Seagate ST300MM0026 Savvio 10K.3 SAS Product Manual - Page 19

Start/stop time

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5.2.2 Format command execution time for 512-byte sectors (minutes) ST9300603SS ST9300503SS ST9300403SS ST9146803SS ST9146703SS ST9146603SS Maximum (with verify) 208 104 Maximum (without verify) 140 70 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 Minimum sector interleave Data buffer to/from disk media (one 512-byte logical block)* Sustained transfer rate SAS Interface maximum instantaneous transfer rate Logical block sizes 512 (default), 520 or 528. 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 1 to 1 70 to 133 MBytes/sec 67 to 124 Mbytes/sec 600 Mbytes/sec* per port (dual port = 1200 Mbytes/sec*) Yes Negligible 3.0 msec *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 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 20 seconds (maximum) from removal of DC power. SCSI stop time is 20 seconds. There is no power control switch on the drive. Savvio 10K.3 SAS Product Manual, Rev. J 11

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Savvio 10K.3 SAS Product Manual, Rev. J
11
5.2.2
Format command execution time for 512-byte sectors (minutes)
ST9300603SS
ST9300503SS
ST9300403SS
ST9146803SS
ST9146703SS
ST9146603SS
Maximum (with verify)
208
104
Maximum (without verify)
140
70
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
Minimum sector interleave
1 to 1
Data buffer to/from disk media (one 512-byte logical block)*
70 to 133 MBytes/sec
Sustained transfer rate
67 to 124 Mbytes/sec
SAS Interface maximum instantaneous transfer rate
600 Mbytes/sec* per port
(dual port = 1200 Mbytes/sec*)
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
3.0 msec
*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 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 20 sec-
onds (maximum) from removal of DC power. SCSI stop time is 20 seconds. There is no power control switch
on the drive.