Re: backing up - RAID or tape drive?

[Julius Smith]

I prefer a manual replacement for RAID using rsync (to maintain the ability to recover from unintended deletions). I also prefer CD-ROMs to tapes, but of course that only works for relatively small backup sets. (DVD-ROMs will be more interesting).

I use rsync to mirror locally as follows:

rsync -au /etc /home /root /usr/local /bkp/

where /bkp is a separate backup drive. This is in the file /etc/cron.daily/daily-mirror and runs every night at 4am.

I also rsync to a remote server (via DSL in the slow direction) as follows:

rsync -e /usr/bin/ssh -avvuz /home/me/ mirror:~/ | perl -e "while (<>) { print unless m/uptodate/ }"

where 'mirror' is listed in my /etc/hosts file. (Say 'man rsync' to investigate my rather conservative and verbose options.) I do not use '--delete' in these frequent backups as a safety measure. Once in a while I do a manual '--delete' to clean things up.

Finally, I burn project-specific CD-ROMs once in a while, particularly when leaving a project for a while. I usually make two of each so one copy can be stored in a different building.

Julius



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