Hitachi HTS421210H9AT00, Specifications

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Travelstar 4K120 Hard Disk Drive Specification
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13.28 Security Erase Unit (F4h)
Table 108: Security Erase Unit (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. The Host MAX LBA is
set by the Initialize Drive Parameter or the Set MAX ADDRESS command is ignored. The protected area by the
Set MAX ADDRESS command is also initialized.
This command requests the transfer of a single sector of data from the host including information specified in the
table below.
If the password does not match, the device rejects the command with an Aborted error.
Table 109: 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 pass-
word stored internally.
The Security Erase Unit command erases all user data and disables the security mode feature (device lock func-
tion). After completing of this command, all the user data will be initialized to zero with a write operation. At this
time, the data write is not verified with a read operation to determine if the data sector is initialized correctly. At
this time 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.
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 - - - - - - - - Error see below
Sector Count - - - - - - - - Sector Count - - - - - - - -
LBA Low - - - - - - - - LBA Low - - - - - - - -
LBA Mid - - - - - - - - LBA Mid - - - - - - - -
LBA High - - - - - - - - LBA High - - - - - - - -
Device - - - D - - - - Device - - - - - - - -
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
Word Description
00 Control Word
bit 0 : Identifier (1- Master, 0- User)
bit 1-15 : Reserved
01-16 Password (32 bytes)
17-255 Reserved