13.11 Initialize Device Parameters (91h)
see belowStatus1 0 0 1 0 0 0 1Command
- - - - - - - -Device/Head1 - 1 D H H H HDevice/Head
- - - - - - - -Cylinder High- - - - - - - -Cylinder High
- - - - - - - -Cylinder Low- - - - - - - -Cylinder Low
- - - - - - - -Sector Number- - - - - - - -Sector Number
- - - - - - - -Sector CountV V V V V V V VSector Count
- - - - - - - -Error- - - - - - - -Feature
- - - - - - - -Data- - - - - - - -Data
7 6 5 4 3 2 1 0Register7 6 5 4 3 2 1 0Register
Command Block Input RegistersCommand Block Output Registers
V-0--00000V00000
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCCRC
0123456701234567
Status RegisterError Register
Figure 96. Initialize Device Parameters command (91h)
The Initialize Device Parameters command enables the host to set the number of sectors per track and
the number of heads minus 1, per cylinder. Words 54–58 in Identify Device Information reflects these
parameters.
The parameters remain in effect until the following events occur:
! Another Initialize Device Parameters command is received.
! The device is powered off.
! A hard reset occurs.
! A soft reset occurs and the Set Feature option of CCh is set.
Input parameters to the device
Sector Count This indicates the number of sectors per track. Zero (0) does not mean that there
are 256 sectors per track. It means that there are no sectors per track.
H This indicates the number of heads minus 1 per cylinder. The minimum is 0 and
the maximum is 15.
Travelstar 60GH & 40GN hard disk drive specifications
133
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