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READ LOG DMA EXT (1h)
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
-
-
-
-
-
-
-
-
Feature
Current
V
V
V
V
0
0
0
1
Error
...See Below...
Previous
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Sector Count
Current
V V V V V -
-
-
Sector Count
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Sector Number
Current
V V V V V
-
-
-
Sector Number
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
HOB=0
-
-
-
-
-
-
-
-
Cylinder Low
Current
-
-
-
-
-
-
-
-
Cylinder Low
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Cylinder High
Current
-
-
-
-
-
-
-
-
Cylinder High
HOB=0
-
-
-
-
-
-
-
-
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Device/Head
-
1
-
0
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
0
1
1
0
0
0
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
V
V
0
V
0
V
0
0
0
V
0
-
0
-
-
V
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
Contents of READ LOG DMA EXT Count(7:0) field
Subcommand (bits 4-0)
When bits (4:0) is 01h, Read Log DMA Ext Subcommand.
Subcommand Specific (bits 7-4)
Feature Previous
Contents of READ LOG DMA EXT Count(15:8) field
Sector Count Current
TAG (bits 7-3)
Sector Count Previous
Sector Number Current
Contents of READ LOG DMA EXT LBA(7:0) field
Sector Number Previous
Contents of READ LOG DMA EXT LBA(31:24) field
Cylinder Low Current
Contents of READ LOG DMA EXT LBA(15:8) field
Cylinder Low Previous
Contents of READ LOG DMA EXT LBA(39:32) field
Cylinder High Current
Contents of READ LOG DMA EXT LBA(23:16) field
177
Western Digital Ultrastar DC HC310 SATA Product Manual