Security Erase Unit (F4H); Figure 108. Security Erase Unit Command (F4H); Figure 109. Erase Unit Information - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

13.22 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
0 0 0

Figure 108. 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. 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 Figure 109.
If the password does not match, the device rejects the command with an Aborted error.
Word
00
01-16
17-255

Figure 109. Erase Unit information

7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 1 0 0
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
Description
Control Word
bit 0
bit 1–15 : Reserved
Password
Reserved
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
: Identifier (1- Master, 0- User)
( 32 bytes )
150
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4 3 2 1 0
DSC DRQ COR IDX ERR
V - 0 - V