Barracuda 18LP FC Installation Guide, Rev. A | 15 | |
Characteristics | ST39175FC | ST318275FC |
Interface | Fibre Channel | Fibre Channel |
Capacity |
|
|
Unformatted (Gbytes) | 10.8 | 21.6 |
Formatted (Gbytes)1 | 9.1 | 18.2 |
Recording |
|
|
Cylinders (user) | 11,721 | 11,721 |
Read/write data heads | 5 | 10 |
Avg bytes/track | 186,000 | 186,000 |
Access time |
|
|
Average read (msec) | 6.9 | 6.9 |
Average write (msec) | 7.8 | 7.8 |
Disc rotation |
|
|
RPM | 7,200 (+/- 0.5%) | 7,200 (+/- 0.5%) |
Average latency (msec) | 4.17 | 4.17 |
Data transfer rate |
|
|
Maximum instantaneous | 106 | 106 |
(Mbytes/sec, per port) |
|
|
1.The specified formatted capacities are calculated with the standard OEM sector size (512 bytes per logical block) and sparing.
| ST39175FC | ST318275FC | ||
DC power requirements(±5%) 1 | +5 V | +12 V | +5 V | +12 V |
Maximum start current | 0.75A | 2.0A | 0.75A | 2.0A |
Maximum operating current | 0.75A | 0.90A | 0.75A | 1.0A |
Average idle current | 0.70A | 0.55A | 0.70A | 0.65A |
1.For more detailed power information, refer to the Barracuda 18LP FC Product Manual, publication number 77767541.