Deskstar 7K400 Hard Disk Drive Specification
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10.8.4.3 Operation from POR after user password is set
When Device Lock Function is enabled, the device rejects media access command until a Security Unlock command
is successfully completed.
Figure 2 : Usual operation for POR
(*1) — refer to the commands in Figure 10.8.5, “Command table” on page 90.
POR
Device Locked mode
Unlock CMD
Command (*1)
Command (*1)
Password
Erase Unit
Password
Match ?
Reject
Complete
Complete
Erase Unit
Lock function
Disable
Normal operation : All commands are available
Freeze Lock command
Enter Device Frozen mode
Normal Operation expect Set Password,
Disable Password, Erase Unit, Unlock commands.
Enter Device
Unlock mode
N
Y
N
Y
Erase Prepare
Media Access
Non-media Access
Match ?
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