Western Digital Ultrastar DC HC310, Specifications

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234
Western Digital Hard Disk Drive OEM Specification
11.40 Security Erase Unit (F4h)
Com m and Block Output Registers Com m and Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature - - - - - - - - Error
…See Below …
Sector Count - - - - - - - - Sector Count - - - - - - - -
Sector Number - - - - - - - - Sector Number - - - - - - - -
Cylinder Low - - - - - - - - Cylinder Low - - - - - - - -
Cylinder High - - - - - - - - Cylinder High - - - - - - - -
Device/Head 1 - 1 D - - - - Device/Head - - - - - - - -
Command 1 1 1 1 0 1 0 0 Status
…See Below …
Error Register Status Register
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
0 0 0 V 0 V 0 0 0 V 0 V - 0 - V
Table 203 Security Erase Unit Command (F4h)
The Security Erase Unit command initializes all user data sectors, and 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, Device Configuration Overlay, 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 Table 203 on
the page 234.
When security is disabled and the Identifier bit is set to User, then the device shall return command aborted.
If the password does not match, then the device rejects the command with an Aborted error.
Word Description
00 Control word
bit 0 : Identifier (1-Mater, 0-User)
bit 1 : Erase mode (1- Enhanced, 0- Normal)
Enhanced mode is not supported
bit 2-15 : Reserved
01-16 Password (32 bytes)
17-255 Reserved
Table 204 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