Table 79: Format Unit Command (F7H); Format Unit (F7H) - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

12.9 Format Unit (F7h)

Table 80: Format Unit command (F7h)
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 IDN
0 V 0
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, Device Configuration Overlay or the Set Max Address (F9h) com-
mand, 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 should be referred.
7 6 5 4 3 2 1 0
- - - - - - - -
0 0 0 1 0 0 0 1
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 L 1 D - - - -
1 1 1 1 0 1 1 1
4 3 2 1 0
0 ABT T0N AMN
V 0 V 0 0
Deskstar T7K500 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5 4
BSY RDY DF DSC DRQ
0 V 0 V
147
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
3 2 1 0
COR IDX ERR
0 0 - V