Hi,
I am using amanda to back up to a hard disk on my system and would
like to protect the backed up disk from accidental erasure.  I thought
one way to do this would be to mount it then run amdump, and then umount it.
The disk is going to be vulnerable during the backup period, but "safe"
when not doing a backup or recover.  

Is there a way to do this?  Or are there some permission settings that
would prevent a rm -rf /* as root from erasing all of the backup disk?

Thanks,
Scott