IBM DTNA-22160 - Travelstar 2.1 GB Hard Drive Specifications page 135

Output Parameters To The Device
B
Sector Number
Cylinder High/Low
|
H
L
D
V
-
Input Parameters From The Device
| Sector Number
|
| Cylinder High/Low
|
|
| H
|
V
-
Option bit for selection whether nonvolatile or volatile. B = 0 is volatile condition.
When B = 1 , MAX LBA/CYL which is set by Set Max LBA/CYL command is pre-
served by P O R and H A R D RESET. When B = 0 , MAX LBA/CYL which is set by
Set Max LBA/CYL command will be lost by P O R and H A R D RESET.
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 )
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)
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 )
LBA mode.Indicates the addressing m od e. L=0 specifies CHS mode and L = 1 does
LBA addressing mode.
The device number bit.
should be specified. D = 0 selects the master device and D = 1 selects the slave device.
Valid. Indicates that the bit is part of an output parameter and should be specified.
Indicates that the bit is not used.
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 )
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 )
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)
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.
Indicates that the device number bit of the Device/Head
127
Command Descriptions