IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Figure 66. Usual Operation

11.8.5.3 Operation from POR after user password is set
When the Device Lock Function is enabled, the device rejects the media access command until a
Security Unlock command is successfully completed.
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 ?
(*1) — refers to the commands in Figure 68, "Command table for device lock operation" on
pages 92 and 93.
Figure 66. Usual operation
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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