Hitachi HTS541680J9SA00 Specifications - Page 117

Travelstar 5K160 (SATA) Hard Disk Drive Specification 14.29 Security Erase Unit (F4h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Command 11110100 Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Status ...See Below... Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 000V0V0 0 Figure 66 Security Erase Unit Command (F4h) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0V0V - 0 0V The Security Erase Unit command initializes all user data sectors, then disables the device lock function. Note that the Security Erase Unit command initializes from LBA 0 to Native Max LBA. Host Max LBA set by Initialize Drive Parameter or Set Max Address command is ignored. So the protected area by Set Max Address command is also initialized. This command requests to transfer a single sector data from the host including information specified in "Erase Unit Information" on Page 5. If the password does not match then the device rejects the command with an Aborted error. Word 00 Description Control word bit 0 : Identifier (1-Mater, 0-User) 01-16 17-255 bit 1-15 Password Reserved : Reserved (32 bytes) Figure 67 Erase Unit Information Identifier Zero indicates that the device should check the supplied password against the user password stored internally. One indicates that the device should check the given password against the master password stored internally. The Security Erase Unit command erases all user data and disables the security mode feature (device lock function). So after completing this command, all user data will be initialized to zero with write operation. At this time, it is not verified with read operation whether the sector of data is initialized correctly. Also, the defective sector information and the reassigned sector information for the device are not updated. The security erase prepare command should be completed immediately prior to the Security Erase Unit command. If the device receives a Security Erase Unit command without a prior Security Erase Prepare command the device aborts the security erase unit command. This command disables the security mode feature (device lock function), however the master password is still stored internally within the device and may be re-activated later when a new user 117/167