Seagate 15K.4 - Cheetah - Hard Drive Product Manual
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Seagate 15K.4 - Cheetah - Hard Drive Product Manual

Seagate 15K.4 - Cheetah - Hard Drive Product Manual

Cheetah 15k.4 fc product manual
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Cheetah 15K.4 FC
ST3146854FC
ST373454FC
ST336754FC

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Summary of Contents for Seagate 15K.4 - Cheetah - Hard Drive

  • Page 1 Cheetah 15K.4 FC ST3146854FC ST373454FC ST336754FC...
  • Page 3 Cheetah 15K.4 FC ST3146854FC ST373454FC ST336754FC...
  • Page 4 Seagate Technology LLC. 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 of Seagate Technology LLC.
  • Page 5 Revision status summary sheet Revision Date Sheets Affected Rev. A 06/30/04 1/1, v-viii, 1-96. Initial release. Rev. B 07/14/04 Page 9. Rev. C 05/04/05 Pages 2,11, 25, 26, 36, 38, 50, 51, 57, and 75 - 79.

  • Page 7: Table Of Contents

    Contents Scope ............... . 1 Applicable standards and reference documentation .
  • Page 8 6.4.1 Temperature ........... . 32 6.4.2 Relative humidity .
  • Page 9 Seagate Technology support services ........
  • Page 10 Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 11: List Of Figures

    List of Figures Figure 1. Cheetah 15K.4 FC family disc drive ..........1 Figure 2.

  • Page 13: Scope

    Cheetah 15K.4 FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifi- cations 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.
  • Page 14 Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 15: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.5. Standards The Cheetah 15K.4 FC family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate Fibre Channel Interface Manual, part number 77767496.

  • Page 16: Electromagnetic Compliance

    • External modem • Mouse Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance and provide the appropriate marking for their product.

  • Page 17: Reference Documents

    Specification for Acoustic Test Requirement and Procedures Seagate part number: 30553-001 Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) In case of conflict between this document and any referenced document, this document takes precedence.
  • Page 18 Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 19: General Description

    General description Cheetah 15K.4 FC drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, 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.

  • Page 20: Standard Features

    Standard features Cheetah 15K.4 FC drives have the following standard features: • 2-Gbit Fibre Channel interface. For 2 gigabit operation, the block size must be divisable by 8. • Integrated dual port FC-AL controller • Concurrent dual port transfers • Support for FC arbitrated loop, private and public attachment •...

  • Page 21: Performance

    275,154,368 106685C0 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 10K and 15K families and from generation to gener- ation, depending on how each sector size actually formats out for zone frequencies and splits over servo bursts.

  • Page 22: Factory-Installed Accessories

    change the capacity it is currently formatted to have. A number in the number of blocks field that is less than the maximum number of LBAs changes the total drive capacity to the value in the block descriptor number of blocks field.

  • Page 23: Performance Characteristics

    Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.4 FC drives. Internal drive characteristics ST3146854FC ST373454FC ST336754FC Drive capacity 146.8 73.4 36.7 Gbytes (formatted, rounded off value) Read/write data heads Bytes per track 471,916 471,916 471,916 Bytes (average, rounded off values)

  • Page 24: Format Command Execution Time (Minutes)

    4.2.2 Format command execution time (minutes) ST3146854FC ST373454FC ST336754FC Maximum (with verify) Maximum (without verify) 4.2.3 General performance characteristics Data buffer to/from disc media (one 512-byte logical block)* Minimum 685 Mbits/sec Maximum 1,142 Mbits/sec Fibre Channel Interface maximum instantaneous transfer rate 200 Mbytes/sec* per port (dual port = 400 Mbytes/sec*) Logical block sizes...

  • Page 25: Cache Operation

    the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint that each is enabled and disabled independently using the Mode Select command; however, in actual opera- tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2. All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 16.

  • Page 26: Caching Write Data

    size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change an unchangeable parameter. 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 while the drive performs the Write command.

  • Page 27: Optimizing Cache Performance For Desktop And Server Applications

    4.5.3 Optimizing cache performance for desktop and server applications Desktop and server applications require different drive caching operations for optimal performance. This means it is difficult to provide a single configuration that meets both of these needs. In a desktop environment, you want to configure the cache to respond quickly to repetitive accesses of multiple small segments of data without taking the time to “look ahead”...
  • Page 28 Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 29: 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: Less than 10 errors in 10 seeks Read Error Rates Recovered Data Less than 10 errors in 10 bits transferred (OEM default settings)

  • Page 30: Seek Errors

    5.1.3 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense Key.

  • Page 31: Hot Plugging The Drive

    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 32: 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 33: 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 34 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 35: 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 36 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. Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 37: 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 sh‘own below. Values indicated apply at the drive connector.

  • Page 38: Conducted Noise Immunity

    314 I/Os per second for ST373454FC and ST336754FC models. Current and power specified at nominal voltages. Decreasing +5 volt supply by 5% increases 5 Volt current by 2.5%. Decreasing +12 volt supply by 5% increases 12 volt current by 3.0% (2% for ST373454FC and ST336754FC models). During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.

  • Page 39: Figure 2. Typical St3146854Fc Drive, 2 Gbit, +12V Current Profile

    Figure 2. Typical ST3146854FC drive, 2 Gbit, +12V current profile Figure 3. Typical ST3146854FC drive, 2 Gbit, +5V current profile Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 40: Figure 4. Typical St373454Fc Drive +12V Current Profile

    Figure 4. Typical ST373454FC drive +12V current profile Figure 5. Typical ST373454FC drive +5V current profile Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 41: Figure 6. Typical St336754Fc Drive +12V Current Profile

    Figure 6. Typical ST336754FC drive +12V current profile Figure 7. Typical ST336754FC drive +5V current profile Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 42: Power Dissipation

    Power dissipation ST3146854FC Typical power dissipation under idle conditions in 2Gb operation is 13.96 watts (47.6 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis.

  • Page 43: Figure 9. St373454Fc Dc Current And Power Vs. Input/Output Operations Per Second

    ST373454FC Typical power dissipation under idle conditions in 2Gb operation is 11.49 watts (39.21 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis.

  • Page 44: Environmental Limits

    ST336754FC Typical power dissipation under idle conditions in 2Gb operation is 9.88 watts (33.7 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis.

  • Page 45: 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 46 36 in (914 mm) 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 47: Figure 12. Recommended Mounting

    Figure 12. Recommended mounting Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 48: 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 49: 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 50: Mechanical Specifications

    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 Figure 13 for detailed mounting configuration dimensions. See Section 8.5, “Drive mounting.” Height: 1.000 in 25.4 mm Width:...

  • Page 51: Defect And Error Management

    Defect and error management The drive, as delivered, complies with this product manual. The read error rates and specified storage capaci- ties are not dependent upon use of defect management routines by the host (initiator). Defect and error management in the SCSI protocol involves the drive internal defect/error management and FC-AL system error considerations (errors in communications between the initiator and the drive).
  • Page 52 Table 3 equates the read and write retry count with the maximum possible recovery time for read and write recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recov- ery time limit for the command has not yet been met.

  • Page 53: Fc-Al System Errors

    Table 3: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per LBA Write retry Maximum recovery time per LBA count (cumulative, msec) count (cumulative, msec) 51.87 23.94 59.85 35.91 203.49 55.86 235.41 67.83 271.32 119.7 283.29 5 (default)

  • Page 54: Media Pre-Scan

    of the BGMS Log Page, it can avoid placing data in suspect locations on the media. Unrecovered error sites found during BGMS will be logged and recovered error sites will be logged or reallocated per ARRE/AWRE settings. With BGMS, the host system can consume less power and system overhead by only checking BGMS status/ results rather than tying up the bus and consuming power in the process of host-initiated media scanning activ- ity.

  • Page 55: Installation

    Installation Cheetah 15K.4 FC disc drive installation is a plug-and-play process. There are no jumpers, switches, or termi- nators on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel connector (FC- — SCA) no cables 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 56: Led Connections

    LED connections A connector, J6, is provided on the printed circuit board assembly (PCBA) to provide port bypass, drive active, and drive fault LED connections (see Figure 15). See Sections 9.5.7, 9.5.8, and 9.5.9 for descriptions of LED functions. Figure 14. Physical interface Drive Front...

  • Page 57: J6 Connector Requirements

    8.2.1 J6 connector requirements Recommended mating connector part number: Berg receptacle, 6-position, Berg part number 690-006. Drive orientation The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two pre- ferred mounting orientations.

  • Page 58: Drive Mounting

    (F) is applied to the fourth point. Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Technology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame.

  • Page 59: Interface Requirements

    Interface requirements This section partially describes the interface requirements as implemented on Cheetah 15K.4 FC drives. Addi- tional information is provided in the Fibre Channel Interface Manual (part number 77767496). FC-AL features This section lists the Fibre Channel-specific features supported by Cheetah 15K.4 FC drives. 9.1.1 Fibre Channel link service frames Table 4 lists the link services supported by Cheetah 15K.4 FC drives.

  • Page 60: Fibre Channel Task Management Functions

    9.1.2 Fibre Channel task management functions Table 5 lists the Fibre Channel SCSI Fibre Channel Protocol (FC SCSI FCP) task management functions sup- ported. Table 5: Fibre Channel SCSI FCP task management functions Task name Supported Terminate task Clear ACA Target reset Clear task set Abort task set...

  • Page 61: Fibre Channel Port Login

    9.1.4 Fibre Channel port login Table 7 identifies the required content of the N_Port Login (PLOGI) payload from an initiator. Table 7: N_Port login (PLOGI) payload Bytes 0-15 Common 16-31 32-35 36-47 Class 1 48-51 52-63 Class 2 64-67 68-79 Class 3 80-83 84-95...

  • Page 62: Fibre Channel Port Login Accept

    9.1.5 Fibre Channel port login accept Table 8 identifies the N_Port Login access payload values. Table 8: N_Port Login Accept (ACC) payload Bytes 0-15 Common 16-31 32-35 36-47 Class 1 48-51 52-63 Class 2 64-67 68-79 Class 3 80-83 84-95 Reserved 96-99 100-111...

  • Page 63: Fibre Channel Process Login Accept

    9.1.7 Fibre Channel Process Login Accept Table 10 lists Cheetah 15K.4 FC process login accept payload data. Table 10: Process Login Accept (ACC) payload Bytes 0-15 16-31 9.1.8 Fibre Channel fabric login Table 11 lists the fabric login payload from the drive. Table 11: Fabric Login (FLOGI) payload Bytes...

  • Page 64: Fibre Channel Fabric Accept Login

    9.1.9 Fibre Channel fabric accept login Table 12 lists the required content of the Fabric Login Accept (ACC) payload from the fabric. Table 12: Fabric Login Accept (ACC) payload Bytes 0-15 Common 16-31 32-35 36-47 Class 1 48-51 52-63 Class 2 64-67 68-79 Class 3...

  • Page 65: Fibre Channel Arbitrated Loop Options

    • If both ports are connected in the same loop and hard addressing is used, at least one port will attempt tak- ing a soft address to prevent an address conflict. Note. When a Cheetah 15K.4 FC drive is connected in loops with previous Seagate FC drive products: Barracuda 4LP FC (ST32171FC, ST34371FC, and ST34571FC) Barracuda 9FC (ST19171FC)

  • Page 66: Scsi Commands Supported

    SCSI commands supported Table 14 lists the SCSI commands supported by Cheetah 15K.4 FC drives. Table 14: 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...
  • Page 67 Table 14: Supported commands (continued) Command code Supported [4] Command name Verify error recovery page (07h) Caching parameters page (08h) Control mode page (0Ah) Fibre Channel Interface Control page (19h) Power control page (1Ah) Information exceptions control page (1Ch) Start unit/stop unit Receive diagnostic results Supported diagnostics pages Translate page...
  • Page 68 Table 14: Supported commands (continued) Command code Supported [4] Command name 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) Download microcode mode (4) Download microcode and save modes (5) Download microcode with offsets mode (6) Download microcode with offsets and save mode (7)
  • Page 69 Table 14: Supported commands (continued) Command code Supported [4] Command name Application Client page (0Fh) Self Test Results page (10h) Cache Statistics Counter page (37h) Factory Log page (3Eh) 4E-4Fh Not used XD write XP write XD read 53-54h Not used Mode Select (10) [3] Reserved (10) 3rd party reserve...

  • Page 70: Inquiry Data

    9.3.1 Inquiry data Table 15 lists the Inquiry command data that the drive should return to the initiator per the format given in the Fibre Channel Interface Manual. Table 15: Cheetah 15K.4 FC inquiry data Bytes Data (hex) 0-15 03** Vendor ID 16-31 Product ID...
  • Page 71 On standard OEM drives, the saved values are taken from the default values list and stored into the saved values storage location on the media prior to shipping. 3. Current values Current values are volatile values being used by the drive to control its operation. A Mode Select command can be used to change the values identified as changeable values.
  • Page 72 Table 16: Mode Sense data saved, default and changeable values for ST3146854FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 11 17 73 30 00 00 02 00 MODE SENSE PAGES DATA SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff SAV 82 0e 80 80 00 00 00 00 00 00 05 bc 00 00 00 00...
  • Page 73 Table 17: Mode Sense data default and changeable values for ST373454FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02 00 MODE SENSE PAGES DATA SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff SAV 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00...
  • Page 74 Table 18: Mode Sense data default and changeable values for ST336754FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 04 45 dc cc 00 00 02 00 MODE SENSE PAGES DATA SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff SAV 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00...

  • Page 75: Miscellaneous Operating Features And Conditions

    Miscellaneous operating features and conditions Table 19 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 19: Miscellaneous features Supported Feature or condition...

  • Page 76: Fc-Al Physical Interface

    Figure 19 provides the dimensions of the FC-SCA connector. Figure 20 provides the dimensions of the J6 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 17. Physical interface 9.5.1...

  • Page 77: Connector Requirements

    9.5.2 Connector requirements Recommended mating SCA part numbers Table 21: Part description Positions Part number Features With polarization AMP Vertical (SCA sequence) 787317-1 With polarization Berg 71781 With polarization Methode 512-220-91-101N With polarization Molex 717431040 The FC-AL SCA device connector is illustrated in Figure 19. The J6 connector is illustrated in Figure 20. 1.618 .003 in (41.1...

  • Page 78: Electrical Description

    9.5.3 Electrical description Fibre Channel drives use the FC-SCA connector for: • DC power • FC-AL interface • Drive select (device identification) • Option selection • Enclosure Services interface This 40-pin connector is designed to plug directly into a backpanel. External cables are not required. 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.

  • Page 79: Fc-Al Transmitters And Receivers

    9.5.5 FC-AL transmitters and receivers A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 21. The receiver is required to provide the AC coupling to eliminate ground shift noise. Differential Transmitter Receiver Transfer Medium Figure 21. FC-AL transmitters and receivers 9.5.6 Power...

  • Page 80: Enable Port Bypass Signals

    Table 23: Active LED Out conditions Normal command activity LED status Spun up and activity (command executing) Spinning up or down Blinks steadily (50% on and 50% off) Format in progress, each cylinder change Toggles on/off The Active LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +5 volt supply through an appropriate current limiting resistor.
  • Page 81 lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these lines. The backpanel is required to provide high and low inputs to the SEL_ID lines per the specifications in table 27 on page 71.
  • Page 82 Table 25: Arbitrated loop physical address (AL_PA) values AL_PA SEL ID Setting AL_PA SEL ID Setting AL_PA SEL ID Setting (hex) (hex) (dec) (hex) (hex) (dec) (hex) (hex) (dec) Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 83: 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 84: Led Driver Signals

    9.6.2 LED driver signals Fault and Active LED signals are located in the FC-SCA connector (J1) and through the indicator connector (J6). See Table 28 for the output characteristics of the LED drive signals. Table 28: LED drive signal State Current drive available Output voltage LED off, high...

  • Page 85: Figure 23. Receive Eye Diagram

    Figure 23 provides the data valid eye diagram for typical and minimum requirements to recover data at the specified interface error rate. The inputs are AC coupled on the drive. 941 ps 659 ps Typical Minimum 376 ps Figure 23. Receive eye diagram Cheetah 15K.4 FC Product Manual, Rev.
  • Page 86 Cheetah 15K.4 FC Product Manual, Rev. C...

  • Page 87: Seagate Technology Support Services

    +1-405-324-4770. 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 drive availability and compatibility. Technical Support If you need help installing your drive, consult your system's documentation or contact the dealer's support ser- vices department for assistance specific to your system.
  • Page 88 Data Recovery Services Seagate offers data recovery services for all formats and all brands of storage media. Our Data Recovery Ser- vices labs are currently located in North America. To get a free quick quote or speak with a case management representative, call 1-800-475-0143.
  • Page 89 European support services For presales and technical support in Europe, dial the Seagate Service Center toll-free number for your spe- cific location. If your location is not listed here, dial our presales and technical support call center at +1-405- 324-4714 from 8:00 .
  • Page 90 Warranty service is available from 9:00 . to 6:00 . April through October, and 10:00 . to 7:00 November through March (Australian Eastern time) Monday through Friday. Seagate Service Centers Call center Toll-free Direct dial Australia 1800-14-7201 —...
  • Page 91 We are interested in your comments and suggestions regarding this publication. Please take a few minutes to participate in our survey at the following URL: http://survey.seagate.com/survey/techpubs.nsf Thank you for your time and comments. Cheetah 15K.4 FC Product Manual, Rev. C...
  • Page 92 Cheetah 15K.4 FC Product Manual, Rev. C...
  • Page 93 Index BGMS 41 buffer data 8 Numerics space 13 busy status 63 12 volt bypass circuit 19 pins 67 Byte check command 55 3rd party reserve command 57 bytes per surface 11 5 volt pins 67 bytes per track 11 Abort Sequence (ABTS) 47 cache operation 13 abort task set function 48...
  • Page 94 electromagnetic susceptibility 37 EMI requirements 3 data block size enable bypass modifing the 9 port A 68 data buffer to/from disc media 12 port B 68 data heads signal 68 read/write 11 state 19 data rate Enclosure Services interface 66 internal 11 Enclosure services page command 55 data transfer rate 12...
  • Page 95 Firmware numbers page command 54 requirements 47 flawed sector reallocation 8 interleave 8 FLOGI intermediate/condition met/good status 63 received on Port A 51 intermediate/good status 63 received on Port B 51 Intermix 49 Force unit access command 55 internal data rate 11 form factor 8 internal defects/errors 39 format 43...
  • Page 96 Parameter rounding 63 old port state Queue tagging 63 FC-AL options 53 Reporting actual retry count 63 OPEN Full Duplex Segmented caching 63 FC-AL options 53 SMP = 1 in Mode Select command 63 OPEN half duplex Synchronized (locked) spindle operation 63 FC-AL options 53 Zero latency read 63 Open sequences per exchange 49...
  • Page 97 requirements, DC 25 Register FC-4 Types (RFT_ID) 47 sequencing 26 Relative address command 55 Power control page (1Ah) command 55 relative humidity 33 power distribution 3 Release command 54 power failure warning 71 Released (10) command 57 Prefetch command 56 reliability 9 prefetch/multi-segmented cache control 12 specifications 17...
  • Page 98 shock 33 and vibration 33 UI 50 shock mount 46 unformatted 9 signal unique identifier 50 characteristics 71 Unit attention page (00h) command 54 LED driver 72 Unit serial number page command 54 single-unit shipping pack kit 10 Unrecoverable Errors 17 SMART 9 unrecovered media data 17 SMP = 1 in Mode Select command 63...
  • Page 100 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100220449, Rev. C, Printed in USA...

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