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Seek (7xh)
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
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
-
-
-
-
-
-
-
-
Error
…See Below…
Sector Count
-
-
-
-
-
-
-
-
Sector Count
-
-
-
-
-
-
-
-
Sector Number
V
V
V
V
V
V
V
V
Sector Number
V
V
V
V
V
V
V
V
Cylinder Low
V
V
V
V
V
V
V
V
Cylinder Low
V
V
V
V
V
V
V
V
Cylinder High
V
V
V
V
V
V
V
V
Cylinder High
V
V
V
V
V
V
V
V
Device/Head
1
L
1
D
H
H
H
H
Device/Head
-
-
-
-
H
H
H
H
Command
0
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
0
0
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 212 Seek Command (7xh)
The Seek command initiates a seek to the designated track and selects the designated head. The device need not
be formatted for a seek to execute properly.
Output Parameters To The Device
Sector Number
In LBA mode, this register specifies LBA address bits 0 – 7 for seek. (L=1)
Cylinder High/Low
The cylinder number of the seek.
In LBA mode, this register specifies LBA address bits 8 – 15 (Low), 16 – 23 (High) for seek.
(L=1)
H
The head number of the seek.
In LBA mode, this register specifies LBA address bits 24 – 27 for seek. (L=1)
Input Parameters From The Device
Sector Number
In LBA mode, this register contains current LBA bits 0 – 7. (L=1)
Cylinder High/Low
In LBA mode, this register contains current LBA bits 8 – 15 (Low), 16 – 23 (High). (L=1)
H
In LBA mode, this register contains current LBA bits 24 – 27. (L=1)
257
Western Digital Ultrastar DC HC310 SATA Product Manual