Hitachi 7K100 - Travelstar - Hard Drive Specifications page 147

LBA High/Low
H
This indicates the cylinder number of the last transferred sector. (L = 0)
In LBA mode, this register contains current LBA bits 8–15 (Mid), 16–23 (High). (L = 1)
This indicates the head number of the last transferred sector. (L = 0)
In LBA mode, this register contains current LBA bits 24–27. (L = 1)
Travelstar 7K100 Hard Disk Drive Specification
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