12 DiamondMax 21 PATA Product Manual, Rev. A
2.2 Formatted capacity
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environ-
ment and formatting.
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
Model
Formatted
capacity*
Guaranteed
sectors Bytes per sector
STM3320820A 320 Gbytes 625,142,448 512
STM3300620A 300 Gbytes 586,072,368 512
STM3250820A 250 Gbytes 488,397,168 512
STM3250620A 250 Gbytes 488,397,168 512
ST3200820A 200 Gbytes 390,721,968 512
Cylinders Read/write heads Sectors per track
16,383 16 63
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