Deskstar T7K500 Hard Disk Drive Specification
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12.9 Format Unit (F7h)
Table 80: 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, 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.
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
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
0V0V0V0 0 0V0V0 0- V
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