Date: June 27, 2003
I've been involved in a couple of situations this month
where customers could not restore a mksysb or a
backup tape. To insure you don't get into this situation,
I recommend checking your backups by periodically
restoring them on a different machine.
Here are a few other guidelines.
- Backup before and after major changes
- Periodically test the backup by restoring on a different machine.
- Cycle backup tapes. Keep several backups tapes in case a tape goes bad.
- Clean the tape head monthly
- Replace tapes after they have exceeded the manufacturer's recommended duty cycle (usually 50-100 backups)
- Check the integrity of filesystems using fsck. You probably won't be able to restore a backup of a damaged filesystem.
- Choose the right backup command. For example, tar can't backup files larger than 2GB.
Data Recovery Services
When all else fails, here are a sources for data recovery from 4/8mm tapes.
Note IBM can not endorse or recommend outside sources.