Initialize Device Parameters (91H); Table 66 Initialize Device Parameters Command (91H) - Hitachi HTS542516K9SA00 Specifications

14.11

Initialize Device Parameters (91h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7 6 5 4
CRC UNC 0 IDN
0 0 0 0

Table 66 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:
Another Initialize Device Parameters command is received.
The device is powered off.
Soft reset occurs and the Set Feature option of CCh is set
Output Parameters To The Device
Sector Count The number of sectors per track. 0 does not mean there are 256 sectors per track, but there is no
sector per track.
H The number of heads minus 1 per cylinder. The minimum is 0 and the maximum is 15.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - H H H H
1 0 0 1 0 0 0 1
3 2 1 0
0 ABT T0N AM
N
0 V 0 0
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5K250 (SATA) OEM Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
Status Register
7 6 5 4
BSY RDY DF DSC DRQ COR IDX ERR
0 0 0 -
7 6 5 4 3 2 1 0
- - - - - - - -
...See Below...
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
...See Below...
3 2 1 0
- 0 0 V