The fifth-generation Cheetah® 15K.5 enterprise hard drive features innovative
perpendicular recording technology, setting new standards for 3.5-inch 15K-RPM
drive capacity, performance and reliability.
The Seagate® Cheetah 15K.5 hard drive is the first to break the 100-MB/s
sustained transfer rate barrier. These drives lead the industry in reliability,
performance and value by delivering higher throughput with fewer drives than
conventional 10K-RPM solutions . The Cheetah 15K.5 enterprise hard drive sets a
new standard for storage cost effectiveness with an unprecedented blend of
storage performance, capacity and reliability.
| Specifications |
300 GB |
146.8 GB |
73.4 GB |
Model Number
LW / LC = 68 / 80pin SCSI
FC = Fibre Channel
SS = SAS |
ST3300655LW
ST3300655LC
ST3300655FC
ST3300655SS |
ST3146855LW
ST3146855LC
ST3146855FC
ST3146855SS |
ST373455LW
ST373455LC
ST373455FC
ST373455SS |
| Capacity |
|
|
|
| Formatted 512 Kbytes/Sector (GB) |
300 |
146.8 |
73.4 |
External Transfer Rate (MB/s)
Ultra320 SCSI 4-Gb/s
Fibre Channel 3-Gb/s
Serial Attached SCSI |
320
400
300 |
320
400
300 |
320
400
300 |
| Performance |
|
|
|
| Spindle Speed (RPM) |
15K |
15K |
15K |
| Average Latency (ms) |
2 |
2 |
2 |
| Seek Time Average Read/Write (ms) Track-to-Track Read/Write (ms) |
3.5/4.0 0.2/0.4 |
3.5/4.0 0.2/0.4 |
3.5/4.0 0.2/0.4 |
| Transfer Rate Internal (Mb/s) Internal Formatted (MB/s) Sustained (MB/s) |
960 to 1607 89 to 150 73 to 125 |
960 to 1607 89 to 150 73 to 125 |
960 to 1607 89 to 150 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 Fibre Channel SAS |
17.6 18.8 17.4 |
14.2 16.5 14.9 |
13.6 14.7 13.7 |
| Power Idle (W) SCSI Fibre Channel SAS |
12.5 13.7 13.2 |
9.6 10.7 11.2 |
8.1 9.2 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: <400 Hz (Gs) |
1 |
1 |
1 |
| Vibration, Nonoperating: <400 Hz (Gs) |
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 |
