4.2.2Format command execution time (minutes)
| ST3400755SS |
Maximum (with verify) | 180 |
Maximum (without verify) | 100 |
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).
4.2.3 | General performance characteristics |
|
Sustainable disk transfer rate*: |
| |
Minimum | 54 Mbytes/sec | |
Maximum | 97 Mbytes/sec | |
SAS Interface maximum instantaneous transfer rate | 300 Mbytes/sec* per port | |
|
| (dual port = 600 Mbytes/sec*) |
Logical block sizes |
| |
Default is |
| |
Sector sizes variable to 512, 520, 524, and 528 kbytes. |
| |
Read/write consecutive sectors on a track | Yes | |
Flaw reallocation performance impact (for flaws reallocated at format time using | Negligible | |
the spare sectors per sparing zone reallocation scheme.) |
| |
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
4.3Start/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 30 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 30 sec- onds (maximum) from removal of DC power.
There is no power control switch on the drive.
12 | Cheetah NS SAS Product Manual, Rev. B |
