IBM DJSA-210 - Travelstar 10 GB Hard Drive Specifications page 149

H
V
-
In LBA mode this register contains the native max LBA bits 24–27. (L = 1) In the
CHS mode this register contains the native maximum head number. (L = 0)
Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1
by the device.
This indicates that the bit is not used.
Travelstar 32GH/30GT/20GN hard disk drive specifications
135