Seagate Cheetah 15K.6 SAS Product Manual
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Seagate Cheetah 15K.6 SAS Product Manual

Seagate Cheetah 15K.6 SAS Product Manual

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Product Manual
Cheetah 15K.6 SAS
ST3450856SS
ST3300656SS
ST3146356SS
100466193
Rev. A
October 2007

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Summary of Contents for Seagate Cheetah 15K.6 SAS

  • Page 1 Product Manual Cheetah 15K.6 SAS ST3450856SS ST3300656SS ST3146356SS 100466193 Rev. A October 2007...
  • Page 2 United States and/or other countries. Cheetah, SeaTools and SeaTDD are either trademarks or reg- istered 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 own- ers.

  • Page 3: Table Of Contents

    Environmental limits ........... . . 32 Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 4 Seagate Technology support services ........
  • Page 5 Cheetah 15K.6 SAS disk drive ........
  • Page 6 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 7: Scope

    Cheetah drives support the SAS Protocol specifications to the extent described in this manual. The SAS Inter- face Manual (part number 100293071) describes the general SAS characteristics of Cheetah 15K.6 and other Seagate SAS drives. Cheetah Figure 1. 15K.6 SAS disk drive Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 8 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 9: Standards, Compliance And Reference Documents

    Section 8.3. Standards The Cheetah SAS family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SAS Interface Manual, part number 100293071. The Cheetah disk drive is a UL recognized component per UL1950, CSA certified to CAN/CSA C22.2 No. 950- 95, and VDE certified to VDE 0805 and EN60950.

  • Page 10: 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 11: 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 12 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 13: General Description

    Cheetah drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns. The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that provides excellent performance with minimal power dissipation. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 14: Standard Features

    • 300 Mbytes/sec maximum instantaneous data transfers. • 15k RPM spindle. Average latency = 2.0 msec • Background processing of queue • Supports start and stop commands (spindle stops spinning) • Adaptive seek velocity; improved seek performance Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 15: Reliability

    LBAs is rounded down to the maximum capacity. Factory-installed accessories OEM standard drives are shipped with the Cheetah 15K.6 SAS Installation Guide, part number 100384785, and the Safety and Regulatory Agency Specifications, part number 75789512 (unless otherwise specified). Options (factory installed) You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping.
  • Page 16 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 17: Performance Characteristics

    6.43 7.12 Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives. Access to data = access time + latency time. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 18: Format Command Execution Time (Minutes)

    If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 19: Prefetch/Multi-Segmented Cache Control

    Mode Select command (bytes 14 and 15) does not set up a new segment 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. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 20: Caching Write Data

    When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous blocks from the disk when it senses that a prefetch hit will likely occur. The drive disables prefetch when it decides that a prefetch hit is not likely to occur. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 21: Reliability Specifications

    Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 10 bits trans- ferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 22: Seek Errors

    Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is required to insure data integrity. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 23: S.m.a.r.t

    Maximum processing delay On-line only delay Fully-enabled delay DEXCPT = 0, PERF = 1 DEXCPT = 0, PERF = 0 42 milliseconds S.M.A.R.T. delay times 163 milliseconds Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 24: Thermal Monitor

    The current algorithm implements two temperature trip points. The first trip point is set at 68°C which is the maximum temperature limit according to the drive specification. The second trip point is user-selectable using the Log Select command. The reference temperature parameter in the temperature log page (see Table 1) can Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 25: 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 26 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 27: 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 28 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 29: Physical/Electrical Specifications

    Delayed motor start (max) DC 3σ [1] [4] 0.58 0.03 0.60 0.03 Peak operating current: Typical DCX [1][6] 0.62 1.23 0.64 1.22 Maximum DC 3σ 0.64 1.24 0.65 1.23 Maximum (peak) DC 3σ 1.16 2.76 1.18 2.86 Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 30 Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient. For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 31: Conducted Noise Immunity

    The +12V and +5V current profiles for ST3450856SS, ST3300656SS and ST3146356SS models are shown below in the following figures. Note: All times and currents are typical. See Tables 2, 3, and 4 for maximum current requirements. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 32: Figure 2. Typical St3450856Ss Current Profiles

    Figure 2. Typical ST3450856SS current profiles Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 33: Figure 3. Typical St3300656Ss Current Profiles

    Figure 3. Typical ST3300656SS current profiles Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 34: Figure 4. Typical St3146356Ss Current Profiles

    Figure 4. Typical ST3146356SS current profiles Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 35: Power Dissipation

    0.400 4.00 0.200 2.00 0.000 0.00 50.0 1 00.0 1 50.0 200.0 250.0 300.0 350.0 400.0 I/Os per Second Figure 5. ST3450856SS (3 Gbit) DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 36: Figure 6. St3300656Ss (3 Gbit) Dc Current And Power Vs. Input/Output Operations Per Second

    0.400 4.00 0.200 2.00 0.000 0.00 50.0 1 00.0 1 50.0 200.0 250.0 300.0 350.0 400.0 I/Os per Second Figure 6. ST3300656SS (3 Gbit) DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 37: Figure 7. St3146356Ss (3 Gbit) Dc Current And Power Vs. Input/Output Operations Per Second

    4.00 0.200 2.00 0.000 0.00 50.0 1 00.0 1 50.0 200.0 250.0 300.0 350.0 400.0 450.0 I/Os per Second Figure 7. ST3146356SS (3 Gbit) DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 38: Environmental Limits

    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 39: Relative Humidity

    The drive subjected to nonrepetitive shock not exceeding 150 Gs at a maximum duration of 0.5 msec (half sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 40: Figure 9. Recommended Mounting

    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 41: 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 42: Electromagnetic Susceptibility

    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: Figure 10. Physical Dimensions

    (2X 3.942) 20.68 (.814) 98.42 (3.875) 33.40 (1.315) 0.76 ( .030) 0.13 (.005) 36.37 0.13 (1.432) 3.50 +/- .38 (.005) (.138 +/- .015) 0.99 (.039) 0.25 0.41 (.010) (.016) Figure 10. Physical dimensions Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 44 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • 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 Note: A recovery time limit of 0 will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the Recovery Time Limit field to 00 01. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 47: Sas System Errors

    Pre-Scan period. In the event that the drive is in a high transaction traffic environment and is unable to complete a BMS scan within 24 power on hours BMS will dis- able Pre-Scan to restore full performance to the system. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 48: Deferred Auto-Reallocation

    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 49: Installation

    The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the drive in horizontal (disks level) and vertical (drive on its side) orientations, which are the two pre- ferred mounting orientations. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 50: Cooling

    Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Above unit Under unit Note. Air flows in the direction shown or in reverse direction (side to side) Figure 12. Air flow Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 51: Drive Mounting

    Increased radiated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive ground. This is the system designer’s and integrator’s responsibility. Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 52 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 53: Interface Requirements

    Table 7 lists the SAS response codes returned for task management functions supported. Table 7: Task management response codes Function name Response code Function complete Invalid frame Function not supported Function failed Function succeeded Invalid logical unit Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 54: Dual Port Support

    • Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both ports at the same time. • Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 55: Scsi Commands Supported

    SCSI commands supported Table 8 lists the SCSI commands supported by Cheetah drives. Table 8: Commands supported by Cheetah 15K.6 SAS family drives Command name Command code Supported Change Definition Compare Copy Copy and Verify Format Unit [1] DPRY bit supported...
  • Page 56 Table 8: Commands supported by Cheetah 15K.6 SAS family drives (continued) Command name Command code Supported Non-medium Error page (06h) Pages Supported list (00h) Read Error Counter page (03h) Read Reverse Error Counter page (04h) Self-test Results page (10h) Background Medium Scan page (15h)
  • Page 57 Table 8: Commands supported by Cheetah 15K.6 SAS family drives (continued) Command name Command code Supported Reassign Blocks Receive Diagnostic Results Supported Diagnostics pages (00h) Translate page (40h) Release Release (10) Request Sense Actual Retry Count bytes Extended Sense Field Pointer bytes...
  • Page 58 Table 8: Commands supported by Cheetah 15K.6 SAS family drives (continued) Command name Command code Supported FUA bit Write Long Write Same PBdata LBdata XDRead XDWrite XPWrite Cheetah drives can format to 512, 520, 524, or 528 bytes per logical block.

  • Page 59: Inquiry Data

    When power is applied to the drive, it takes saved values from the media and stores them as current val- ues in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 60 SCSI implementation (see the SAS Interface Manual ). Definitions: DEF = Default value. Standard OEM drives are shipped configured this way. CHG = Changeable bits; indicates if default value is changeable. Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 61 80 06 00 80 0f 00 00 00 80 06 b7 c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER ASCII 000000: 34 65 F8 6F 00 00 02 00 __ __ __ __ __ __ __ __ 4e.o..Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 62 80 06 00 80 0f 00 00 00 80 06 b7 c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER ASCII 000000: 22 EC B2 5B 00 00 02 00 __ __ __ __ __ __ __ __ "..[..Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 63 80 06 00 80 0f 00 00 00 80 06 b7 c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER ASCII 000000: 11 17 73 2F 00 00 02 00 __ __ __ __ __ __ __ __ ..s/..Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 64: Miscellaneous Operating Features And Conditions

    SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes Table 11: Miscellaneous status Supported Status Good Check condition Condition met/good Busy Intermediate/good Intermediate/condition met/good Reservation conflict Task set full ACA active ACA active, faulted initiator Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 65: Sas Physical Interface

    Figure 13 shows the location of the SAS device connector J1. Figures 14 and 15 provide the dimensions of the SAS device. Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate’s SAS drives are provided in the SAS Interface Manual.. SAS Interface connector Figure 13.

  • Page 66: Figure 14. Sas Connector Dimensions

    0.08 (4X) 0.30 0.05 (4X) SEE Detail1 33.43 0.05 15.875 15.875 1.27 (14X) 1.27 (6X) 0.84 0.05 (22X) 5.08 0.15 B 4.90 0.08 0.35MIN C OF DATUM B Figure 14. SAS connector dimensions Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 67: Physical Characteristics

    Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are available from major connec- tor manufacturers. The SAS device connector is illustrated in Figures 14 and 15. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 68: Electrical Description

    Diff output pair Ground S13* +Port B_out 12 Volts charge Port B Ground P14* 12 Volts P15* 12 Volts * - Short pin to support hot plugging NC - No connection in the drive. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 69: Sas Transmitters And Receivers

    Spun up and activity (command executing) Spinning up or down Blinks steadily (50% on and 50% off, 0.5 seconds on and off for 0.5 seconds) Format in progress, each cylinder change Toggles on/off Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 70: Differential Signals

    The time values between X1 and (1 - X1) cover all but 10 of the jitter population. The random content of the total jitter population has a range of ± 7 standard deviations. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 71: Figure 17. Receive Eye Mask

    (additional sinusoidal jitter) / 2 (in V) Outline of eye mask before adding sinusoidal jitter Outline of eye mask after adding sinusoidal jitter 1-X1 1-X1 Normalized time (in UI) Figure 18. Receive tolerance eye mask Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 72: Figure 19. Sinusoidal Jitter Mask

    Sinusoidal jitter frequency sinusoidal (log/log plot) jitter (in UI) = 1.5 x 10 for 1.5 Gbps = 3.0 x 10 for 3.0 Gbps / 25,000 / 1,667 Frequency (in kHz) Figure 19. Sinusoidal jitter mask Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 73 The maximum difference in the average differential voltage (D.C. offset) component between the burst times and the idle times of an OOB signal. g The maximum difference in the average of the common mode voltage between the burst times and the idle times of an OOB signal. Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 74 The numerical difference between the average of the peaks with a BER < 10 and the average of the individual events is the measure of the asymmetry. Jitter peak-to-peak measured < (maximum total jitter - |Asymmetry|). Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 75 Common mode impedance 32.5 ± 7.5 32.5 ± 7.5 Receiver termination b,e,f Differential impedance 100 ± 15 100 ± 15 b,e,f,g Differential impedance imbalance b,e,f Receiver termination time constant 150 max 100 max Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 76 TxRx connections that are composed entirely of electrically conducting media shall be applied only to homoge- nous ground applications (e.g., between devices within an enclosure or rack, or between enclosures intercon- nected by a common ground return or ground plane). 9.5.2.4.1 Transmitter characteristics The drive are D.C. coupled. Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 77: Figure 20. Compliance Interconnect Test Load

    The default mask is IR for intra-cabinet TxRx connections. The eye masks are shown in 9.5.2.1. Figure 20 shows the compliance interconnect test load. 10 nF 50 ohm Probe TCTF points 10 nF 50 ohm SAS internal connector Figure 20. Compliance interconnect test load Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 78: Figure 21. Zero-Length Test Load

    Compliance interconnect magnitude response and ISI loss example for 1.5 Gbps ISI loss > 2.0 dB -5.4 dB Sam ple com pliance interconnect Frequency (GHz) 0.15 0.75 Figure 23. ISI loss example at 1.5 Gbps Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 79 The additional jitter reduces the eye opening in both voltage and time. Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 80 Cheetah 15K.6 SAS Product Manual, Rev. A...

  • Page 81: 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 82 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 83 23 electromagnetic compatibility 3 electromagnetic susceptibility 36 EMI requirements 3 cache operation 13 environment 44 cache segments 13 environmental caching write data 14 limits 32 Canadian Department of Communications 3 requirements 15 capacity Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 84 53 errors 16 mounting 45 illustrated 59 holes 45 physical 59 orientations 43 requirements 47 intermediate/condition met/good status 58 intermediate/good status 58 internal data rate 11 noise internal defects/errors 39 audible 3 Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 85 75 receivers 63 surface stiffness recommended mounting 34 allowable for non-flat surface 45 Recoverable Errors 15 switches 43 recovered media data 15 synchronized spindle reference operation 58 documents 5 system chassis 45 Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 86 43 tracks per inch 11 transmitters 63 transporting the drive 21 unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 vibration 33 warranty 21 zero latency read 58 zone bit recording (ZBR) 8 Cheetah 15K.6 SAS Product Manual, Rev. A...
  • Page 88 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100466193, Rev. A, Printed in USA...

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