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11.16.1 READ LOG DMA EXT (1h)
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
V
V
0
Table 133 READ LOG DMA EXT Subcommand (1h)
Normal Outputs
Upon successful completion of one or more outstanding commands, the device shall transmit a Set Device Bits FIS
with the Interrupt bit set to one and one or more bits set to one in the ACT field corresponding to the bit position for
each command TAG that has completed since the last status notification was transmitted.
Error Outputs
If the device has received a command that has not yet been acknowledged by clearing the BSY bit to zero and an
error is encountered, the device shall transmit a Register Device to Host FIS.
Output Parameters To The Device
Feature Current
Subcommand (bits 4-0)
Subcommand Specific (bits 7-4)
Feature Previous
Sector Count Current
TAG (bits 7-3)
Sector Count Previous
Sector Number Current
Sector Number Previous
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
7
6
5
4
3
2
-
-
-
-
-
-
-
-
-
-
V
V
V
V
0
0
-
-
-
-
-
V
V
V
V
V
-
-
-
-
-
V
V
V
V
V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
-
0
-
0
1
1
0
0
0
4
3
2
1
0
ABT
T0N
V
0
V
0
Contents of READ LOG DMA EXT Count(7:0) field
When bits (4:0) is 01h, Read Log DMA Ext Subcommand.
Contents of READ LOG DMA EXT Count(15:8) field
Contents of READ LOG DMA EXT LBA(7:0) field
Contents of READ LOG DMA EXT LBA(31:24) field
Contents of READ LOG DMA EXT LBA(15:8) field
Contents of READ LOG DMA EXT LBA(39:32) field
Contents of READ LOG DMA EXT LBA(23:16) field
Western Digital Hard Disk Drive OEM Specification
Com m and Block Input Registers
1
0
Register
-
-
-
Data Low
-
-
-
Data High
0
1
Error
-
-
-
-
-
-
Sector Count
-
-
-
-
-
-
Sector Number
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
Cylinder High
-
-
-
-
-
-
Device/Head
1
1
Status
0
7
6
AMN
BSY
RDY
0
0
V
161
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
-
0
-
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
0
IDX
ERR
-
V
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