Format Track (50H); Figure 89. Format Track Command (50H) - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

12.4 Format Track (50h)

Command Block Output
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 89. 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 the sector of data is not verified with read
operation whether the sector of data is initialized correctly. 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 in-
ternally, the device will always format a track in the same way no matter what sector numbering is speci-
fied in the format table.
Output parameters to the device
Sector Number
Cylinder High/Low The cylinder number of the track to be formatted. (L=0)
H
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
0 1 0 1 0 0 0 0
4 3 2 1
IDN 0 ABT T0N
V 0 V 0
In LBA mode this register specifies LBA address bits 0-7 to be formatted. (L=1)
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)
Deskstar 40GV & 75GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6
AMN BSY RDY DF
0 0 V
112
Registers
7 6 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 V V V V V V
- - - - H H H H
see below
5 4 3 2 1
DSC DRQ COR IDX
V V – 0 –
0
ERR
V