Table 121: Security Erase Unit (F4H); Table 122: Erase Unit Information - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

12.32 Security Erase Unit (F4h)
Table 122: Security Erase Unit (F4h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0 IDN
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, Device Configuration Overlay 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 123: Erase Unit information
Word
00 Control Word
bit 0
bit 1
bit 2-15
01-16 Password (32 bytes)
17-255 Reserved
Identifier
The Security Erase Unit command erases all user data and disables the security mode feature (device lock func-
tion). After the completion 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.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 1 0 0
4 3 2 1
0 ABT T0N AMN
V 0 V 0
Description
: Identifier (1- Master, 0- User)
: Erase mode (1- Enhanced, 0 -
[Enhanced mode is not supported]
: Reserved
Zero indicates that the device should check the supplied password against the user pass-
word stored internally. One indicates that the device should check the given password
against the master password stored internally.
Deskstar T7K500 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 0 V 0
Normal)
203
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