( bucko | 2013. 11. 06., sze – 10:22 )

A cél:
- szektor index javítása - ami ugye a szektoron kívül csücsül
- szektorok újra rendezése több hibás szektor esetén

A gyártók nem tartják meg, pl.: Hitachi 7K1000.C specifikáció szerint.
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.