Seagate ST900MM0036, Product Manual

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Savvio 10K.2 SAS Product Manual, Rev. E 11
5.2.2 Format command execution time for 512-byte sectors (minutes)
ST9146802SS ST973402SS
Maximum (with verify)
104 52
Maximum (without verify)
70 35
5.2.3 General performance characteristics
Minimum sector interleave 1 to 1
Data buffer to/from disk media (one 512-byte logical block)* 82 to 132MB/s
Sustained transfer rate 55 to 89MB/s
SAS Interface maximum instantaneous transfer rate 300MB/s* per port
(dual port = 600MB/s*)
Logical block sizes
512 (default), 520 or 528.
Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact (for flaws reallocated at format time using the
spare sectors per sparing zone reallocation scheme.) Negligible
Average rotational latency 3.0ms
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or
from the host.
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).
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).
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.