Seagate ST9100824AS, ST98823AS, ST96812AS Formatted capacity, Default logical geometry, LBA mode

Table 1:	Drive specifications
Drive specification		ST9120821AS	ST9100824AS	ST98823AS	ST96812AS	ST94813AS	ST93811AS
Load/Unload (U/UL) cycles
25°C, 50% relative humidity		600,000 software-controlled power on/off cycles
32°C, 80% relative humidity		20,000 hard power on/off cycles
5°C, 80% relative humidity		600,000 software-controlled power on/off cycles
5°C, 10% relative humidity		20,000 hard power on/off cycles
55°C, 16% relative humidity
Supports Hotplug operation per SATA		Yes (requires COMPRESET from host after a hotplug event)
II specification

*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.

2.2Formatted capacity

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

2.2.1LBA 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.

2.3Default logical geometry

Cylinders	Read/write heads	Sectors per track
16,383	16	63

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 5400.2 SATA Product Manual, Rev. C 5