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Momentus 5400.2 SATA Product Manual, Rev. C
5
*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
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
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.
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
20,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
Supports Hotplug operation per SATA
II specification
Yes (requires COMPRESET from host after a hotplug event)
Model Formatted capacity Guaranteed sectors Bytes per sector
ST9120821AS 120 Gbytes 234,441,648 512
ST9100824AS 100 Gbytes 195,371,568 512
ST98823AS 80 Gbytes 156,301,488 512
ST96812AS 60 Gbytes 117,210,240 512
ST94813AS 40 Gbytes 78,140,160 512
ST93811AS 30 Gbytes 58,605,120 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Table 1: Drive specifications
Drive specification ST9120821AS ST9100824AS ST98823AS ST96812AS ST94813AS ST93811AS