Seagate ST9250412AS Momentus 7200 FDE.2 SATA Product Manual - Page 12

Formatted capacity, Default logical geometry, Physical organization

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*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 Model ST9500426ASG, ST9500422AS and ST9500421AS ST9320427ASG, ST9320426ASG and ST9320426AS ST9250464ASG, ST9250414ASG, ST9250412AS and ST9250411AS ST9160419ASG, ST9160418ASG and ST9160413AS Formatted capacity* 500 Gbytes 320 Gbytes 250 Gbytes 160 Gbytes Guaranteed sectors 976,773,168 625,142,448 488,397,168 312,581,808 Bytes per sector 512 512 512 512 *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 4.2.5, "Identify Device command" (words 60-61 and 100-103) for additional information about 48bit addressing support of drives with capacities over 137 Gbytes. 2.3 Default logical geometry Cylinders 16,383 Read/write heads 16 Sectors per track 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. 2.4 Physical organization Drive model ST9500426ASG, ST9500422AS and ST9500421AS ST9320427ASG, ST9320426ASG and ST9320426AS ST9250464ASG, ST9250414ASG, ST9250412AS and ST9250411AS ST9160419ASG, ST9160418ASG and ST9160413AS Read/write heads 4 3/4 2 2 Number of discs 2 2 1 1 6 Momentus 7200 FDE.2 SATA Product Manual, Rev. B

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6
Momentus 7200 FDE.2 SATA Product Manual, Rev. B
*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
Model
Formatted
capacity*
Guaranteed
sectors
Bytes per
sector
ST9500426ASG, ST9500422AS and ST9500421AS
500 Gbytes
976,773,168
512
ST9320427ASG, ST9320426ASG and ST9320426AS
320 Gbytes
625,142,448
512
ST9250464ASG, ST9250414ASG, ST9250412AS and ST9250411AS
250 Gbytes
488,397,168
512
ST9160419ASG, ST9160418ASG and ST9160413AS
160 Gbytes
312,581,808
512
*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 4.2.5, "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
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
.
2.4
Physical organization
Drive model
Read/write heads
Number of discs
ST9500426ASG, ST9500422AS and ST9500421AS
4
2
ST9320427ASG, ST9320426ASG and ST9320426AS
3/4
2
ST9250464ASG, ST9250414ASG, ST9250412AS and ST9250411AS
2
1
ST9160419ASG, ST9160418ASG and ST9160413AS
2
1