Page 2 - ©2007, Seagate Technology LLC All rights reserved.
©2007, Seagate Technology LLC All rights reserved. Publication number: 100466193, Rev. A October 2007 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Cheetah, SeaTools and SeaTDD are either trademarks or r...
Page 3 - Contents
Cheetah 15K.6 SAS Product Manual, Rev. A i Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance and reference documents . . . . . . . . . . . . . . . . . . . . . ...
Page 4 - ii
ii Cheetah 15K.6 SAS Product Manual, Rev. A 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.4.3 Ef...
Page 5 - List of Figures
Cheetah 15K.6 SAS Product Manual, Rev. A 1 List of Figures Figure 1. Cheetah 15K.6 SAS disk drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Typical ST3450856SS current profiles . . . . . . . . . . . . . . . ....
Page 7 - Scope; This manual describes Seagate Technology; Cheetah; 5K.6 SAS disk drive
Cheetah 15K.6 SAS Product Manual, Rev. A 1 1.0 Scope This manual describes Seagate Technology ® LLC, Cheetah ® SAS (Serial Attached SCSI) disk drives. Cheetah drives support the SAS Protocol specifications to the extent described in this manual. The SAS Inter-face Manual (part number 100293071) desc...
Page 9 - Standards, compliance and reference documents; Standards; Electromagnetic compatibility
Cheetah 15K.6 SAS Product Manual, Rev. A 3 2.0 Standards, compliance and reference documents The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends on its host equipment to provide adequate power and environment for optimum performa...
Page 10 - Compliance; Electromagnetic compliance; European Union Restriction of Hazardous Substances (RoHS)
4 Cheetah 15K.6 SAS Product Manual, Rev. A 2.2 Compliance 2.2.1 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and C-Tick Marking. The drive was tested in a representative system for typical applications. The selec...
Page 11 - Reference documents
Cheetah 15K.6 SAS Product Manual, Rev. A 5 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 restri...
Page 13 - General description
Cheetah 15K.6 SAS Product Manual, Rev. A 7 3.0 General description Cheetah drives combine perpendicular recording, giant magnetoresistive (GMR) heads, partial response/max-imum likelihood (PRML) read channel electronics, embedded servo technology, and a Serial Attached SCSI (SAS) interface to provid...
Page 14 - Standard features; Cheetah drives have the following standard features:; Media description
8 Cheetah 15K.6 SAS Product Manual, Rev. A 3.1 Standard features Cheetah drives have the following standard features: • 1.5 / 3 Gbit Serial Attached SCSI (SAS) interface • Integrated dual port SAS controller supporting the SCSI protocol• Support for SAS expanders and fanout adapters• Firmware downlo...
Page 15 - dard OEM drive shipped.
Cheetah 15K.6 SAS Product Manual, Rev. A 9 3.4 Reliability • 1,600,000 hour MTBF (Annualized Failure Rate (AFR) of 0.55%)• Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)• 5-year warranty 3.5 Formatted capacities Standard OEM models are formatted to 512 ...
Page 17 - Performance characteristics; Internal drive characteristics; Access time; Not Including controller overhead
Cheetah 15K.6 SAS Product Manual, Rev. A 11 4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah drives. 4.1 Internal drive characteristics ST3450856SS ST3300656SS ST3146356SS Drive capacity 450 300 146 Gbyt...
Page 18 - General performance characteristics
12 Cheetah 15K.6 SAS Product Manual, Rev. A 4.2.2 Format command execution time (minutes) Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). 4.2.3 General performance c...
Page 19 - Cache operation; Drive transfers the requested logical blocks to the initiator.
Cheetah 15K.6 SAS Product Manual, Rev. A 13 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. 4.4 Prefetch/multi-segmented cache control The drive provides a pr...
Page 21 - Reliability specifications; Error rates; Recoverable Errors
Cheetah 15K.6 SAS Product Manual, Rev. A 15 5.0 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. 5.1 Error rates...
Page 22 - Seek errors; seeks. Unrecoverable seek errors; Interface errors; Reliability and service; Preventive maintenance; No routine scheduled preventive maintenance is required.; Hot plugging the drive
16 Cheetah 15K.6 SAS Product Manual, Rev. A 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...
Page 23 - 2 milliseconds
Cheetah 15K.6 SAS Product Manual, Rev. A 17 5.2.4 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a failure to allow yo...
Page 24 - Cheetah drives implement a temperature warning system which:
18 Cheetah 15K.6 SAS Product Manual, Rev. A Reporting control Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to the reporting method, the firmware will issue to the host an 01-5Dxx sense code. The error code is preserved through bus resets a...
Page 26 - DST has two testing options:; Log page entries
20 Cheetah 15K.6 SAS Product Manual, Rev. A 5.2.6.2.1 State of the drive prior to testing The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive m...
Page 27 - Abort
Cheetah 15K.6 SAS Product Manual, Rev. A 21 2. The Self-Test Results Value field is set to Fh 3. The drive will store the log page to non-volatile memory After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its Self-Test Results Log page in non-vo...
Page 29 - Physical/electrical specifications; AC power requirements; DC power requirements; Notes
Cheetah 15K.6 SAS Product Manual, Rev. A 23 6.0 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the drive. 6.1 AC power requirements None. 6.2 DC power requirements The voltage and current requirements for a single drive...
Page 31 - General DC power requirement notes.; The +5V and +12V supplies should employ separate ground returns.; Conducted noise immunity
Cheetah 15K.6 SAS Product Manual, Rev. A 25 15,000 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. [3] See +12V current profile in Figure 2. [4] This condition occurs after O...
Page 35 - Power dissipation; Random 8 Block Reads; Am
Cheetah 15K.6 SAS Product Manual, Rev. A 29 6.3 Power dissipation ST3450856SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 12.67 watts (43.23 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve...
Page 36 - in 3 Gbit operation
30 Cheetah 15K.6 SAS Product Manual, Rev. A ST3300656SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 11.19 watts (38.15 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locat...
Page 38 - Environmental limits; Temperature; Location of the HDA temperature check point
32 Cheetah 15K.6 SAS Product Manual, Rev. A 6.4 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum...
Page 39 - Relative humidity; The values below assume that no condensation on the drive occurs.; Shock and vibration; b. Operating—abnormal
Cheetah 15K.6 SAS Product Manual, Rev. A 33 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour. b. Non-operating 5% to 95% non-condensing relative humidity. 6.4.3 Ef...
Page 40 - Any
34 Cheetah 15K.6 SAS Product Manual, Rev. A d. Packaged disk drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-0...
Page 42 - Electromagnetic susceptibility; Mechanical specifications
36 Cheetah 15K.6 SAS Product Manual, Rev. A Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corro-sive chemicals as electronic drive component reliability can be affected by the installation environment. The sil- ver, copper, nickel and gold films ...
Page 43 - Physical dimensions
Cheetah 15K.6 SAS Product Manual, Rev. A 37 Figure 10. Physical dimensions 26.11 MAX (1.028 MAX) 2X 20.14 (2X .793) 6.35 (.250) 24.00 (.945) 2X 28.45 (2X 1.120) 2X 70.05 (2X 2.758) 122.00 (4.803) 2X 130.05 (2X 5.120) 0.36 ( .014) 146.99 MAX (5.787 MAX) 131.17 (5.164) 85.60 (3.370) 41.15 (1.620) 2X 2...
Page 45 - Defect and error management; Drive internal defects/errors
Cheetah 15K.6 SAS Product Manual, Rev. A 39 7.0 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 ...
Page 46 - These values are subject to change.; Read and write retry count maximum recovery times
40 Cheetah 15K.6 SAS Product Manual, Rev. A The drive firmware error recovery algorithms consists of 13 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 m...
Page 49 - Installation; Power is supplied through the SAS connector.; Physical interface; Drive orientation
Cheetah 15K.6 SAS Product Manual, Rev. A 43 8.0 Installation Cheetah disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on the drive. SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to acc...
Page 50 - Cooling; Air flow
44 Cheetah 15K.6 SAS Product Manual, Rev. A 8.2 Cooling Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in Section 6.4.1, "Temperature." The rack, cabinet, or drawer environmen...
Page 53 - Interface requirements; SAS features; task management functions; Table 6 lists the SAS task management functions supported.; task management responses; Task name; Task management response codes; Function name
Cheetah 15K.6 SAS Product Manual, Rev. A 47 9.0 Interface requirements This section partially describes the interface requirements as implemented on Cheetah drives. Additional infor-mation is provided in the SAS Interface Manual (part number 100293071). 9.1 SAS features This section lists the SAS-sp...
Page 54 - Dual port support; Subject to buffer availability, the Cheetah drives support:
48 Cheetah 15K.6 SAS Product Manual, Rev. A 9.2 Dual port support Cheetah SAS drives have two independent ports. These ports may be connected in the same or different SCSI domains. Each drive port has a unique SAS address. The two ports run at the same link rate. The first port to successfully compl...
Page 55 - SCSI commands supported; Commands supported by Cheetah 15K.6 SAS family drives; Command name
Cheetah 15K.6 SAS Product Manual, Rev. A 49 9.3 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 40h N Compare 39h N Copy 18h N Copy and Verify 3Ah...
Page 56 - Commands supported by Cheetah 15K.6 SAS family drives (continued)
50 Cheetah 15K.6 SAS Product Manual, Rev. A Non-medium Error page (06h) Y Pages Supported list (00h) Y Read Error Counter page (03h) Y Read Reverse Error Counter page (04h) N Self-test Results page (10h) Y Background Medium Scan page (15h) Y Start-stop Cycle Counter page (0Eh) Y Temperature page (0D...
Page 59 - PP; Mode Sense data; Default values; Bytes
Cheetah 15K.6 SAS Product Manual, Rev. A 53 9.3.1 Inquiry data Table 9 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual. Table 9: Inquiry data * Copyright year (changes with actual year). ** SCSI Revision support. Refer to ...
Page 64 - Miscellaneous operating features and conditions; Miscellaneous features; Miscellaneous status; Supported
58 Cheetah 15K.6 SAS Product Manual, Rev. A 9.4 Miscellaneous operating features and conditions Table 10 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 supporte...
Page 65 - SAS physical interface; Physical interface
Cheetah 15K.6 SAS Product Manual, Rev. A 59 9.4.1 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 ope...
Page 66 - SAS connector dimensions; C OF DATUM B
60 Cheetah 15K.6 SAS Product Manual, Rev. A Figure 14. SAS connector dimensions C OF DATUM B L 5.08 1.27 (6X) 1.27 (14X) 15.875 0.35MIN 15.875 33.43 0.05 B 4.90 0.08 0.84 0.05 (22X) 0.15 B P15 P1 S7 S1 SEE Detail1 0.30 0.05 (4X) 4.00 0.08 0.15 D 0.30 0.05 (2X) 41.13 0.15 B B C C A A 0.20 B 42.73 REF...
Page 67 - Physical characteristics; This section defines physical interface connector.; Connector requirements; The SAS device connector is illustrated in Figures 14 and 15.
Cheetah 15K.6 SAS Product Manual, Rev. A 61 Figure 15. SAS connector dimensions 9.4.2 Physical characteristics This section defines physical interface connector. 9.4.3 Connector requirements Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors wi...
Page 68 - Electrical description; SAS drives use the device connector for:; Pin descriptions
62 Cheetah 15K.6 SAS Product Manual, Rev. A 9.4.4 Electrical description SAS drives use the device connector for: • DC power• SAS interface• Activity LED This connector is designed to either plug directly into a backpanel or accept cables. 9.4.5 Pin descriptions This section provides a pin-out of th...
Page 69 - SAS transmitters and receivers; Power; Signal characteristics; Ready LED Out; Normal command activity; Ready LED Meaning bit mode page 19h
Cheetah 15K.6 SAS Product Manual, Rev. A 63 9.4.6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 16. The receiver is AC cou-pling to eliminate ground shift noise. Figure 16. SAS transmitters and receivers 9.4.7 Power The drive receiv...
Page 70 - State; VOH; LED o; General interface characteristics; Characteristic
64 Cheetah 15K.6 SAS Product Manual, Rev. A The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt supply through an appropriate current limiting resistor. The LED and the current limiting resis-tor are external to the drive. See Table ...
Page 71 - Receive eye mask; Jitter tolerance masks; is half the value for total jitter intable 18 and X1; is half the value for total jitter in table 19, for; Receive tolerance eye mask; Absolute; Abs olute
Cheetah 15K.6 SAS Product Manual, Rev. A 65 9.5.2.1.2 Receive eye mask Figure 17 describes the receive eye mask. This eye mask applies to jitter after the application of a single pole high-pass frequency-weighting function that progressively attenuates jitter at 20 dB/decade below a frequency of ((b...
Page 72 - Sinusoidal jitter mask; additional sinusoidal jitter; Sinus oidal jitte r fr e que ncy
66 Cheetah 15K.6 SAS Product Manual, Rev. A The leading and trailing edge slopes of figure 17 shall be preserved. As a result the amplitude value of Z1 is less than that given in table 17 and Z1 TOL and Z1 OP shall be defined from those slopes by the following equa- tion: where: Z1 TOL is the value ...
Page 73 - Signal characteristic; idle times of an OOB signal.
Cheetah 15K.6 SAS Product Manual, Rev. A 67 9.5.2.2 Transmitter signal characteristics Table 16 specifies the signal requirements at the transmitter end of a TxRx connection as measured into the zero-length test load. All specifications are based on differential measurements. The OOB sequence is per...
Page 74 - b The value for X1 applies at a total jitter probability of 10; Maximum allowable jitter; d Total jitter is specified at a probability of 10
68 Cheetah 15K.6 SAS Product Manual, Rev. A 9.5.2.3 Receiver signal characteristics Table 17 defines the compliance point requirements of the signal at the receiver end of a TxRx connection as measured into the test loads specified in figure 20 and figure 21. 9.5.2.3.1 Jitter Table 18 defines the ma...
Page 75 - receivers shall be able to tolerate without exceeding a BER of 10
Cheetah 15K.6 SAS Product Manual, Rev. A 69 9.5.2.3.2 Receiver jitter tolerance Table 19 defines the amount of jitter the receiver shall tolerate . 9.5.2.3.3 Compliant jitter test pattern (CJTPAT) The CJTPAT within a compliant protocol frame is used for all jitter testing unless otherwise specified....
Page 76 - transit time of the time domain reflectometer signal.; Requirement; receiver termination time constant
70 Cheetah 15K.6 SAS Product Manual, Rev. A 9.5.2.4 Electrical TxRx connections TxRx connections may be divided into TxRx connection segments. In a single TxRx connection individual TxRx connection segments may be formed from differing media and materials, including traces on printed wir-ing boards ...
Page 77 - Compliance interconnect test load; TCTF
Cheetah 15K.6 SAS Product Manual, Rev. A 71 A combination of a zero-length test load and the transmitter compliance transfer function (TCTF) test load methodology is used for the specification of transmitter characteristics. This methodology specifies the trans-mitter signal at the test points on th...
Page 78 - Figure 21 shows the zero-length test load.; Zero-length test load; Figure 22 shows an ISI loss example at 3.0 Gbps.; ISI loss example at 3.0 Gbps; Figure 23 shows an ISI loss example at 1.5 Gbps.; ISI loss example at 1.5 Gbps
72 Cheetah 15K.6 SAS Product Manual, Rev. A Figure 21 shows the zero-length test load. Figure 21. Zero-length test load Figure 22 shows an ISI loss example at 3.0 Gbps. Figure 22. ISI loss example at 3.0 Gbps Figure 23 shows an ISI loss example at 1.5 Gbps. Figure 23. ISI loss example at 1.5 Gbps Tx...
Page 79 - Receiver characteristics; The receiver operates within a BER of 10; over frequency
Cheetah 15K.6 SAS Product Manual, Rev. A 73 9.5.2.5 Receiver characteristics The drive receiver is A.C. coupled. The receive network terminates the TxRx connection by a 100 ohm equiva-lent impedance as specified in table 20. The receiver operates within a BER of 10 -12 when a SAS signal with valid v...
Page 81 - Seagate Technology support services; Internet; For information regarding Seagate products and services, visit; Seagate Service Centers; Presales Support; Seagate technical support is available to assist you online at
Cheetah 15K.6 SAS Product Manual, Rev. A 75 10.0 Seagate Technology support services Internet For information regarding Seagate products and services, visit www.seagate.com . Worldwide support is available 24 hours daily by email for your questions. Presales Support: [email protected] Technical S...
Page 82 - Customer Service Operations; Warranty Service; USA/Canada/Latin America support services; Direct dial; and Mexico; Europe, the Middle East and Africa Support Services
76 Cheetah 15K.6 SAS Product Manual, Rev. A Customer Service Operations Warranty Service Seagate offers worldwide customer support for Seagate products. Seagate distributors, OEMs and other direct customers should contact their Seagate Customer Service Operations (CSO) representative for warranty-re...
Page 83 - Index; Numerics
Cheetah 15K.6 SAS Product Manual, Rev. A 77 Index Numerics 12 volt pins 63 5 volt pins 63 A abort task set function 47 AC coupling 63 AC power requirements 23 ACA active status 58 ACA active, faulted initiator status 58 acoustics 35 active LED Out signal 63 actuator assembly design 7 adaptive cachin...
Page 86 - See also cooling
80 Cheetah 15K.6 SAS Product Manual, Rev. A T task management functions 47 Abort task set 47 Clear ACA 47 Clear task set 47 terminate task 47 task management response codes 47 Function complete 00 47 Function not supported 05 47 Function reject 04 47 task set full status 58 technical support service...
