Start/Stop Time - Seagate ST400FM0323 Product Manual

Standard 2.5" Models -
Light Endurance
Maximum Burst Transfer Rate
Sustained sequential 128KB read/write
data transfer rate (MB/s max)
Sustained 4KB random read/write
command rate (IOPs)
Sustainable 4KB Random combined
IOPS for 5 year Endurance
(65%/35% R/W, 70% Duty Cycle)
[1] Testing performed at Queue Depth = 64, Sequentially Preconditioned drive, using IOMeter 2006.7.27.
[2] Testing performed at Queue Depth = 64, Randomly Preconditioned drive, using IOMeter 2006.7.27.
[3] Testing performed at Queue Depth = 64, Non-Preconditioned drive, using IOMeter 2006.7.27.
Note.
IOMeter is available at
IOMeter is licensed under the Intel Open Source License and the GNU General Public License. Intel does not endorse any
IOMeter results.
Peak performance is defined as the typical best case performance that the product will be able to achieve when the
product is preconditioned as mentioned and host commands are aligned on 4KB boundaries.
Sustained performance as defined as average values seen after 75% of write endurance has been consumed while operating in the
specific workload with all host commands aligned on 4KB boundaries.
Due to the nature of Flash memory technologies there are many factors that can result in values different than those stated in this
specification. Some discrepancies can be caused by bandwidth limitations in the host adapter, operating system, or driver
limitations. It is not the intent of this manual to cover all possible causes of performance discrepancies.
When evaluating performance of SSD devices, it is recommended to measure performance of the device in a method that resembles
the targeted application using real world data and workloads. Test time should also be adequately large to ensure that sustainable
metrics and measures are obtained.
4.3

Start/stop time

The drive accepts the commands listed in the SAS Interface Manual less than 4 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 10 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 5 seconds assuming the drive has been
powered on for 4 minutes prior to last power off event (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. Stop time is 3 seconds (maximum) from removal of DC
power. SCSI stop time is 3 seconds. There is no power control switch on the drive.
Seagate 1200.2 SAS SSD Product Manual, Rev. A
ST800FM0233
Notes
ST800FM0243
[1] 1550/850
190,000/
[2]
[3]
http://www.iometer.org/ or http://sourceforge.net/projects/iometer/.
ST480FM0003
ST480FM0013
2000 MB/s
1750/600
190,000/
20,000 35,000
45,000
ST400FM0303
ST400FM0343
1750/450
190,000/
20,000
19