5.2.2Format command execution time
| ST9300653SS | ST9146853SS |
| ST9300553SS | ST9146753SS |
| ST9300453SS | ST9146653SS |
Maximum (with verify) | 57 minutes | 29 minutes |
Maximum (without verify) | 29 minutes | 15 minutes |
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
5.2.3 | General performance characteristics |
|
Sustained transfer rate | 144 to 193 MiB/s ** | |
|
| 151 to 202 MB/s |
SAS Interface maximum instantaneous transfer rate | 600 MB/s* per port | |
|
| (dual port = 1,200 MB/s*) |
Logical block sizes |
| |
| 512 (default), 520, 524 and 528 |
|
Read/write consecutive sectors on a track | Yes | |
Flaw reallocation performance impact (for flaws reallocated at format time using the | Negligible | |
spare sectors per sparing zone reallocation scheme.) |
| |
Average rotational latency | 2.0 ms | |
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
**MiB/s x 1.048 = MB/s
5.3Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal operations within 30 seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 sec- onds (maximum) from removal of DC power. SCSI stop time is 20 seconds. There is no power control switch on the drive.
12 | Savvio 15K.3 SAS Product Manual, Rev. A |
