Page 2 - ©2008, Seagate Technology LLC All rights reserved.
©2008, Seagate Technology LLC All rights reserved. Publication number: 100466193, Rev. B September 2008 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...
Page 3 - Contents
Cheetah 15K.6 SAS Product Manual, Rev. B i Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance and reference documents . . . . . . . . . . . . . . . . . . . . . ...
Page 4 - ii
ii Cheetah 15K.6 SAS Product Manual, Rev. B 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 6.4.4 Shock a...
Page 5 - Scope; This manual describes Seagate Technology; Model Number; Yes
Cheetah 15K.6 SAS Product Manual, Rev. B 1 1.0 Scope This manual describes Seagate Technology ® 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)...
Page 7 - Standards, compliance and reference documents; Standards; Electromagnetic compatibility
Cheetah 15K.6 SAS Product Manual, Rev. B 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 8 - Compliance; Electromagnetic compliance; European Union Restriction of Hazardous Substances (RoHS)
4 Cheetah 15K.6 SAS Product Manual, Rev. B 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 9 - Reference documents
Cheetah 15K.6 SAS Product Manual, Rev. B 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 11 - General description
Cheetah 15K.6 SAS Product Manual, Rev. B 7 3.0 General description Cheetah 15K.6 drives provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI inter-face is designed t...
Page 12 - Standard features; Cheetah 15K.6 drives have the following standard features:; Media description
8 Cheetah 15K.6 SAS Product Manual, Rev. B 3.1 Standard features Cheetah 15K.6 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 ...
Page 13 - dard OEM drive shipped.
Cheetah 15K.6 SAS Product Manual, Rev. B 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 15 - Performance characteristics; Internal drive characteristics; Access time; Not Including controller overhead
Cheetah 15K.6 SAS Product Manual, Rev. B 11 4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.6 drives. 4.1 Internal drive characteristics ST3450856SS ST3300656SS ST3146356SS ST3450056SS ST3300056SS S...
Page 16 - General performance characteristics
12 Cheetah 15K.6 SAS Product Manual, Rev. B 4.2.2 Format command execution time (minutes) When changing sector sizes, the format times shown below may need to be increased by 30 minutes. Note. There is no significant difference in the format time between FDE and non-FDE models of the same capacity. ...
Page 17 - Cache operation; Drive transfers the requested logical blocks to the initiator.
Cheetah 15K.6 SAS Product Manual, Rev. B 13 If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with t...
Page 19 - Reliability specifications; Error rates; Recoverable Errors
Cheetah 15K.6 SAS Product Manual, Rev. B 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 20 - 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. B 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 21 - 2 milliseconds
Cheetah 15K.6 SAS Product Manual, Rev. B 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 - DST has two testing options:; Log page entries; The Self-Test Results Value field is set to Fh
20 Cheetah 15K.6 SAS Product Manual, Rev. B A Drive Not Ready condition is reported by the drive under the following conditions:• Motor will not spin• Motor will not lock to speed• Servo will not lock on track• Drive cannot read configuration tables from the disk In these conditions, the drive respo...
Page 27 - Physical/electrical specifications; AC power requirements; DC power requirements; Notes
Cheetah 15K.6 SAS Product Manual, Rev. B 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 33 - Typical 146GB current profiles
Cheetah 15K.6 SAS Product Manual, Rev. B 29 Figure 3. Typical 146GB current profiles
Page 34 - Power dissipation; model
30 Cheetah 15K.6 SAS Product Manual, Rev. B 6.3 Power dissipation ST3450856SS model Typical power dissipation under idle conditions in 3Gb operation is 11.85 watts (40.44 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4...
Page 39 - in 3 Gbit operation
Cheetah 15K.6 SAS Product Manual, Rev. B 35 ST3146756SS (FDE) model in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 9.15 watts (31.22 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figur...
Page 40 - Environmental limits; Temperature; Location of the HDA temperature check point
36 Cheetah 15K.6 SAS Product Manual, Rev. B 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 42 - Any
38 Cheetah 15K.6 SAS Product Manual, Rev. B 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 44 - Electromagnetic susceptibility; Mechanical specifications
40 Cheetah 15K.6 SAS Product Manual, Rev. B 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 45 - Physical dimensions
Cheetah 15K.6 SAS Product Manual, Rev. B 41 Figure 12. 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 47 - Defect and error management; Drive internal defects/errors
Cheetah 15K.6 SAS Product Manual, Rev. B 43 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 48 - These values are subject to change.; Read and write retry count maximum recovery times
44 Cheetah 15K.6 SAS Product Manual, Rev. B 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 51 - Installation; Power is supplied through the SAS connector.; Drive orientation
Cheetah 15K.6 SAS Product Manual, Rev. B 47 8.0 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...
Page 52 - Air flow
48 Cheetah 15K.6 SAS Product Manual, Rev. B If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 13. The air-flow pat-terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air...
Page 55 - Interface requirements; SAS features; task management functions; Table 19 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. B 51 9.0 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). 9.1 SAS features This section lists the ...
Page 56 - Dual port support; Subject to buffer availability, the Cheetah 15K.6 drives support:
52 Cheetah 15K.6 SAS Product Manual, Rev. B 9.2 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 successfull...
Page 57 - SCSI commands supported; Commands supported by Cheetah 15K.6 SAS family drives; Command name
Cheetah 15K.6 SAS Product Manual, Rev. B 53 9.3 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 40h N Compare 39h N Copy 18h N Copy and Ve...
Page 58 - Commands supported by Cheetah 15K.6 SAS family drives (continued)
54 Cheetah 15K.6 SAS Product Manual, Rev. B 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 61 - PP; Bytes
Cheetah 15K.6 SAS Product Manual, Rev. B 57 9.3.1 Inquiry data Table 22 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual. Table 22: Inquiry data * Copyright year (changes with actual year). ** SCSI Revision support. Refer t...
Page 62 - Mode Sense data; Default values
58 Cheetah 15K.6 SAS Product Manual, Rev. B 9.3.2 Mode Sense data The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The drive maintains four sets of mode parameters: 1. Default values Default values are hard-coded in the drive firmware stored in...
Page 66 - Miscellaneous operating features and conditions; SAS physical interface; Miscellaneous status; Supported
62 Cheetah 15K.6 SAS Product Manual, Rev. B 9.4 Miscellaneous operating features and conditions Table 23 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 67 - Physical interface
Cheetah 15K.6 SAS Product Manual, Rev. B 63 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.. Figure 14. Physical interface SAS Interface connector
Page 68 - SAS connector dimensions; C OF DATUM B
64 Cheetah 15K.6 SAS Product Manual, Rev. B Figure 15. 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 69 - Physical characteristics; This section defines physical interface connector.; Connector requirements; The SAS device connector is illustrated in Figures 15 and 16.
Cheetah 15K.6 SAS Product Manual, Rev. B 65 Figure 16. SAS connector dimensions 9.4.2 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 mati...
Page 70 - Electrical description; SAS drives use the device connector for:; Pin descriptions
66 Cheetah 15K.6 SAS Product Manual, Rev. B 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 71 - 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. B 67 9.4.6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 17. The receiver is AC cou-pling to eliminate ground shift noise. Figure 17. SAS transmitters and receivers 9.4.7 Power The drive receiv...
Page 72 - State; VOH; LED o; General interface characteristics; Characteristic
68 Cheetah 15K.6 SAS Product Manual, Rev. B 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 73 - Receive eye mask; Jitter tolerance masks; is half the value for total jitter intable 31 and X1; is half the value for total jitter in table 32, for; Receive tolerance eye mask; Absolute; Abs olute
Cheetah 15K.6 SAS Product Manual, Rev. B 69 9.5.2.1.2 Receive eye mask Figure 18 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 74 - Sinusoidal jitter mask; additional sinusoidal jitter; Sinus oidal jitte r fr e que ncy
70 Cheetah 15K.6 SAS Product Manual, Rev. B The leading and trailing edge slopes of figure 18 shall be preserved. As a result the amplitude value of Z1 is less than that given in table 30 and Z1 TOL and Z1 OP shall be defined from those slopes by the following equa- tion: where: Z1 TOL is the value ...
Page 75 - Signal characteristic; idle times of an OOB signal.
Cheetah 15K.6 SAS Product Manual, Rev. B 71 9.5.2.2 Transmitter signal characteristics Table 29 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 76 - 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
72 Cheetah 15K.6 SAS Product Manual, Rev. B 9.5.2.3 Receiver signal characteristics Table 30 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 21 and figure 22. 9.5.2.3.1 Jitter Table 31 defines the ma...
Page 77 - receivers shall be able to tolerate without exceeding a BER of 10
Cheetah 15K.6 SAS Product Manual, Rev. B 73 9.5.2.3.2 Receiver jitter tolerance Table 32 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 78 - transit time of the time domain reflectometer signal.; Requirement; receiver termination time constant
74 Cheetah 15K.6 SAS Product Manual, Rev. B 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 79 - Compliance interconnect test load; TCTF
Cheetah 15K.6 SAS Product Manual, Rev. B 75 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 80 - Figure 22 shows the zero-length test load.; Zero-length test load; Figure 23 shows an ISI loss example at 3.0 Gbps.; ISI loss example at 3.0 Gbps; Figure 24 shows an ISI loss example at 1.5 Gbps.; ISI loss example at 1.5 Gbps
76 Cheetah 15K.6 SAS Product Manual, Rev. B Figure 22 shows the zero-length test load. Figure 22. Zero-length test load Figure 23 shows an ISI loss example at 3.0 Gbps. Figure 23. ISI loss example at 3.0 Gbps Figure 24 shows an ISI loss example at 1.5 Gbps. Figure 24. ISI loss example at 1.5 Gbps Tx...
Page 81 - Receiver characteristics; The receiver operates within a BER of 10; over frequency
Cheetah 15K.6 SAS Product Manual, Rev. B 77 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 33. The receiver operates within a BER of 10 -12 when a SAS signal with valid v...
Page 83 - 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. B 79 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 84 - Customer Service Operations; Warranty Service; USA/Canada/Latin America support services; Direct dial; and Mexico; Europe, the Middle East and Africa Support Services
80 Cheetah 15K.6 SAS Product Manual, Rev. B 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 85 - Index; Numerics
Cheetah 15K.6 SAS Product Manual, Rev. B 81 Index Numerics 12 volt pins 67 5 volt pins 67 A abort task set function 51 AC coupling 67 AC power requirements 23 ACA active status 62 ACA active, faulted initiator status 62 acoustics 39 active LED Out signal 67 actuator assembly design 7 adaptive cachin...
Page 88 - See also cooling
84 Cheetah 15K.6 SAS Product Manual, Rev. B T task management functions 51 Abort task set 51 Clear ACA 51 Clear task set 51 terminate task 51 task management response codes 51 Function complete 00 51 Function not supported 05 51 Function reject 04 51 task set full status 62 technical support service...
