--- On Wed, 12/10/08, James Harper <james.harper AT bendigoit.com DOT au> wrote:

> From: James Harper <james.harper AT bendigoit.com DOT au>
> Subject: [Bacula-users] pre-checking tape for next backup
> To: bacula-users AT lists.sourceforge DOT net
> Date: Wednesday, December 10, 2008, 8:19 PM
> I asked this question a while back, but I'd like to now
> figure out a
> solution to it.
> 
> Basically, one of our clients used to run Amanda and now
> runs Bacula.
> Obviously Bacula is superior :) but one feature they miss
> from Amanda is
> the ability to be notified if the tape (external disk in
> this case) has
> not been changed.
> 
> At 11am, Amanda would check and send an email to the backup
> operator if
> the current tape was not suitable for tonights backup. At
> 3pm it checks
> again and if the current tape is still not suitable, it
> emails the
> operator and a few others, on the assumption that the
> operator is out of
> the office.
> 
> At some sites where we use tapes, the tape is ejected at
> the end of the
> backup so it's easy to just check if there is a tape
> inserted or not (it
> is reasonable to assume that if a tape has been put in that
> it's
> probably the right one) but for usb attached external disks
> it's not so
> simple, so I would like a more general solution...
> 
> My rules would be:
> 1. Check mounted volume - if no volume then send email
> 2. If status is 'Recycle' (or other immediately
> usable state) then no
> action
> 3. If status is 'Append' then send email (only room
> for one backup on a
> tape, maybe this would be configurable)
> 4. If status is 'Used' and it will still be
> 'protected from overwrite'
> at the time of the next scheduled backup then send email
> 5. If status is 'used' and the tape will be
> eligible for recycle at the
> time of the next backup then no action
> 6. Otherwise, the situation is something I haven't
> thought of so send an
> email to me so I can put a rule in for it.
> 
> #1 should just be a mount operation, but then how can I get
> the name of
> the volume that is currently mounted?
> 
> #2-6 should just be a bit of creative Sql and some
> scripting (Python?)
> 
> Any comments or suggestions?
> 
> James
> 
> 
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Here is a psuedo code of what I have done in a shell script:


  mt -f /dev/tapedevice status | grep ONLINE
  if [ $? != 0 ]
  then
      send e-mail that tape drive is empty.
  else
      # Read label from tape
      Label=$(echo readlabel | btape -c bacula-sd.conf /dev/tapedevice | grep 
VolName | cut -d':' -f 2)

     # Remove leading and trailing spaces
     Label=$(echo $Label)
     if [ -z $Label ]
     then
         # Unlabeled tape, take appropriate action.
     else
        # query the database for the volume name and
        # send appropriate e-mails.
     fi
  fi

Hemant Shah
E-mail: hjrrs AT yahoo DOT com



      

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