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Product Manual
Cheetah 15K.5 SCSI
ST3300655LW ST3300655LC
ST3146855LW ST3146855LC
ST373455LW ST373455LC
100384776
Rev. J
May 2010
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© 2010, Seagate Technology LLC All rights reserved. Publication number: 100384776, Rev. J May 2010 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 trade- marks or registered 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 thei
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Contents 1.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.0 Applicable standards and reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7.4 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of Figures Figure 1. Typical ST3300655LW drive +5 V LVD current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 2. ST3300655LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 3. ST3146855LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 4. ST373455LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1.0 Seagate Technology support services SEAGATE ONLINE SUPPORT and SERVICES For information regarding products and services, visit http://www.seagate.com/www/en-us/about/contact_us/ Available services include: Presales & Technical support Global Support Services telephone numbers & business hours Authorized Service Centers For information regarding Warranty Support, visit http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance For information regarding Data Recovery Services,
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2.0 Scope ® ® This manual describes Seagate Technology LLC, Cheetah 15K.5 SCSI disc drives. Cheetah 15K.5 SCSI drives support the small computer system interface (SCSI) as described in the ANSI SCSI SPI-4 interface specifications to the extent described in this manual. The SCSI Interface Manual (part number 100293069) describes general SCSI interface characteristics of this and other families of Seagate drives. From this point on in this product manual the reference to Cheetah 15K.5 SCSI mode
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3.0 Applicable standards and reference documentation The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its host equipment to provide adequate power and environment in order to achieve opti- mum 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 regu- lation. In p
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3.2 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance to the directives/standard(s) 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 Although the test
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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. 3.4 Reference documents Cheet
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4.0 General description Cheetah 15K.5 SCSI drives combine Tunneling Magnetoresistive (TMR) heads and a wide Ultra320 SCSI interface to provide high performance, high capacity data storage for a variety of systems including engineer- ing workstations, network servers, mainframes, and supercomputers. Ultra320 SCSI uses negotiated transfer rates. These transfer rates will occur only if your host adapter supports these data transfer rates and is compatible with the required hardware requirements o
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An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur- ing shipping and handling. The shipping lock automatically disengages when power is applied to the drive and the head load process begins. A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides excellent performance with minimal power dissipation. 4.1 Standard features The Cheetah 15K.5 SCSI family has the following standard features: •
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4.3 Performance • Supports industry standard Ultra320 SCSI interface • Programmable multi-segmentable cache buffer (see Section 5.5) • 15k RPM spindle. Average latency = 2.0 msec • Command queuing of up to 64 commands • Background processing of queue • Supports start and stop commands (spindle stops spinning) 4.4 Reliability • Annualized Failure Rate (AFR) of 0.62% • Increased LSI circuitry integration • Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T
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4.5.1 Programmable drive capacity Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select Parameter List table in the SCSI Interface Manual. Refer to the Parameter list block descriptor number of blocks field. A value of zero in the number of blocks field indicates that the drive shall not change the capacity it is currently formatted to have. A number in the number of blocks field that is less than the maximum number of LBAs chang
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5.0 Performance characteristics 5.1 Internal drive characteristics (transparent to user) ST3300655LW ST3146855LW ST373455LW ST3300655LC ST3146855LC ST373455LC , Drive capacity 300.0 146.8 73.4 GBytes (formatted)* ** Read/write heads 8 4 2 Tracks/surface (total) 74,340 74,340 74,340 Tracks (user accessible) Tracks/inch 125,000 125,000 125,000 TPI Peak bits/inch 890k 890k 890k BPI 2 Areal Density 110 110 110 Gbits/inch Internal data rate 960 to 1607 960 to 1607 960 to 1607 Mbits/sec (variable wi
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5.2.1 Seek time 1,2 Not including controller overhead (msec) Read Write Average Typical 3.5 4.0 Single Track Typical 0.2 0.4 Full Stroke Typical 6.8 7.5 1. Typical access times are measured under nominal conditions of temperature, volt- age, and horizontal orientation as measured on a representative sample of drives. 2. Access to data = access time + latency time. 5.2.2 Format command execution time (minutes) [1] ST3300655LW ST3146855LW ST373455LW ST3300655LC ST3146855LC ST373455LC Maximum (w
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5.3 Start/stop time After DC power at nominal voltage has been applied, the drive becomes ready within 20 seconds if the Motor Start Option is disabled (i.e., the motor starts as soon as the power has been applied). If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure which may cause the time to become ready to exceed 20 seconds. During spin up to ready time the drive responds to some com- mands over the SCSI interface in less than 3
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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. Note. The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15. The value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size specifi
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6.0 Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 9.4). 8 Seek Errors Less than 10 in 10 seeks Read Error Rates [1] 12 Recovered Data Less than 10 errors in 10 bits transferred (OEM default settings) 16 Unrecovered Data Less than 1 sector in 10 bits transferred (OEM default sett
