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6 Momentus 7200.3 SATA Product Manual, Rev. C
2.3 Default logical geometry
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
2.5 Recording and interface technology
Cylinders Read/write heads Sectors per track
16,383 16 63
Drive model Read/write heads Number of discs
ST9320421AS and ST9320421ASG 4 2
ST9250421AS and ST9250421ASG 3 2
ST9200421AS and ST9200423ASG 3 2
ST9160411AS and ST9160411ASG 2 1
ST9120411AS and ST9120411ASG 2 1
ST980411AS and ST980411ASG 1 1
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density BPI (bits/inch max) 1,334k
Track density TPI (tracks/inch max) 190k
Areal density (Gbits/inch
2
max) 253
Spindle speed (RPM) (± 0.2%) 7,200
Maximum Internal transfer rate (Gbits/sec) 1.1
I/O data-transfer rate (Gbits/sec max) 3.0
Interleave 1:1
Cache buffer 16 Mbytes (16,384 kbytes)