Format Unit (F7H: Vendor Specific); Figure 84. Format Unit Command (F7H) - IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications

13.7 Format Unit (F7h: vendor specific)

Command Block Output Registers
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 84. 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 infor-
mation and new defect information are available right after the completion of this command. They 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. Host MAX LBA is set by
Initialize Drive Parameter or Set MAX ADDRESS command is ignored. The protected area by Set MAX
ADDRESS command is also initialized.
The Security Erase Prepare command should be completed immediately prior to the Format Unit com-
mand. If the device receives a Format Unit command without a prior Security Erase Prepare command,
the device aborts the Format Unit command.
If the Feature register is NOT 11h, the device returns an Abort error to the host.
This command does not request a data transfer.
Output parameters to the device
Feature
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 1 1 1
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
This indicates the Destination code for this command.
11H The merge reassigned location into the defect information.
Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
120
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4 3 2 1
DSC DRQ COR IDX ERR
V - 0 - V
0