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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.
- 10K.2 SAS 1
- Contents 3
- List of Figures 5
- 2.0 Scope 8
- 3.1 Standards 9
- 3.2 Reference documents 11
- 4.0 General description 12
- 4.1 Standard features 13
- 4.2 Media description 13
- 4.3 Performance 13
- 4.4 Reliability 14
- 4.5 Formatted capacities 14
- 4.8 Factory-installed options 15
- 5.3 Start/stop time 17
- 5.5 Cache operation 18
- 6.1 Error rates 20
- 6.2 Reliability and service 21
- S.M.A.R.T. delay times 22
- 7.1 AC power requirements 27
- 7.2 DC power requirements 27
- 7.3 Power dissipation 31
- 7.4 Environmental limits 32
- 7.5 Mechanical specifications 37
- 8.3 SAS system errors 39
- 8.4 Background Media Scan 40
- 8.5 Media Pre-Scan 40
- 8.7 Idle Read After Write 41
- 9.0 Installation 42
- 9.2 Cooling 43
- 9.3 Drive mounting 44
- 9.4 Grounding 44
- 10.0 Interface requirements 45
- 10.2 Dual port support 46
- 10.3 SCSI commands supported 47
- C OF DATUM B 57
- 10.5 Signal characteristics 60
- Figure 15. Receive eye mask 62
- Seagate Technology LLC 76
- April 2012 76
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