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10 DiamondMax 21 PATA Product Manual, Rev. B
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
STM3250620A
250 Gbytes 488,397,168
STM3250820A
STM3200820A 200 Gbytes 390,721,968
STM3160215A 160 Gbytes 312,581,808
STM380215A 80 Gbytes 156,301,488
Cylinders Read/write heads Sectors per track
16,383 16 63