Seagate ST980412AS ユーザーズマニュアル
Momentus 7200.4 SATA Product Manual, Rev. C
5
2.2
Formatted capacity
Model
Formatted capacity*
Guaranteed sectors
Bytes per sector
ST9500420AS and ST9500420ASG
500 Gbytes
976,773,168
512
ST9320423AS and ST9320423ASG
320 Gbytes
625,142,448
512
ST9250410AS and ST9250410ASG
250 Gbytes
488,397,168
512
ST9160412AS and ST9160412ASG
160 Gbytes
312,581,808
512
ST9120410AS and ST9120410ASG
120 Gbytes
234,441,648
512
ST980412AS and ST980412ASG
80 Gbytes
156,301,488
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.
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.
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.
where n is the number of guaranteed sectors as defined above.
2.4
Physical organization
Drive model
Read/write heads
Number of discs
ST9500420AS and ST9500420ASG
4
2
ST9320423AS and ST9320423ASG
3/4
2
ST9250410AS and ST9250410ASG
2
1
ST9160412AS and ST9160412ASG
2
1
ST9120410AS and ST9120410ASG
1/2
1
ST980412AS and ST980412ASG
1
1