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Barracuda 7200.8 PATA Product Manual, Rev. F
2.2 Formatted capacity
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.
See Section 4.1.2, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137 Gbytes.
2.3 Default logical geometry
2.4 Recording and interface technology
Model
Formatted
capacity
Guaranteed
sectors Bytes per sector
ST3400832A 400 Gbytes 781,422,768 512
ST3400632A 400 Gbytes 781,422,768 512
ST3300831A 300 Gbytes 586,072,368 512
ST3300631A 300 Gbytes 586,072,368 512
ST3250823A 250 Gbytes 488,397,168 512
ST3250623A 250 Gbytes 488,397,168 512
ST3200826A 200 Gbytes 390,721,968 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Interface ATA
Recording method 16/17 EPRML
Recording density BPI (bits/inch max) 728,000
Track density TPI (tracks/inch avg) 120,000
Areal density (Mbits/inch
2
avg) 91,560
Spindle speed (RPM) (± 0.2%) 7,200
Internal data-transfer rate (Mbytes/sec max) 95
Sustained data transfer rate OD (Mbytes/sec max) 65.0
I/O data-transfer rate (Mbytes/sec max) 100 (Ultra DMA mode 5)
Interleave 1:1
Cache buffer
ST3400832A, ST3300831A, ST3250823A and ST3200826A 8 Mbytes (8,192 kbytes)
ST3400632A, ST3300631A, and ST3250623A 16 Mbytes (16,384 kbytes)