Western Digital Ultrastar DC HC310 - Table 141 Read FPDMA Queued Command (60 H)

172
Western Digital Hard Disk Drive OEM Specification
11.22 Read FPDMA Queued (60h)
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
V
V
V
V
Error
...See Below ...
Previous
V
V
V
V
V
V
V
V
Sector Count
Current
V
V
V
V
V
-
-
-
Sector Count
HOB=0
-
-
-
-
-
-
-
-
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Sector Number
Current
V
V
V
V
V
V
V
V
Sector Number
HOB=0
V
V
V
V
V
V
V
V
Previous
V
V
V
V
V
V
V
V
HOB=1
V
V
V
V
V
V
V
V
Cylinder Low
Current
V
V
V
V
V
V
V
V
Cylinder Low
HOB=0
V
V
V
V
V
V
V
V
Previous
V
V
V
V
V
V
V
V
HOB=1
V
V
V
V
V
V
V
V
Cylinder High
Current
V
V
V
V
V
V
V
V
Cylinder High
HOB=0
V
V
V
V
V
V
V
V
Previous
V
V
V
V
V
V
V
V
HOB=1
V
V
V
V
V
V
V
V
Device/Head
V
1
0
0
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
0
1
1
0
0
0
0
0
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
Vs
0
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 141 Read FPDMA Queued Command (60h)
The Read FPDMA command reads one or more sectors of data from disk media, and then transfers the data from
the device to the host.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Output Parameters To The Device
Feature Current
The number of sectors to be transferred low order, bits (7:0).
Feature Previous
The number of sectors to be transferred high order, bits (15:8).
Sector Count Current
TAG (bits 7-3)
The TAG value shall be assigned to be different from all other queued commands.
The value shall not exceed the maximum queue depth specified by the Word 75 of the
Identify Device information.
RARC (bits 0)
If the Rebuild Assist feature is not supported, then the RARC bit shall be ignored.
If the Rebuild Assist feature is supported and is disabled, then the RARC bit shall be
ignored.
If the Rebuild Assist feature is supported and enabled, then the RARC bit specifies
that read operations shall be processed as defined in 9.17.5 Rebuild Assist log (15h).