LED 552, 554, and 556 SUPERBLOCK CORRUPTED

1. Repeat steps 1 through 2 for LEDs 551, 555, and 557.

2. If fsck indicates that block 8 is corrupted, the super block for the file system iscorrupted and needs to be repaired. Enter the command:dd count=1 bs=4k skip=31 seek=1 if=/dev/hdn of=/dev/hdnwhere n is the number of the file system.

3. Rebuild your JFS log by using the command:/usr/sbin/logform /dev/hd8

4. If this solves the problem, stop here; otherwise, continue with step 5.

5. Your ODM database is corrupted. Restart your system and follow the proceduregiven in 4.4.2, “Accessing a system that will not boot” on page 105 to access rootvgwith choice 2 on the Volume Group Information screen.

6. Mount the root and usr file systems as follows:mount /dev/hd4 /mntmount /usr

7. Copy the system configuration to a back up directory:mkdir /mnt/etc/objrepos/backupcp /mnt/etc/objrepos/Cu* /mnt/etc/objrepos/backup

8. Copy the configuration from the RAM file system as follows:cp /etc/objrepos/Cu* /mnt/etc/objrepos

9. Unmount all file systems by using the umount all command.

10. Determine the boot disk by using the lslv -m hd5 command.

11. Save the clean ODM to the boot logical volume by using the command:savebase -d/dev/hdisknwhere n is the disk number of the disk containing boot logical volume.

12. Reboot, if the system does not come up, and reinstall BOS.