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11.9
Format Track (50h)
Com m and Block Output Registers
Register
7
6
Data
-
-
Feature
-
-
Sector Count
-
-
Sector Number
V
V
Cylinder Low
V
V
Cylinder High
V
V
Device/Head
1
L
Command
0
1
Error Register
7
6
5
4
CRC
UNC
0
IDN
0
0
0
V
Table 110 Format Track Command (50h)
The Format Track command formats a single logical track on the device. Each good sector of data on the track will
be initialized to zero with write operation. At this time, whether the sector of data is initialized correctly is not verified
with read operation. Any data previously stored on the track will be lost.
The host may transfer a sector of data containing a format table to the device. But the device ignores the format table
and writes zero to all sectors on the track regardless of the descriptors.
Since device performance is optimal at 1:1 interleave, and the device uses relative block addressing internally, the
device will always format a track in the same way no matter what sector numbering is specified in the format table.
Output Parameters To The Device
Sector Number
Cylinder High/Low
H
Input Parameters From The Device
Sector Number
Cylinder High/Low
H
Error
In LBA mode, this command formats a single logical track including the specified LBA.
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1
D
H
H
H
H
0
1
0
0
0
0
3
2
1
0
0
ABT
T0N
AMN
0
V
0
0
In LBA mode, this register specifies LBA address bits 0 – 7 to be formatted. (L=1)
The cylinder number of the track to be formatted. (L=0)
In LBA mode, this register specifies LBA address bits 8-15 (Low), 16-23 (High) to be
formatted. (L=1)
The head number of the track to be formatted. (L=0)
In LBA mode, this register specifies LBA address bits 24-27 to be formatted. (L=1)
In LBA mode, this register specifies current LBA address bits 0-7. (L=1)
In LBA mode, this register specifies current LBA address bits 8-15 (Low), 16-23 (High)
In LBA mode, this register specifies current LBA address bits 24-27. (L=1)
The Error Register. An Abort error (ABT=1) will be returned when LBA out of range.
Western Digital Hard Disk Drive OEM Specification
Com m and Block Input Registers
Register
7
6
Data
-
-
Error
Sector Count
-
-
Sector Number
V
V
Cylinder Low
V
V
Cylinder High
V
V
Device/Head
-
-
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC
0
V
0
V
137
5
4
3
2
1
0
-
-
-
-
-
-
...See Below ...
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
-
H
H
H
H
...See Below ...
3
2
1
0
DRQ
COR
IDX
ERR
-
0
-
V
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