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Chapter 22 Replacing the hard disk
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 provides an overview of the hard disk replacement process.
Figure 122   Hard disk replacement overview
Note: Maintain a current backup of your system
When you replace the hard disk, you need to restore the BCM system programming from 
the backup using the backup and restore utility (BRU). If you do not have a current 
backup, you must reenter configuration data. For further information on how to perform a 
backup or restore, refer to the BCM 4.0 Administration Guide.
Caution: Do not use an electric or magnetized screwdriver near the hard disk. You can 
lose the information stored on the disk. Shock can damage the hard disk. Do not drop or 
hit the hard disk drive.
Warning: You must remove all of the connections to the BCM main unit base function 
tray before you power the system down. Failure to disconnect lines before power down 
can cause damage to the system.
Warning: Protect the hardware components against damage from electrostatic discharge. 
Always wear a grounded wriststrap before you handle components. Always place the 
components in a static-free container.
If possible, do 
a software 
shutdown
Set up unit for 
maintenance
Remove the hard 
disk and replace 
with new disk
Restore unit to 
operation
Test all functions
Perform system 
initialization and a 
BRU data restore