IBM IC25N020ATDA04 Hard Drive Specifications - Page 128

Device Configuration Overlay B1h, 2.1 DEVICE CONFIGURATION RESTORE subcommand C0h

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13.2 Device Configuration Overlay (B1h) Command Block Output Registers Register 76543210 Data -------- Feature 1010VVVV Sector Count Sector Number -------- Cylinder Low Cylinder High -------- Device/Head - - - D - - - - Command 10110001 Command Block Input Registers Register 76543210 Data - ------- Error ...See Below... Sector Count V V V V V V V V Sector Number -------- Cylinder Low V V V V V V V V Cylinder High VVVVVVVV Device/Head Status ...See Below... Error Register 7 65432 1 0 CRC UNC 0 IDN 0 ABT T0N AMN 0 0000V 0 0 Status Register 765432 1 0 BSY RDY DF DSC DRQ COR IDX ERR VVV-V- - V Figure 76. Device Configuration Overlay (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 Command DEVICE CONFIGURATION RESTORE DEVICE CONFIGURATION FREEZE LOCK DEVICE CONFIGURATION IDENTIFY DEVICE CONFIGURATION SET Reserved Figure 77. Device Configuration Overlay Features register values 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. Travelstar 48GH, 30GN & 15GN hard disk drive specifications 114

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13.2 Device Configuration Overlay (B1h)
...See Below...
Status
1
0
0
0
1
1
0
1
Command
-
-
-
-
-
-
-
-
Device/Head
-
-
-
-
D
-
-
-
Device/Head
V
V
V
V
V
V
V
V
Cylinder
High
-
-
-
-
-
-
-
-
Cylinder
High
V
V
V
V
V
V
V
V
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
-
-
Sector
Number
-
-
-
-
-
-
-
-
Sector
Number
V
V
V
V
V
V
V
V
Sector Count
-
-
-
-
-
-
-
-
Sector Count
...See Below...
Error
V
V
V
V
0
1
0
1
Feature
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Data
0
1
2
3
4
5
6
7
Register
0
1
2
3
4
5
6
7
Register
Command Block Input Registers
Command Block Output Registers
V
-
-
V
-
V
V
V
0
0
V
0
0
0
0
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 76. Device Configuration Overlay (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.
Reserved
other
DEVICE CONFIGURATION SET
C3h
DEVICE CONFIGURATION IDENTIFY
C2h
DEVICE CONFIGURATION FREEZE LOCK
C1h
DEVICE CONFIGURATION RESTORE
C0h
Command
Value
Figure 77. Device Configuration Overlay Features register values
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.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
114