Error in Back up Script !!

Posted on 2004-09-10
Medium Priority
Last Modified: 2013-12-15

I have a script which does daily back up.


DEVICE="sda1 sda3 sdb1 sdb2 sda5"
if ( ! mt -f /dev/st0 rewind)  then
      echo "No tape in drive" && exit 1

for item in $DEVICE; do
      mount /dev/$item -o remount,ro
      dump -0auqb 64 -f /dev/st0 /dev/$item
      mount /dev/$item -o remount,rw


It failed and gave me the following error for one of the file system.

Error message

DUMP: cannot rewrite /etc/dumpdates: Read only file system
DUMP: Entire dump is aborted.
mount: /var is busy.

Can somebody please tell me what cause this error and how should i rectify it. Shall i again run the back and see whether i am getting the error or what. Any help would be highly appreciated.

Thanks in the anticipation that I will get some useful hint to solve the above problem.

Question by:DipehKhakhkhar
  • 2
LVL 40

Accepted Solution

jlevie earned 150 total points
ID: 12031607
You script is invoking dump with the "u" option, whcih says to update the file /etc/dumpdates,. But you've re-mounted / as readonly so that update will fail.

You can either not mount / as readonly or remove the "u" option from the dump command.

Author Comment

ID: 12045647

Thanks a lot for replying and explaining me about the possible cause of error.
I have made the changes like, removed -u option from the back up script so that it won't write anything now and kept the mouting of the file systems in the read mode only.

I hope tonight it will run properly.

Thanks !


Author Comment

ID: 12078392
Hi ,

Thanks for your help. It worked and backing is working fine now.


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