IBM DBCA-204860 - Travelstar 4.8 GB Hard Drive Specifications page 152

Sector Number In LBA mode, this register contains LBA bits 0 - 7 which is to be input.(L=1)
In CHS mode, this register is ignored. ( L = 0 )
Cylinder High/Low In LBA mode, this register contains LBA bits 8 - 15 (Low),
16 - 23 (High) which is to be set. ( L = 1 )
In CHS mode, this register contains cylinder number which is to be input.(L=0)
H In LBA mode, this register contains LBA bits 24 - 27 which is to be input.(L=1)
In CHS mode, this register is ignored. ( L = 0 )
L LBA mode.Indicates the addressing mo d e.L =0 specifies CHS mode and L = 1 does
LBA addressing mode.
D The device number bit.
should be specified. D = 0 selects the master device and D = 1 selects the slave device.
V Valid. Indicates that the bit is part of an output parameter and should be specified.
- Indicates that the bit is not used.
Input Parameters From The Device
Sector Number In LBA mode, this register contains Adjusted max LBA bits 0 - 7.(L=1)
In CHS mode, this register contains max sector n u m b e r ( = 63). ( L = 0 )
Cylinder High/Low In LBA mode, this register contains Adjusted max LBA bits 8 - 15 (Low),
16 - 23 (High). ( L = 1 )
In CHS mode, this register contains max cylinder number which is set. ( L = 0 )
H In LBA mode, this register contains Adjusted max LBA bits 24 - 27. ( L = 1 )
In CHS mode, this register contains max head n u m b e r ( = 15).(L=0)
V Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by
the device.
- Indicates that the bit is not used.
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O E M Specifications of DBCA-2xxxxx 2.5 inch H D D
Indicates that the device number bit of the Device/Head