Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
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Cylinder High/Low This indicates the cylinder number of the last transferred sector. (L = 0) In LBA mode this
register contains the current LBA bits 8–15 (Low) and bits 16–23 (High). (L = 1)
H This indicates the head number of the last transferred sector. (L = 0) In LBA mode this
register contains the current LBA bits 24–27. (L = 1)