Rebuilding the Device Configuration Database

• Custom configuration for x.25, ttys, printers, and so on will be lost. You should save this information before rebuilding the device database.
• Any user-created volume groups will have to be re-added with the command

            importvg -y vgname hdiskx 
  

  vgname is the volume group name and x is the number of any of the hard disks containing the volume group to be added.
• Your system name and possibly other configuration parameters for TCP/IP will be lost. You should save TCP/IP configuration before rebuilding the device database.

Perform the following procedures to replace the current device database with a default minimum configuration database. This new database will be in effect on the next system reboot.

1. Boot from NON_AUTOINSTALL media of the same version as the system and access the rootvg volume group without mounting the file systems.

2. Run the following to mount the /dev/hd2(/usr) file system.

             mount /dev/hd2 /usr
   

3. This step is optional. With the following commands, copy the current system configuration to a backup directory:

             mount /dev/hd4 /mnt 
             mkdir /mnt/etc/objrepos/backup 
             cp /mnt/etc/objrepos/Cu* /mnt/etc/objrepos/backup
             umount /mnt
   

4. Determine what disk or disks the boot image is on.

             lslv -l hd5 
   

5. Save the RAM file-system-based device configuration database to the boot disk or disks. For example:

             savebase -d /dev/hdisk0
   

6. Turn the key to the Normal position, if applicable, and run the following command.

             reboot