Overview of BIOS Features 
83 
3.8  Hard Disk Drive Password Security Feature 
The Hard Disk Drive Password Security feature blocks read and write accesses to the 
hard disk drive until the correct password is given. Hard Disk Drive Passwords are set 
in BIOS SETUP and are prompted for during BIOS POST. For convenient support of S3 
resume, the system BIOS will automatically unlock drives on resume from S3. 
The User hard disk drive password, when installed, will be required upon each power-
cycle until the Master Key or User hard disk drive password is submitted.  
The Master Key hard disk drive password, when installed, will not lock the drive. The 
Master Key hard disk drive password exists as an unlock override in the event that the 
User hard disk drive password is forgotten. Only the installation of the User hard disk 
drive password will cause a hard disk to be locked upon a system power-cycle. 
Table 49 shows the effects of setting the Hard Disk Drive Passwords. 
Table 49.  Master Key and User Hard Drive Password Functions 
Password Set  Password During Boot 
Neither None 
Master only  None 
User only  User only 
Master and User Set  Master or User 
 
During every POST, if a User hard disk drive password is set, POST execution will 
pause with the following prompt to force the user to enter the Master Key or User hard 
disk drive password:  
Enter Hard Disk Drive Password:  
Upon successful entry of the Master Key or User hard disk drive password, the system 
will continue with normal POST. 
If the hard disk drive password is not correctly entered, the system will go back to the 
above prompt. The user will have three attempts to correctly enter the hard disk drive 
password. After the third unsuccessful hard disk drive password attempt, the system 
will halt with the message:  
Hard Disk Drive Password Entry Error  
A manual power cycle will be required to resume system operation. 
 
NOTE 
As implemented on DH61AG, Hard Disk Drive Password Security is only supported on 
SATA port 0. The passwords are stored on the hard disk drive so if the drive is 
relocated to another SATA port or computer that does not support Hard Disk Drive 
Password Security feature, the drive will not be accessible.