Table 68 Device Configuration Overlay Command (B1H); Table 69 Device Configuration Overlay Features Register Values; Device Configuration Overlay (B1H) - Hitachi HDS723020BLA642 Specifications

11.3 Device Configuration Overlay (B1h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Table 68 Device Configuration Overlay Command (B1h)

Individual Device Configuration Overlay feature set commands are identified by the value placed in the Features
register. The table below shows these Features register values.
Value
C0h
C1h
C2h
C3h
other

Table 69 Device Configuration Overlay Features register values

11.3.1 Device Configuration Restore (Subcommand C0h)
The Device Configuration Restore command disables any setting previously made by a Device Configuration
Set command and returns the content of the Identify Device or Identify Packet Device command response to the
original settings as indicated by the data returned from the execution of a Device Configuration Identify
command.
7 6 5 4 3 2 1
- - - - - - -
1 0 1 0 V V V
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
- - - D - - -
1 0 1 1 0 0 0
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
DEVICE CONFIGURATION RESTORE
DEVICE CONFIGURATION FREEZE LOCK
DEVICE CONFIGURATION IDENTIFY
DEVICE CONFIGURATION SET
Reserved
Hitachi hard disk drive specifications
Command Block Input Registers
0 Register 7
- Data -
V Error
- Sector Count V
- Sector Number -
- Cylinder Low V
- Cylinder High V
- Device/Head -
1 Status
Status Register
0 7 6 5
BSY RDY DF
0 V V 0
Command
114
6 5 4 3 2 1
- - - - - -
...See Below...
V V V V V V
- - - - - -
V V V V V V
V V V V V V
- - - - - -
...See Below...
4 3 2 1
DSC DRQ COR IDX ERR
- V - -
0
-
V
-
V
V
-
0
V