4.2.2Format command execution time (minutes)
When changing sector sizes, the format times shown below may need to be increased by 30 minutes.
| ST3600057SS | ST3450857SS | ST3300657SS |
Maximum (with verify) | 119 | 90 | 58 |
Maximum (without verify) | 60 | 45 | 29 |
Note. There is no significant difference in the format time between SED and
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 |
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Sustainable disk transfer rate*: |
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Minimum | 122 | Mbytes/sec (typical) | |
Maximum | 204 | Mbytes/sec (typical) | |
SAS Interface maximum instantaneous transfer rate | 600 | Mbytes/sec* per port | |
Logical block sizes |
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Default is |
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Sector sizes variable to 512, 520, and 528 kbytes. |
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Read/write consecutive sectors on a track | Yes |
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Flaw reallocation performance impact (for flaws reallocated at format time using | Negligible | ||
the spare sectors per sparing zone reallocation scheme.) |
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Average rotational latency | 2.0 msec | ||
*Assumes system ability to support the rates listed and no cable loss. |
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1 MB/sec = 1,000,000 bytes/sec |
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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 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 20 seconds (excluding the error recovery procedure).
Cheetah 15K.7 SAS Product Manual, Rev. A | 9 |
