15.5 Format Unit (F7h)
see below
Status
1 1 1 1 0 1 1 1
Command
- - - - - - - -
Device/Head
1 L 1 D - - - -
Device/Head
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder Low
- - - - - - - -
Sector Number
- - - - - - - -
Sector Number
- - - - - - - -
Sector Count
- - - - - - - -
Sector Count
see below
Error
0 0 0 1 0 0 0 1
Feature
- - - - - - - -
Data
- - - - - - - -
Data
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Register
Command Block Input
Registers
Command Block Output
Registers
V–00VVV0V0V0V0V0
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCCRC
0123456701234567
Status RegisterError Register
Figure 82. Format Unit Command (F7h)
The Format Unit command initializes all user data sectors after merging 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 right after command completion of this command. Previous
information of reassign and defect are erased from the device by executing this command.
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.
Security Erase Prepare (F3h) command should be completed just 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 command time-out value, Word 89 of
Identify Device data should be referred.
Deskstar 60 GXP Hard disk drive specification
110
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