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Product Manual
Cheetah 15K.5 SAS
ST3300655SS
ST3146855SS
ST373455SS
100384784
Rev. E
August 2007
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©2007, Seagate Technology LLC All rights reserved. Publication number: 100384784, Rev. E August 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 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 th
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Contents 1.0 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance and reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . .
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6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of Figures Figure 1. Cheetah 15K.5 SAS disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Figure 2. Typical ST3300655SS drive +12V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Figure 3. Typical ST3300655SS drive +5V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Figure 4. Typical ST3
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2 Cheetah 15K.5 SAS Product Manual, Rev. E
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1.0 Scope ® ® This manual describes Seagate Technology LLC, Cheetah SAS (Serial Attached SCSI) disc drives. 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.5 and other Seagate SAS drives. Figure 1. Cheetah 15K.5 SAS disc drive Cheetah 15K.5 SAS Product Manual, Rev. E 1
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2 Cheetah 15K.5 SAS Product Manual, Rev. E
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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 performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regulation. In particular, the drive mu
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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 selected sys- tem represents the most popular characteristics for test platforms. The system configurations include: � Typical current use microprocessor � 3.5-inch floppy disc drive � Keyboard � Monitor/display �Printer � External modem �Mouse Al
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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. 2.4 Reference documents Cheet
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6 Cheetah 15K.5 SAS Product Manual, Rev. E
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3.0 General description Cheetah drives combine Tunneling Magnetoresistive (TMR) heads and a Serial Attached SCSI (SAS) interface to provide high performance, high capacity data storage for a variety of systems including engineering worksta- tions, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility and high-density storage requirements. Cheetah drives are random acce
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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 downloadable using the SAS interface � 128 - deep task set (queue) � Supports up to 32 initiators � Jumperless configuration. � User-selectable logical block size (512, 520, 524, or 528 bytes per logical block) � Perpendicular recording technology
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3.4 Reliability � 1,400,000 hour MTBF (Annualized Failure Rate (AFR) of 0.62%) � 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 bytes per block. The block size is selectable at format time and must be a multiple of 4 bytes. Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities t
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3.8 Options (factory installed) You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping. Some of the options available are (not an exhaustive list of possible options): � Other capacities can be ordered depending on sparing scheme and sector size requested. � Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units shipped individually requi
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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah drives. 4.1 Internal drive characteristics ST3300655SS ST3146855SS ST373455SS *,** Drive capacity 300.0 146.8 73.4 Gbytes (formatted, rounded off value) Read/write data heads 8 4 2 Tracks per surface (total) 74,340 74,340 74,340 Tracks (user accessible) Tracks per inch 125,000 125,000 125,000 TPI Peak bits per inch 890 890 890 KBPI 2 Areal Density 11
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4.2.2 Format command execution time (minutes) ST3300655SS ST3146855SS ST373455SS 120 90 60 Maximum (with verify) 60 45 30 Maximum (without verify) 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 characteristics Sustainable disc transfer rate*: Minimum 73 Mbytes/sec Maximum 125 Mbytes/sec SAS Interface maximum instantaneous transfer rat
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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 prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the host sen
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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. If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made avail- able for future read cache hits. The same buffer space and segmentation is used as set up for read functions. The buffer segmentation scheme is set up or changed indepen
