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Momentus 5400.3 PSD SATA Product Manual, Rev. A
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**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.
2.3 Default logical geometry
Model Formatted capacity* Guaranteed sectors Bytes per sector
ST91608220AS 160 Gbytes 312,581,808 512
ST91208220AS 120 Gbytes 234,441,648 512
ST91008220AS 100 Gbytes 195,371,568 512
ST9808212AS 80 Gbytes 156,301,488 512
ST9608210AS 60 Gbytes 117,210,240 512
Cylinders Read/write heads Sectors per track
16,383 16 63