Security Erase Unit (F4H); Figure 109. Security Erase Unit Command (F4H) - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

12.22 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 109. 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 set by the Initialize Drive Parameter or the Set MAX Address command is ignored. So the protected
area by the Set MAX Address command is also initialized.
This command requests to transfer a single sector data from the host including information specified in
the figure below.
If the password does not match, the device rejects the command with an Aborted error.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 1 0 0
4 3 2 1 0
IDN 0 ABT T0N AMN
V 0 V 0 0
Deskstar 40GV & 75GXP hard disk drive specifications
Command Block Input
Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5 4
BSY RDY DF DSC
0 V 0 V
145
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
3 2 1 0
DRQ COR IDX ERR
– 0 – V