Device Configuration Overlay (B1H); Device Configuration Restore (Subcommand C0H); Table 57. Device Configuration Overlay Command (B1H); Table 58. Device Configuration Overlay Features Register Values - Hitachi 7K100 - Travelstar - Hard Drive Specifications

13.2 Device Configuration Overlay (B1h)

Table 57: Device Configuration Overlay Command (B1h)
Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7 6 5
CRC UNC 0
0 0 0
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.
Table 58: Device Configuration Overlay Features register values
Value
C0h DEVICE CONFIGURATION RESTORE
C1h DEVICE CONFIGURATION FREEZE LOCK
C2h DEVICE CONFIGURATION IDENTIFY
C3h DEVICE CONFIGURATION SET
other Reserved

13.2.1 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.
13.2.2 DEVICE CONFIGURATION FREEZE LOCK (subcommand C1h)
The DEVICE CONFIGURATION FREEZE LOCK command prevents accidental modification of the Device Con-
figuration Overlay settings. After successful execution of a DEVICE CONFIGURATION FREEZE LOCK com-
mand, all DEVICE CONFIGURATION SET, DEVICE CONFIGURATION FREEZE LOCK, DEVICE
CONFIGURATION IDENTIFY, and DEVICE CONFIGURATION RESTORE commands are aborted by the
device. The DEVICE CONFIGURATION FREEZE LOCK condition shall be cleared by a power-down. The
DEVICE CONFIGURATION FREEZE LOCK condition shall not be cleared by hardware or software reset.
7 6 5 4 3 2 1 0
- - - - - - - -
1 0 1 0 V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 0 1 1 0 0 0 1
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Command
Travelstar 7K100 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Low
LBA High
Device
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 V V 0
99
7 6 5 4 3 2 1 0
- - - - - - - -
see below
V V V V V V V V
- - - - - - - -
V V V V V V V V
V V V V V V V V
- - - - - - - -
see below
Status Register
4 3 2 1
COR IDX
- V - -
0
ERR
V