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Seagate Cheetah 15K.5

Mainstream enterprise hard drive storage

Seagate Cheetah 15K.5

MPN: ST3146855LW
Name: Cheetah 15K.5 Mainstream enterprise hard drive storage
Brand: Cheetah
Manufacturer: Seagate Technology LLC

300, 146 and 73 GB • 15K RPM • Ultra320 SCSI,
3-Gb/s Serial Attached SCSI (SAS) and 4-Gb/s FC
Key Advantages
• Perpendicular recording is fundamentally superior, enabling 300-GB capacity with 30 percent higher sustained data rate.
• The Seagate® Cheetah® 15K.5 drive is the first drive to break the 100-MB sustained transfer rate barrier, delivering up to 125 MB/s.
• Fastest and most reliable Cheetah 15K drive ever
• 30 percent more IOPS and more than 20 percent faster response times than 3.5-inch 10K drives
• Enables higher performance with fewer drives, reducing supporting infrastructure, maintenance and space needs, while increasing system reliability
• Highest reliability of any 3.5-inch drive in the industry, designed for demanding 24x7 enterprise applications
• Reduces RAID rebuild times while minimizing reliability risks
• Nonrecoverable error rate has been improved by a factor of 10.

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 must be securely mounted to guarantee the specified performance characteristics.

Specifications

  300 GB1 146.8 GB1 73.4 GB1
Model Number ST3300655LW/LC/FC/SS ST3146855LW/LC/FC/SS ST373455LW/LC/FC/SS
Capacity
Formatted 512 Kbytes/Sector (GB) 300 146.8 73.4
External Transfer Rate (MB/s)
Ultra320 SCSI 320 320 320
4-Gb/s Fibre Channel 400 400 400
3-Gb/s Serial Attached SCSI 300 300 300
Performance
Spindle Speed (RPM) 15K 15K 15K
Average Latency (ms) 2 2 2
Seek Time
 Average Read/Write (ms) 3.5/4.0 3.5/4.0 3.5/4.0
 Track-to-Track Read/Write (ms) 0.2/0.4 0.2/0.4 0.2/0.4
Transfer Rate
 Internal (Mb/s) 960 to 1607 960 to 1607 960 to 1607
 Internal Formatted (MB/s) 89 to 150 89 to 150 89 to 150
 Sustained (MB/s) 73 to 125 73 to 125 73 to 125
Cache, Multisegmented (MB/s) 16 16 16
Configuration/Organization
Discs 4 2 1
Heads 8 4 2
Nonrecoverable Read Errors per Bits Read 1 sector per 10E16 1 sector per 10E16 1 sector per 10E16
Annualized Failure Rate (AFR) 0.62% 0.62% 0.62%
Power Management
Typical (W)
 SCSI 17.6 14.2 13.6
 Fibre Channel 18.8 16.5 14.7
 SAS 17.4 14.9 13.7
Power Idle (W)
 SCSI 12.5 9.6 8.1
 Fibre Channel 13.7 10.7 9.2
 SAS 13.2 11.2 8.4
Environmental
Temperature, Operating (°C) 5 to 55 5 to 55 5 to 55
Temperature, Nonoperating (°C) –40 to 70 –40 to 70 –40 to 70
Shock, Operating: 2 ms (Gs) 60 60 60
Shock, Nonoperating: 2 ms (Gs) 250 250 250
Acoustics Idle (bels—sound power) 3.6 3.6 3.6
Vibration, Operating: 1 1 1
Vibration, Nonoperating: 2 2 2
Physical
Height (in/mm) 1.0/25.4 1.0/25.4 1.0/25.4
Width (in/mm) 4.0/101.6 4.0/101.6 4.0/101.6
Depth (in/mm) 5.75/146.05 5.75/146.05 5.75/146.05
Weight (lb/kg) 1.5/0.771 1.5/0.771 1.5/0.771

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