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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 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)
Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
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