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Momentus 7200.3 SATA Product Manual, Rev. C 5
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
2.2 Formatted capacity
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2.2.1 LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,
where n is the number of guaranteed sectors as defined above.
See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137 Gbytes.
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
Warranty 5 years on distribution units.
To determine the warranty for a specific drive, use a web browser to access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be asked to provide the drive serial num-
ber, model number (or part number) and country of purchase. The system will display the warranty infor-
mation for your drive.
Supports Hotplug opera-
tion per Serial ATA Revision
2.6 specification
Yes (requires COMRESET from host after a hotplug event)
Model Formatted capacity* Guaranteed sectors Bytes per sector
ST9320421AS and ST9320421ASG 320 Gbytes 625,142,448 512
ST9250421AS and ST9250421ASG 250 Gbytes 488,397,168 512
ST9200421AS and ST9200423ASG 200 Gbytes 390,721,968 512
ST9160411AS and ST9160411ASG 160 Gbytes 312,581,808 512
ST9120411AS and ST9120411ASG 120 Gbytes 234,441,648 512
ST980411AS and ST980411ASG 80 Gbytes 156,301,488 512
Table 1: Drive specifications
Drive specification
ST9320421AS
ST9320421ASG
ST9250421AS
ST9250421ASG
ST9200421AS
ST9200423ASG
ST9160411AS
ST9160411ASG
ST9120411AS
ST9120411ASG
ST980411AS
ST980411ASG