Seagate ST32000646SS Constellation ES SAS Product Manual - Page 19

Start/stop time

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5.2.2 Format command execution time for 512-byte sectors (minutes) Maximum (with verify) Maximum (without verify) ST32000444SS ST32000445SS ST32000446SS 627 314 ST31000424SS ST31000425SS ST31000426SS 345 173 ST3500414SS ST3500415SS ST3500416SS 173 86 Note. There is approximately a 1.5 increase in time to format a SED drive versus a non-SED drive of the same capacity. 5.2.3 General performance characteristics Minimum sector interleave Data buffer to/from disc media (one 512-byte logical block)* Sustained transfer rate SAS Interface maximum instantaneous transfer rate Logical block sizes 512 (default), 520, 524 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 95 to 212 MB/s 60 to 150 MB/s 600MB/s* per port (dual port = 1200MB/s*) Yes Negligible 4.16ms *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. Constellation ES Series SAS Product Manual, Rev. F 11

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Constellation ES Series SAS Product Manual, Rev. F
11
5.2.2
Format command execution time for 512-byte sectors (minutes)
ST32000444SS
ST32000445SS
ST32000446SS
ST31000424SS
ST31000425SS
ST31000426SS
ST3500414SS
ST3500415SS
ST3500416SS
Maximum (with verify)
627
345
173
Maximum (without verify)
314
173
86
Note.
There is approximately a 1.5 increase in time to format a SED drive versus a non-SED drive of the same capacity.
5.2.3
General performance characteristics
Minimum sector interleave
1 to 1
Data buffer to/from disc media (one 512-byte logical block)*
95 to 212 MB/s
Sustained transfer rate
60 to 150 MB/s
SAS Interface maximum instantaneous transfer rate
600MB/s* per port
(dual port = 1200MB/s*)
Logical block sizes
512 (default), 520, 524 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
4.16ms
*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.