4.2.2Format command execution time (minutes)
When changing sector sizes, the format times shown below may need to be increased by 30 minutes.
| ST3450856FC | ST3300656FC | ST3146356FC |
| ST3450056FC | ST3300056FC | ST3146756FC |
Maximum (with verify) | 176 | 144 | 100 |
Maximum (without verify) | 88 | 72 | 50 |
Note. There is no significant difference in the format time between FDE and
| capacity. |
|
4.2.3 | General performance characteristics |
|
Sustainable disc transfer rate*: |
| |
Minimum | 112 Mbytes/sec (typical) | |
Maximum | 171 Mbytes/sec (typical) | |
Fibre Channel Interface maximum instantaneous transfer rate | 400 Mbytes/sec* per port | |
Logical block sizes |
| |
Default is |
| |
Sector sizes variable to 512, 520, 524 and 528 bytes. |
| |
Read/write consecutive sectors on a track | Yes | |
Flaw reallocation performance impact (for flaws reallocated at format time | Negligible | |
using the spare sectors per sparing zone reallocation scheme.) |
| |
Average rotational latency | 2.0 msec | |
*Assumes no errors and no relocated logical blocks.
Rate measured from the start of the first logical block transfer to or from the host. 1MB/sec = 1,000,000 bytes/sec
4.3Start/stop time
If the Motor Start option is disabled, the drive becomes ready within 20 seconds after DC power is applied. If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and the time to become ready may exceed 20 seconds. During spin up to ready time, the drive responds to some commands over the FC interface in less than 3 seconds after application of power. Stop time is 30 seconds (maximum) from removal of DC power.
If the Motor Start option is enabled, the internal controller accepts the commands listed in the Fibre Channel Interface Manual less than 3 seconds after DC power has been applied. After the Motor Start command has been received, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). The Motor Start command can also be used to command the drive to stop the spindle.
There is no power control switch on the drive.
12 | Cheetah 15K.6 FC Product Manual, Rev. C |
