IBM DTCA-24090 Hard Drive Specifications - Page 112

12.5 Format Unit (F7h: Vendor Specific) Command Block Output Registers Register 76543210 Data Feature VVVVVVVV Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11110111 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 000V0V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V 0 V Figure 62. 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 this command completion, and are also used on next power on reset or hard reset. Both previous information are erased from the device by this command. Note that the Format Unit command initializes from LBA 0 to Native MAX LBA. Host MAX LBA set by Initialize Drive Parameter or Set MAX LBA/CYL command is ignored. So the protected area by Set MAX LBA/CYL command is also initialized. The security erase prepare 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. If Feature register is N O T 11h, the device returns Abort error to the host. This command does not request to data transfer. Output Parameters To The Device Feature Destination code for this command. 11H Merge reassigned location into the defect information 104 OEM Specifications of DTCA-2xxxx 2.5 inch H D D