The following procedure describes how to create a full system backup, using MondoRescue, to ISO images, that can later be burnt to DVD, and used to recover the entire system.
First, set up the REPO for MondoResuce:
Install MondoRescue:# cd /etc/yum.repos.d/ # wget ftp://ftp.mondorescue.org/rhel/7/x86_64/mondorescue.repo
Answer "y" to everything.# yum install mondo
You will need a destination to put the ISO files in. For example a remote NFS mount on a separate server is a good choice, so the backup is not locally on the same system.
Edit /etc/mindi/mindi.conf, to allow for a larger RAM disk. Mindi is used by Mondo. Wihout it, Mindi will exit saying it ran out of space. Add to mindi.conf:
Now run the MondoRescue backup:EXTRA_SPACE=240000 BOOT_SIZE=240000
You can also add the -E option to tell MondoRescue to exclude certain folders.# mondoarchive -O -V -i -s 4480m -d /target -I / -T /tmp
The -s option tells MondoResuce to make ISO images of DVD size 4480m.
The command says it will log to /var/log/mondoarchive.log. A /var/log/mindi.log is also written. It will also indicate the number of media images to be created. Let it run, and your backup is successful.