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Seagate Cheetah 15K Product Manual

Seagate Cheetah 15K Product Manual

Cheetah 15k.6 sas serial attached scsi disk drives
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Product Manual
Cheetah 15K.6 SAS
ST3450856SS
ST3300656SS
ST3146356SS
100466193
Rev. B
September 2008
ST3450056SS (FDE)
ST3300056SS (FDE)
ST3146756SS (FDE)

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  • Page 1 Product Manual Cheetah 15K.6 SAS ST3450856SS ST3450056SS (FDE) ST3300656SS ST3300056SS (FDE) ST3146356SS ST3146756SS (FDE) 100466193 Rev. B September 2008...
  • 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

    Temperature........... . 36 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 4 Seagate Technology support services ........

  • Page 5: Scope

    LLC, Cheetah SAS (Serial Attached SCSI) disk drives. Cheetah 15K.6 drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part number 100293071) describes the general SAS characteristics of Cheetah 15K.6 and other Seagate SAS drives.
  • Page 6 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 7: Standards, Compliance And Reference Documents

    Section 8.3. Standards The Cheetah 15K.6 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 15K.6 disk drive is a UL recognized component per UL1950, CSA certified to CAN/CSA C22.2 No.

  • Page 8: 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 9: 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 10 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 11: General Description

    HDA for any reason voids your warranty. Cheetah 15K.6 drives use a dedicated landing zone at the innermost radius of the media to eliminate the pos- sibility of destroying or degrading data by landing in the data zone. The heads automatically go to the landing zone when power is removed from the drive.

  • Page 12: Standard Features

    • Background Media Scan • Power Save Cheetah 15K.6 SAS FDE models have the following additional features: • Automatic data encryption/decryption on all writes and reads to and from the media • Cryptographic erase of user data for a drive that will be repurposed or scrapped •...

  • Page 13: Reliability

    Seagate designs specify capacity points at certain block sizes that Seagate guarantees current and future products will meet. We recommend customers use this capacity in their project planning, as it ensures a stable operating point with backward and forward compatibility from generation to generation.
  • Page 14 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 15: 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. B...

  • Page 16: Format Command Execution Time (Minutes)

    If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 17: Prefetch/Multi-Segmented Cache Control

    Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical blocks. The drive dynamically creates and removes segments based on the workload. The wrap-around capa- bility of the individual segments greatly enhances the cache’s overall performance. Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 18: 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. B...

  • Page 19: 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. B...

  • Page 20: 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. B...

  • Page 21: 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. B...

  • Page 22: Thermal Monitor

    There is a separate Failure History Counter for each attribute. 5.2.5 Thermal monitor Cheetah 15K.6 drives implement a temperature warning system which: 1. Signals the host if the temperature exceeds a value which would threaten the drive. 2. Signals the host if the temperature exceeds a user-specified value.

  • Page 23: Drive Self Test (Dst)

    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 24 If the field is set to zero, the drive passed with no errors detected by the DST. If the field is not set to zero, the test failed for the reason reported in the field. Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 25: 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 26 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 27: Physical/Electrical Specifications

    Delayed motor start (max) DC 3σ [1] [4] 0.60 0.04 0.63 0.04 Peak operating current: Typical DCX [1][6] 0.62 1.19 0.64 1.19 Maximum DC 3σ 0.64 1.21 0.67 1.21 Maximum (peak) DC 3σ 1.16 2.70 1.14 2.74 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 28 Delayed motor start (max) DC 3σ [1] [4] 0.60 0.04 0.63 0.04 Peak operating current: Typical DCX [1][6] 0.58 1.06 0.60 1.06 Maximum DC 3σ 0.64 1.07 0.65 1.08 Maximum (peak) DC 3σ 1.14 2.48 1.16 2.44 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 29 Delayed motor start (max) DC 3σ [1] [4] 0.60 0.04 0.63 0.04 Peak operating current: Typical DCX [1][6] 0.58 0.95 0.61 0.95 Maximum DC 3σ 0.61 0.96 0.64 0.96 Maximum (peak) DC 3σ 1.12 2.38 1.16 2.38 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 30 Where multiple units are powered on simultaneously, the peak starting current must be available to each device. 4. Parameters, other than spindle start, are measured after a 10-minute warm up. 5. No terminator power. Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 31: Conducted Noise Immunity

    6.2.3 Current profiles The +12V and +5V current profiles are shown below in the following figures. Note: All times and currents are typical. See Tables 12, 14, and 16 for maximum current requirements. Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 32 Figure 1. Typical 450GB current profiles Figure 2. Typical 300GB current profiles Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 33 Figure 3. Typical 146GB current profiles Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 34: Power Dissipation

    +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 4. ST3450856SS, 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 35 +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 5. ST3450056SS (FDE), 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 36 +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 6. ST3300656SS, 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 37 +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 7. ST3300056SS (FDE), 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 38 +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 8. ST3146356SS, 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 39 +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. Figure 9. ST3146756SS (FDE), 3 Gbit, DC current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 40: 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 41: Relative Humidity

    • 300 Gs at a duration of 2 msec (half sinewave) • 150 Gs at a duration of 0.5 msec (half sinewave) Shock may be applied in the X, Y, or Z axis. Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 42 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 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: 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 45: 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 12. Physical dimensions Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 46 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 47: 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 48 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. B...

  • Page 49: 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. B...

  • Page 50: 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 51: Installation

    Installation Cheetah 15K.6 disk drive installation is a plug-and-play process. There are no jumpers, switches, or termina- tors on the drive. SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to accommodate the drive. In such systems, the host system typically provides a carrier or tray into which you need to mount the drive.
  • Page 52 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 13. Air flow Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 53: 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. B...
  • Page 54 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 55: Interface Requirements

    Interface requirements This section partially describes the interface requirements as implemented on Cheetah 15K.6 drives. Addi- tional information is provided in the SAS Interface Manual (part number 100293071). SAS features This section lists the SAS-specific features supported by Cheetah 15K.6 drives.

  • Page 56: Dual Port Support

    Dual port support Cheetah 15K.6 SAS drives have two independent ports. These ports may be connected in the same or differ- ent SCSI domains. Each drive port has a unique SAS address. The two ports run at the same link rate. The first port to successfully complete speed negotiation sets the link rate support by both ports.

  • Page 57: Scsi Commands Supported

    SCSI commands supported Table 21 lists the SCSI commands supported by Cheetah 15K.6 drives. Table 21: 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 58 Table 21: 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 59 Table 21: 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 60 XDRead XDWrite XPWrite Cheetah 15K.6 drives can format to 512, 520, 524, or 528 bytes per logical block. Warning. Power loss during flash programming can result in firmware corruption. This usually makes the drive inoperable. Reference Mode Sense command 1Ah for mode pages supported.

  • Page 61: Inquiry Data

    53 54 33 33 30 30 30 35 36 53 53 ST3146356SS 53 54 33 31 34 36 33 35 56 53 53 ST3146756SS (FDE) 53 54 33 31 34 36 37 35 56 53 53 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 62: Mode Sense Data

    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. B...
  • 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: 34 65 F8 6F 00 00 02 00 __ __ __ __ __ __ __ __ 4e.o..Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 64 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. B...
  • Page 65 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. B...

  • Page 66: Miscellaneous Operating Features And Conditions

    Task set full ACA active ACA active, faulted initiator 9.4.1 SAS physical interface Figure 14 shows the location of the SAS device connector J1. Figures 15 and 16 provide the dimensions of the SAS device. Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 67 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 14. Physical interface Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 68 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 15. SAS connector dimensions Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 69: Physical Characteristics

    This section defines physical interface connector. 9.4.3 Connector requirements The SAS connector on the drive complies with SFF-8482. Contact your preferred connector manufacturer for mating part information. The SAS device connector is illustrated in Figures 15 and 16. Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 70: 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. B...

  • Page 71: 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 Toggles on/off Write Same command in progress Toggles on/off Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 72: 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. B...
  • Page 73 (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 19. Receive tolerance eye mask Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 74 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 20. Sinusoidal jitter mask Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 75 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. B...
  • Page 76 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. B...
  • Page 77 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. B...
  • Page 78 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. B...
  • Page 79 The default mask is IR for intra-cabinet TxRx connections. The eye masks are shown in 9.5.2.1. Figure 21 shows the compliance interconnect test load. 10 nF 50 ohm Probe TCTF points 10 nF 50 ohm SAS internal connector Figure 21. Compliance interconnect test load Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 80 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 24. ISI loss example at 1.5 Gbps Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 81 The additional jitter reduces the eye opening in both voltage and time. Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 82 Cheetah 15K.6 SAS Product Manual, Rev. B...

  • Page 83: 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 84 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 85 23 electromagnetic compatibility 3 electromagnetic susceptibility 40 EMI requirements 3 cache operation 13 environment 47 cache segments 13 environmental caching write data 14 limits 36 Canadian Department of Communications 3 requirements 15 capacity Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 86 63 holes 49 physical 62 orientations 47 requirements 51 intermediate/condition met/good status 62 intermediate/good status 62 internal data rate 11 noise internal defects/errors 43 audible 3 internal drive characteristics 11 noise immunity 27 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 87 67 surface stiffness recommended mounting 38 allowable for non-flat surface 49 Recoverable Errors 15 switches 47 recovered media data 15 synchronized spindle reference operation 62 documents 5 system chassis 49 relative humidity 37 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 88 47 tracks per inch 11 transmitters 67 transporting the drive 21 unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 vibration 37 warranty 21 zero latency read 62 zone bit recording (ZBR) 8 Cheetah 15K.6 SAS Product Manual, Rev. B...
  • Page 90 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100466193, Rev. B, Printed in USA...

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