Technical information

Technician’s Handbook
140
Recovering from a Corrupted Hard Disk
To determine whether your hard disk is corrupted, enter
the following command from the maintenance terminal:
MSS
This command displays the number of soft and hard errors
on the hard disk. If hard errors are reported your hard disk is
probably corrupted. Often you can remove hard disk
corruption by formatting the disk. If not, the hard disk is
faulty, and you must replace it.
Formatting the Hard Disk
Non-redundant Systems
If you have an RSD copy of the hard disk (a VOL
BACKUP)
1 Insert the RDS copy of the VOL BACKUP in the RSD
drive.
2. Enter:
VOL DISMOUNT SYSUSER
3. Enter:
VOL FORMAT DISK SYSUSER LOAD $8000 REDUN
$10000 SCRATCH.
4. Insert the RSD labelled “MAIN Backup <volume name,
dd/mm/yyyy>” in the RSD drive. This RSD contains a
copy of the hard disk. It was made during routine
maintenance.
5. Enter:
VOL RESTORE SYSUSER FROM RSD
6. Remove the RSD from the RSD drive.