Seagate ST91000641NS ユーザーズマニュアル
Constellation.2 Serial ATA Product Manual, Rev. B
7
3.2
Formatted capacity
Model
Formatted
capacity*
Guaranteed
sectors
Bytes per sector
ST91000640NS
ST91000641NS
ST91000642NS
1000 GB
1,953,525,168
512
ST9500620NS
ST9500621NS
ST9500622NS
500 GB
976,773,168
ST9250610NS
ST9250611NS
ST9250612NS
250 GB
488,397,168
*One GB 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 7.3.1, "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.
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
Recording and interface technology
All models
Interface
Serial ATA (SATA)
Recording method
Perpendicular
Recording density, KBPI (Kb/in max)
1544
Track density, KTPI (Ktracks/in avg)
270
Areal density (Gb/in
2
avg)
417
Spindle speed (RPM) (± 0.2%)
7200
Internal data transfer rate (Mb/s max)
1304
Sustained data transfer rate (MB/s max)
115
I/O data-transfer rate (MB/s max)
600