Seagate 7200.8 PATA, ST3250623A, ST3300631A Formatted capacity, Default logical geometry, LBA mode

2.2Formatted capacity

	Formatted	Guaranteed
Model	capacity	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

2.2.1LBA 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.

2.3Default logical geometry

Cylinders	Read/write heads	Sectors per track
16,383	16	63

2.4	Recording and interface technology
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/inch2 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)

10 Barracuda 7200.8 PATA Product Manual, Rev. F