Table 77 Format Unit Command (F7H); Format Unit (F7H) - Hitachi HDS723020BLA642 Specifications

11.9 Format Unit (F7h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 8 9
CRC UNC 0
0 V 0

Table 77 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 setting by Initialize
Device Parameter (91h) command, Device Configuration Overlay, or Set Max Address (F9h) command, so the
protected area defined by these commands is also initialized.
Security Erase Prepare (F3h) commands 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 to data transfer.
Command execution time depends on drive capacity. To determine command timeout value, Word 89 of Identify
Device data should be referred.
7 6 5 4 3 2 1
- - - - - - -
0 0 0 1 0 0 0
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
1 L 1 D - - -
1 1 1 1 0 1 1
10 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
Hitachi hard disk drive specifications
Command Block Input Registers
0 Register 7
- Data -
1 Error
- Sector Count -
- Sector Number -
- Cylinder Low -
- Cylinder High -
- Device/Head -
1 Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
125
6 5 4 3 2 1 0
- - - - - - -
...See Below...
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
...See Below...
4 3 2 1
DSC DRQ COR IDX ERR
V 0 0 -
0
V