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5.2.2
Format command execution time (minutes)
When changing sector sizes, the format times shown below may need to be increased by 30 minutes.
Maximum (with verify)
Maximum (without verify)
Note.
There is no significant difference in the format time between FDE and non-FDE models of the same
capacity.
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).
5.2.3
General performance characteristics
Sustainable disk transfer rate*:
Minimum
Maximum
SAS Interface maximum instantaneous transfer rate
Logical block sizes
Default is 512-byte data blocks
Sector sizes variable to 512, 520, and 528 kbytes.
Read/write consecutive sectors on a track
Flaw reallocation performance impact (for flaws reallocated at format time using
the spare sectors per sparing zone reallocation scheme.)
Average rotational latency
*Assumes system ability to support the rates listed and no cable loss.
1 MB/sec = 1,000,000 bytes/sec
5.3
Start/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).
10
ST3450856SS
ST3300656SS
ST3450056SS
ST3300056SS
176
144
88
72
ST3146356SS
ST3146756SS
100
50
112 Mbytes/sec (typical)
171 Mbytes/sec (typical)
300 Mbytes/sec* per port
Yes
Negligible
2.0 msec
Cheetah 15K.6 SAS Product Manual, Rev. C
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