Hitachi HDS728080PLAT20 Specifications - Page 136

Format Track 50h

Page 136 highlights

12.8 Format Track (50h) Table 83: Format Track command (50h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number 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 Device/Head 1 L 1 D H H H H Command 0 1 0 1 0 0 0 0 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 0V 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number 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 Device/Head - - - - H H H H Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V 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 the write operation. At this time, the read operation does not verify the correct initialization of the data sector. 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 In LBA mode this register specifies that LBA address bits 0-7 are to be formatted. (L=1). Cylinder High/Low This indicates the cylinder number of the track to be formatted. (L = 0) In LBA mode this register specifies that LBA address bits 8-15 (Low) and bits 16-23 (High) are to be formatted. (L = 1) H This indicates the head number of the track to be formatted (L = 0). In LBA mode this reg- ister specifies that LBA address bits 24-27 are to be formatted. (L= 1) Deskstar 7K80 Hard Disk Drive Specification 132

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Deskstar 7K80 Hard Disk Drive Specification
132
12.8
Format Track (50h)
Table 83: 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 the write operation. At this time, the read operation does not verify the correct initializa-
tion of the data sector. 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
In LBA mode this register specifies that LBA address bits 0–7 are to be formatted. (L=1).
Cylinder High/Low
This indicates the cylinder number of the track to be formatted. (L = 0)
In LBA mode this register specifies that LBA address bits 8–15 (Low) and bits 16–23
(High) are to be formatted. (L = 1)
H
This indicates the head number of the track to be formatted (L = 0). In LBA mode this reg-
ister specifies that LBA address bits 24–27 are to be formatted. (L= 1)
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 0 1 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
0
0
0
V
0
V
0
0
0
V
0
V
-
0
-
V