Table of Contents
Advertisement
11.64 Write Log Ext (3Fh)
Com m and Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector Count
Previous
Current
Sector Number
Previous
Current
Cylinder Low
Previous
Current
Cylinder High
Previous
Device/Head
Command
Error Register
7
6
5
CRC
UNC
0
IDN
0
V
0
Table 255 Write Log Ext Command (3Fh)
This command writes a specified number of 512 byte data sectors to the specific log. The device shall interrupt for
each DRQ block transferred.
Output Parameters To The Device
Sector Count Current
Sector Count Previous
Sector Number Current
Cylinder Low Current
Cylinder Low Previous
If the feature set associated with the log specified in the Sector Number regis ter is not supported or enabled, or if the
values in the Sector Count, Sector Number or Cylinder Low registers are invalid, the device shall return command
aborted. If the host attempts to write to a read only log address, the device shall return command aborted.
7
6
5
4
3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
-
-
-
-
-
-
-
1
-
1
D
-
-
0
0
1
1
1
1
4
3
2
1
0
ABT
T0N
V
0
V
0
The number of sectors to be written to the specified log low order, bits (7:0).
The number of sectors to be written to the specified log high orders, bits (15:8). If the
number of sectors is greater than the number indicated in the Log directory, which is
available in Log number zero, the device shall return command aborted. The log
transferred to the device shall be stored by the device starting at the first sector in the
specified log.
The log to be written as described in Table 143 Log address definition. If the host
attempts to write to a read only log address, the device shall return command
aborted.
The first sector of the log to be written low order, bits (7:0).
The first sector of the log to be written high order, bits (15:8).
Western Digital Hard Disk Drive OEM Specification
Com m and Block Input Registers
2
1
0
Register
-
-
-
Data Low
-
-
-
Data High
-
-
-
Error
-
-
-
V
V
Sector Count
V
V
V
V
Sector Number
-
-
-
V
V
Cylinder Low
V
V
-
-
-
Cylinder High
-
-
-
-
-
Device/Head
1
1
Status
0
7
6
AMN
BSY
RDY
0
0
V
293
7
6
5
4
-
-
-
-
-
-
-
-
...See Below ...
HOB=0
-
-
-
-
HOB=1
-
-
-
-
HOB=0
-
-
-
-
HOB=1
-
-
-
-
HOB=0
-
-
-
-
HOB=1
-
-
-
-
HOB=0
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
...See Below ...
Status Register
5
4
3
2
DF
DSC
DRQ
COR
0
V
-
0
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
0
IDX
ERR
-
V
Advertisement
Table of Contents
