System Backup help.

[DavidB]

whizkid at ValueDJ.com wrote:
> I have been running BSD for a week or so now.  I have everything setup
> just right, Webmail, DNS, IMAP, Webserver, etc....
> 
> I just install a DDS-2 tape drive, I have been reading about using dump
> for backing up filesystems.  How can I use dump to backup the entire
> drive?  If I try using:
> 
> dump 0 -A ad0
> 
> it fails.. do I have to run dump on each slice?  I plan on setting up a
> chron job that runs every night to do a incremental backup, then a full
> backup at the end of the week.
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Have you read the manpage?

dump works by filesystem.
If you not sure what that is then use df it will show you a listing of 
Filesystems and their disk consumption. Or look at your /etc/fstab

this an example of what I use:

/sbin/dump -0au -f /dev/nsa0 /usr

/dev/nsa0 will need to be whatever your device is and if you are going 
to dump more than one thing to the tape in sequence then use the device 
node that is non-rewinding i.e. /dev/sa0 is scsi tape device /dev/nsa0 
is non-rewinding.

you also need to use mt  if you write more than one thing to the tape to 
  position the tape head to where you want to be.  I suggest man mt for 
more info about that