Security Erase Unit (F4H); Table 108: Security Erase Unit (F4H); Table 109: Erase Unit Information - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

13.28 Security Erase Unit (F4h)

Table 108: Security Erase Unit (F4h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7 6 5
CRC UNC 0
0 0 0
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

Word
00 Control Word
bit 0
bit 1-15
01-16 Password (32 bytes)
17-255 Reserved
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.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 1 1 1 0 1 0 0
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
Description
: Identifier (1- Master, 0- User)
: Reserved
Travelstar 4K120 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 0 V 0
155
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4 3 2 1
COR IDX
V - 0 -
0
ERR
V