Hitachi HTS541040G9AT00 Specifications - Page 136

Initialize Device Parameters 91h

Page 136 highlights

13.11 Initialize Device Parameters (91h) Table 81: Initialize Device Parameters command (91h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V LBA Low LBA Mid LBA High Device 1 - 1 D H H H H Command 1 0 0 1 0 0 0 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error Sector Count LBA Low LBA Mid LBA High Device Status see below 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 00- - 0 - V 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. Output parameters to the device Sector Count This indicates the number of sectors per track. Zero (0) indicates 0 sectors per track instead of 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 maxi- mum is 15. Travelstar 5K100 Hard Disk Drive Specification 122

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Travelstar 5K100 Hard Disk Drive Specification
122
13.11
Initialize Device Parameters (91h)
Table 81: 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.
Output parameters to the device
Sector Count
This indicates the number of sectors per track. Zero (0)
indicates 0 sectors per track
instead of 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 maxi-
mum is 15.
Command Block Output Registers
Command Block Input Registers
Register
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Data
- - - - - - - -
Data
- - - - - - - -
Feature
- - - - - - - -
Error
- - - - - - - -
Sector Count
V V V V V V V V
Sector Count
- - - - - - - -
LBA Low
- - - - - - - -
LBA Low
- - - - - - - -
LBA Mid
- - - - - - - -
LBA Mid
- - - - - - - -
LBA High
- - - - - - - -
LBA High
- - - - - - - -
Device
1 - 1 D H H H H
Device
- - - - - - - -
Command
1 0 0 1 0 0 0 1
Status
see below
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC 0 IDN 0 ABT T0N AMN
BSY RDY DF DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
0
0
-
-
0
-
V