Seagate ST9750420ASG ユーザーズマニュアル
6
Momentus Product Manual, Rev. C
3.2
Formatted capacity
Model
Formatted capacity*
Guaranteed sectors
Bytes per sector
(logical)
(logical)
ST9750423AS, ST9750423ASG,
ST9750422AS, ST9750420AS and
ST9750420ASG
ST9750422AS, ST9750420AS and
ST9750420ASG
750GB
1,465,149,168
512
ST9640424AS, ST9640423AS and
ST9640423ASG
ST9640423ASG
640GB
1,250,263,728
ST9500424AS, ST9500423AS and
ST9500423ASG
ST9500423ASG
500GB
976,773,168
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
3.2.1
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 5.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137GB.
bit addressing support of drives with capacities over 137GB.
3.3
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.
3.4
Physical organization
Drive model
Read/write heads
Number of discs
ST9750423AS, ST9750423ASG, ST9750422AS,
ST9750420AS and ST9750420ASG
4
2
ST9640424AS, ST9640423AS and ST9640423ASG
ST9500424AS, ST9500423AS and ST9500423ASG
4/3