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Read Log Ext (2Fh)
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 Low
-
-
-
-
-
-
-
-
Data Low
-
-
-
-
-
-
-
-
Data High
-
-
-
-
-
-
-
-
Data High
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
Feature
Error
...See Below...
Previous
V
V
V
V
V
V
V
V
HOB=0
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
Sector Count
Sector Count
Previous
V
V
V
V
V
V
V
V
HOB=1
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
Sector Number
Sector Number
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
Cylinder Low
Cylinder Low
Previous
V
V
V
V
V
V
V
V
HOB=1
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Current
-
-
-
-
-
-
-
-
Cylinder High
Cylinder High
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Device/Head
1
-
1
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
0
0
1
0
1
1
1
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
V
0
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 142 Read Log Ext Command (2Fh)
This command returns the specified log to the host. The device shall interrupt for each DRQ block transferred.
Output Parameters To The Device
Feature
Log Address Specific
Sector Count Current
The number of sectors to be read from the specified log low order, bits (7:0).
The log transferred by the drive shall start at the sector in the specified log at the
specified offset, regardless of the sector count requested.
Sector Count Previous
The number of sectors to be read from the specified log high orders, bits (15:8).
Sector Number Current
The log to be returned as described in Table 143.
Cylinder Low Current
The first sector of the log to be read low order, bits (7:0).
Cylinder Low Previous
The first sector of the log to be read high order, bits (15:8).
190
Western Digital Ultrastar DC HC310 SATA Product Manual