Gbit

    CURRENT/POWER vs THROUGHPUT (FC - 4GB) 1 .400 1 .200 1 .000 0.800 0.600 0.400 0.200 0.000 50.0 1 00.0 Figure 6. ST973451FC DC current and power vs. input/output operations per second at 4 Gbit Random 8 Block Reads 1 50.0 200.0 250.0 300.0...
  • Page 37: Figure 7. St936751Fc Dc Current And Power Vs. Input/Output Operations Per Second At 1 Gbit

    ST936751FC Typical power dissipation under idle conditions in 1Gb operation is 5.35 watts (18.26 BTUs per hour). Typical power dissipation under idle conditions in 2Gb operation is 5.4 watts (18.43 BTUs per hour). Typical power dissipation under idle conditions in 4Gb operation is 5.75 watts (19.62 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4).
  • Page 38: Environmental Limits

    FC CURRENT/POWER vs THROUGHPUT (FC - 4GB) 1 .400 1 .200 1 .000 0.800 0.600 0.400 0.200 0.000 50.0 1 00.0 1 50.0 Figure 9. ST936751FC DC current and power vs. input/output operations per second at 4 Gbit Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part.
  • Page 39: Relative Humidity

    Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp.
  • Page 40 >600 cu in (>9,800 cu cm) Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or equivalent.
  • Page 41: Figure 11. Recommended Mounting

    Figure 11. Recommended mounting Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 42: Air Cleanliness

    The sil- ver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an ambient relative humidity greater than 95%.
  • Page 43: Acoustics

    There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea- sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.
  • Page 44: Mechanical Specifications

    Mechanical specifications Height: 0.583 in Width: 2.755 in Depth: 3.945 in Weight: 0.50 pounds .276 .583 +/- .014 .158 .160 +/- .010 2.430 +/- .010 3.016 +/- .010 .379 +/- .010 2.755 +/- .008 Figure 12. Drive dimensions (inches) 14.8 mm 69.98 mm 100.2 mm 0.227 kilograms...
  • Page 45: Defect And Error Management

    Defect and error management Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation. SCSI defect and error management involves drive internal defect/error management and SAS system error considerations (errors in communications between the initiator and the drive).
  • Page 46: Fc-Al System Errors

    The drive firmware error recovery algorithms consists of 11 levels for read recoveries and five levels for write. Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re- read or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and write retry counts.
  • Page 47: Background Media Scan

    DAR is most effective when AWRE and ARRE are enabled—this is the default setting from the Seagate factory. With AWRE and ARRE disabled DAR is unable to reallocate the failing location and will report an error sense code indicating that a write command is being attempted to a previously failing location.
  • Page 48: Idle Read After Write

    Idle Read After Write Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer.
  • Page 49: Installation

    Installation Savvio disc drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel connector (FC-SCA) are required. See Section 9.5 for additional information about this connector. Use the FC-AL interface to select drive ID and all option configurations for devices on the loop.
  • Page 50: Drive Mounting

    Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Note. Air flows in the direction shown or in reverse direction (side to side) Figure 13. Air flow Drive mounting Use M3 x .5 metric screws to mount the drive using either side, bottom, or end mounting holes. Select a screw length that results in a minimum thread engagement of 0.12 inches when using the side-mounting holes or a minimum thread engagement of 0.10 inches when using the bottom or end mounting holes.
  • Page 51: Interface Requirements

    Interface requirements This section partially describes the interface requirements as implemented on Savvio drives. Additional infor- mation is provided in the Fibre Channel Interface Manual (part number 100293070). FC-AL features This section lists the Fibre Channel-specific features supported by Savvio drives. 9.1.1 Fibre Channel link service frames Table 5 lists the link services supported by Savvio drives.
  • Page 52: Fibre Channel Task Management Functions

    9.1.2 Fibre Channel task management functions Table 6 lists the Fibre Channel SCSI Fibre Channel Protocol (FC SCSI FCP) task management functions sup- ported. Table 6: Fibre Channel SCSI FCP task management functions Task name Supported Terminate task Clear ACA Target reset Clear task set Abort task set...
  • Page 53: Fibre Channel Port Login

    9.1.4 Fibre Channel port login Table 8 identifies the required content of the N_Port Login (PLOGI) payload from an initiator. Table 8: N_Port login (PLOGI) payload Bytes 0-15 16-31 32-35 36-47 48-51 52-63 64-67 68-79 80-83 84-95 96-99 100-111 112-115 Indicates a four-bit (hex) field is not checked.
  • Page 54: Fibre Channel Port Login Accept

    9.1.5 Fibre Channel port login accept Table 9 identifies the N_Port Login access payload values. Table 9: N_Port Login Accept (ACC) payload Bytes 0-15 16-31 32-35 36-47 48-51 52-63 64-67 68-79 80-83 84-95 96-99 100-111 112-115 Bytes (22, 23 and 24) and (30, 31 and 32) are currently factory set to 00 04 CF respectively (subject to change). Receive buffer field size.
  • Page 55: Fibre Channel Process Login Accept

    9.1.7 Fibre Channel Process Login Accept Table 11 lists Savvio process login accept payload data. Table 11: Process Login Accept (ACC) payload Bytes 0-15 16-31 9.1.8 Fibre Channel fabric login Table 12 lists the fabric login payload from the drive. Table 12: Fabric Login (FLOGI) payload Bytes...
  • Page 56: Fibre Channel Fabric Accept Login

    9.1.9 Fibre Channel fabric accept login Table 13 lists the required content of the Fabric Login Accept (ACC) payload from the fabric. Table 13: Fabric Login Accept (ACC) payload Bytes 0-15 16-31 32-35 36-47 48-51 52-63 64-67 68-79 80-83 84-95 96-99 100-111 112-115...
  • Page 57: Fibre Channel Arbitrated Loop Options

    9.1.10 Fibre Channel Arbitrated Loop options Table 14 lists the FC-AL options supported by Savvio drives. Table 14: FC-AL options supported Option Supported OPEN Half Duplex Accepted from another device. OPEN Full Duplex Sent to open another device. Accepted from another device. Private Loop Public Loop Old Port State...
  • Page 58: Scsi Commands Supported

    SCSI commands supported Table 15 lists the SCSI commands supported by Savvio drives. Table 15: Supported commands Command code Supported [4] Command name Test unit ready Rezero unit Request sense Extended sense Field pointer bytes Actual retry count bytes Format unit [1] Reassign blocks Read Write...
  • Page 59 Table 15: Supported commands (continued) Command code Supported [4] Savvio 15K.1 FC Product Manual, Rev. B Command name Disconnect/reconnect control (page 02h) Format page (03h) Rigid disc drive geometry page (04h) Verify error recovery page (07h) Caching parameters page (08h) Control mode page (0Ah) Fibre Channel Interface Control page (19h) Power control page (1Ah)
  • Page 60 Table 15: Supported commands (continued) Command code Supported [4] Command name Verify Disable page out Byte check Relative address Search data high Search data equal Search data low Set limits Prefetch Synchronize cache Lock-unlock-cache Read defect data Compare Copy and verify Write buffer Write combined header and data mode (0) Write data mode (2)
  • Page 61 Table 15: Supported commands (continued) Command code Supported [4] 42-4Bh 4E-4Fh 53-54h 58-59h 5B-5Dh 60-7Fh Savvio 15K.1 FC Product Manual, Rev. B Command name LBdata Not used Log Select Log Sense Support Log page (00h) Write Error Counter page (02h) Read Error Counter page (03h) Read Reverse Error Counter page (04h) Verify Error Counter page (05h)
  • Page 62 Table 15: Supported commands (continued) Command code Supported [4] 83-8Fh C0-DFh EO-FFh Savvio drives can format to any multiple of four bytes per logical block in the range 512 to 528 bytes. Warning. Power loss during flash programming can result in firmware corruption. This usually makes the drive inoperable.
  • Page 63: Inquiry Data

    9.3.1 Inquiry data Table 16 lists the Inquiry command data that the drive should return to the initiator per the format given in the Fibre Channel Interface Manual. Table 16: Savvio inquiry data Bytes Data (hex) 0-15 03** 16-31 32-47 48-63 64-79 80-95...
  • Page 64: Miscellaneous Operating Features And Conditions

    Miscellaneous operating features and conditions Table 17 lists various features and conditions. A “Y” in the support column indicates the feature or condition is supported. An “N” in the support column indicates the feature or condition is not supported. Table 17: Miscellaneous features Supported Feature or condition...
  • Page 65: Fc-Al Physical Interface

    FC-SCA connector. Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate’s Fibre Channel drives are provided in the Fibre Channel Interface Manual.. Figure 14. Physical interface 9.5.1...
  • Page 66: Connector Requirements

    9.5.2 Connector requirements Recommended mating SCA part numbers Table 19: Part description Positions AMP Vertical (SCA sequence) Berg Methode Molex The FC-AL SCA device connector is illustrated in Figure 16. 1.618 ± .003 in (41.1 ± 0.08 mm) Pin 20 Pin 40 .64 in (16.24 mm)
  • Page 67: Pin Descriptions

    9.5.4 Pin descriptions This section provides a pin-out of the FC-SCA and a description of the functions provided by the pins. Table 20: FC-SCA pin descriptions Signal name Signal type -EN bypass port A Low Voltage TTL output 12 Volts 12 Volts 12 Volts -Parallel ESI...
  • Page 68: Fc-Al Transmitters And Receivers

    Savvio drives use 100 ohm termination which makes it compatible with backplanes designed for 1, 2, or 4 Gbit Fibre Channel transfer rates. Previous generations of Seagate FC products used 150 ohm impedance for operation in host systems designed to operate in 1 or 2 Gbit transfer rate environments.
  • Page 69: Active Led Out

    9.5.8 Active LED Out The Active LED Out signal is driven by the drive as indicated in Table 21. Table 21: Active LED Out conditions Normal command activity Spun down and no activity Spun down and activity (command executing) Spun up and no activity Spun up and activity (command executing) Spinning up or down Format in progress, each cylinder change...
  • Page 70: Sel_6 Through Sel_0 Id Lines

    Table 22: Motor start control signals Case Start_2 Start_1 High High 9.5.11 SEL_6 through SEL_0 ID lines The SEL_6 through SEL_0 ID lines determine drive address, and, optionally, for an Enclosure Services Inter- face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL line.
  • Page 71 Table 23: Arbitrated loop physical address (AL_PA) values AL_PA SEL ID Setting (hex) (hex) (dec) Savvio 15K.1 FC Product Manual, Rev. B AL_PA SEL ID Setting (hex) (hex) (dec) AL_PA SEL ID Setting (hex) (hex) (dec)
  • Page 72: Device Control Codes

    9.5.12 Device control codes The drive inputs a Device Control Code on the DEV_CTRL_CODE lines at power up to determine the link rate on the Fibre Channel ports. Both ports run at the same rate. If the backpanel does not connect to these lines, the drive has 10K ohm pull up resistors that default the device control code to 7 (1.0625 GHz).
  • Page 73: Differential Pecl Output

    9.6.2 Differential PECL output The serial PECL output signal voltage characteristics are provided in Table 26. The outputs are not AC coupled in order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to isolate potentially different DC characteristics of the outputs and the receiver.
  • Page 74 Savvio 15K.1 FC Product Manual, Rev. B...
  • Page 75: Seagate Technology Support Services

    Seagate Service Centers Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system, as well as product availability and compatibility. Technical Support Seagate technical support is available to assist you online at support.seagate.com...
  • Page 76: Usa/Canada/Latin America Support Services

    Seagate Customer Service Operations (CSO) representative for warranty- related issues. Resellers or end users of drive products should contact their place of purchase or Seagate warranty service for assistance. Have your serial number and model or part number available.
  • Page 77 Index Numerics 1 Gbit 60 12 volt pins 60 2 Gbit 60 3rd party reserve command 53 4 Gbit 60 5 volt pins 60 Abort Sequence (ABTS) 43 abort task set function 44 AC coupling 60 AC power requirements 23 ACA active status 56 ACA active, faulted initiator status 56 Accept (ACC) 43...
  • Page 78 internal 11 data transfer rate 12 data valid eye 65 Date code page command 50 DC power 58 requirements 23 defect and error management 37 deferred error handling 56 description 7 DEV_CTRL_CODE 64 Device Behavior page command 50 device control code values 64 Device Identification page command 50 device selection IDs 41 devices 41...
  • Page 79 Good status 56 gradient 31 ground shift noise 60 grounding 42 hard assigned arbitrated loop physical address (AL_PA) 41 HDA 42 heads read/write data 11 host equipment 42 hot plugging the drive 17 humidity 31 humidity limits 30 IC 45 ID and configuration options 8 Implemented operating def.
  • Page 80 command 50 monitoring state 17 motor start controls 61 mounting 42 orientations 41 mounting configuration dimensions 37 MTBF 9 N_Port Login (PLOGI) 43 payload 45 payload values 46 NN 45 Node Name 48 Node name 45 noise audible 3 noise immunity 25 non-operating 31 temperature 31 non-operating vibration 34...
  • Page 81 Read command 50 Read data mode (2) 52 Read defect data command 52 Read descriptor mode (3) 52 read error rates 15 Read extended command 51 Read Link Status (RLS) 43 Read long command 52 read/write data heads 11 Reassign blocks command 50 Receive buffer field size 45 receive buffer field size 46 Receive diagnostic results command 51...
  • Page 82 Function not supported 05 44 Function reject 04 44 task set full status 56 technical support services 67 temperature 30 limits 30 non-operating 31 regulation 3 See also cooling terminate task function 44 termination 60 terminators 41 Test unit ready command 50 Third-party Process Logout (TRPLO) 43 tracks per inch 11 tracks per surface 11...
  • Page 84 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100384763, Rev. B, Printed in USA...

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