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Deskstar 7K400 Hard Disk Drive Specification
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12.9 Format Unit (F7h)
Table 88: Format Unit command (F7h)
The Format Unit command initializes all user data sectors after merging the reassigned sector location into the
defect information of the device and clearing the reassign information. Both new reassign information and new
defect information are available immediately after the completion of this command and are also used on the next
power-on reset or hard reset. This command erases both previous information data from the device.
Note that the Format Unit command initializes from LBA 0 to Native MAX LBA regardless of the setting by the
Initialize Device Parameter (91h) command or the Set Max Address (F9h) command, so that the protected area
defined by these commands is also initialized.
The Security Erase Prepare (F3h) command should be completed immediately prior to the Format Unit command.
If the device receives a Format Unit command without a prior Security Erase Prepare command, the device aborts
the Format Unit command.
All values in Feature register are reserved and any values other than 11h should not be put into Feature register.
This command does not request a data transfer.
Command execution time depends on drive capacity.
To determine the command time-out value, refer to Word 89 of Identify Device data.
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
0 0 0 1 0 0 0 1
Error
see below
Sector Count
- - - - - - - -
Sector Count
- - - - - - - -
Sector Number
- - - - - - - -
Sector Number
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder High
- - - - - - - -
Device/Head
1 L 1 D - - - -
Device/Head
- - - - - - - -
Command
1 1 1 1 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
V
0
V
0
V
0
0
0
V
V
V
0
0
-
V
Summary of Contents for Deskstar 7K400
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