Formatted Capacity; Lba Mode; Default Logical Geometry - Seagate Momentus 5400.4 ST9120817AS Product Manual

**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

Model Formatted capacity*
ST9250827AS 250 Gbytes
ST9200827AS 200 Gbytes
ST9160827AS 160 Gbytes
ST9120817AS 120 Gbytes
*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

Cylinders Read/write heads
16,383 16
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.
Momentus 5400.4 SATA Product Manual, Rev. A
Guaranteed sectors
488,397,168
390,721,968
312,581,808
234,441,648
Sectors per track
63
Bytes per sector
512
512
512
512
5