Formatted Capacity; Default Logical Geometry; Lba Mode; Recording And Interface Technology - Seagate BARRACUDA ST31000520AS Product Manual

2.1

Formatted capacity

Formatted
Model capacity*
ST32000542AS 2000 Gbytes
ST31500541AS 1500 Gbytes
ST31000520AS 1000 Gbytes
ST3500412AS 500 Gbytes
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2.1.1

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 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137 Gbytes.
2.2

Default logical geometry

Cylinders Read/write heads
16,383 16
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.
2.3

Recording and interface technology

Interface
Recording method
Recording density (kbits/inch max)
Track density (ktracks/inch avg)
2
Areal density (Gbits/inch
Spindle speed (RPM)
Internal data transfer rate (Mbits/sec max)
Sustained data transfer rate (Mbytes/sec max)
I/O data-transfer rate (Mbytes/sec max)
8
Guaranteed
sectors
3,907,029,168
2,930,277,168
1,953,525,168
976,773,168
Serial ATA (SATA)
Perpendicular
1417 kbits/in max
236 ktracks/in avg
avg) 341.5 Gbits/in
5,900 +/- 0.2%
1285 Mbits/sec max
95 Mbytes/sec max
300 (Mbytes/sec max)
Bytes per sector
512
Sectors per track
63
2
avg
Barracuda LP Series SATA Product Manual, Rev. B