Seagate ST9146753SS ユーザーズマニュアル

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Savvio 15K.3 SAS Product Manual, Rev. A
5.2.2
Format command execution time 
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
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 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.
ST9300653SS
 
ST9300553SS
 
ST9300453SS
ST9146853SS
ST9146753SS
 
ST9146653SS
Maximum (with verify)
57 minutes
29 minutes
Maximum (without verify)
29 minutes
15 minutes
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 
spare sectors per sparing zone reallocation scheme.)
Negligible
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