Need Suggestions for Automated Backup

[Net Llama!]

Another option, that just came to mind (assuming that you have a
relatively fast network) since you mentioned that physical access will be
difficult, is to use rsync-over-ssh, to rsync the entire box to a
different physical box, and then back up the data on the 2nd box.  This
assumes that you would have physical access to the 2nd box.

On Wed, 3 Dec 2003, Chong Yu Meng wrote:
> Thanks Ian ! A bit more detail than I was looking for, but very welcome
> nonetheless !
>
> The reliability problem I had in mind was this : my experience with CDs
> is, out of 10 CD's burned, there's always one that's messed up (i.e.
> buffer underflow/overflow causing the CD to be useless).
>
> Anyway, I'm still checking out different methods. I've got a really
> thorny problem here because :
>
> 1. Money is a real issue. SGD$700 is too much to pay for a backup drive
> and tape
> 2. Access to the data center is highly restricted, since the terrorist
> arrests in Singapore, so it will be very inconvenient for me to do
> backups physically every day (which is what I may have to do, if I use
> CD's -- the data center people only do tape rotations).
>
> I'm thinking RAID mirroring is probably the way to go, and only do
> weekly backups.
>
> Regards,
> pascal chong
>
>
> Ian Stephen wrote:
>
> >On Mon, 2003-12-01 at 18:39, Chong Yu Meng wrote:
> >
> >
> >><snip> I was wondering how
> >>good CD-ROM backups are. I haven't heard of anyone using it, and I'm
> >>wondering if it is because they are unreliable. I'm thinking of the
> >>following scheme:
> >>
> >>1. Tar all files to be archived into a humongous file
> >>2. Mount CDROM drive (with blank CD inside)
> >>3. Copy humongous tar file to CD
> >>4. Unmount CD
> >>
> >>All operations are to take place possibly around 4am local time.
> >>
> >>
> >
> >I read somewhere recently that CDs may not give reliable backup for as
> >long as previously thought.  It was still in terms of years though.
> >Sorry this is so vague, I didn't pay any attention when I read it.
> >
> >I'm just a simple home/soho user, but after some questions to this list
> >I put together a bash script for backups.  Comments/flames welcome.
> >
> >Starts by deleting files left behind by the last run then goes;
> >
> ># have it check the size to be backed up
> >du -c `cat ./Backups/backuplist.txt` > ./Backups/backupsize.txt
> >
> ># get just the total size
> >tail -n1 ./Backups/backupsize.txt > ./Backups/backuptotal.txt
> >
> ># read that total size into variables for comparison
> >read <./Backups/backuptotal.txt fullsize extraword
> >
> ># compare fullsize of backup to my maximum and quit if too big
> >if test $fullsize -gt 800000
> >       then echo "Oh crap it's too big! " $fullsize "bytes!"
> >            exit
> >fi
> >
> ># With old files safely out of the way and size checked
> ># have find make a TOC for my backup based on
> ># what directories I've put in backuplist.txt
> >
> >find `cat ./Backups/backuplist.txt` >> ./Backups/found.txt;
> >
> ># cpio uses find's TOC to create an archive named backup.cpio
> ># in the Backups directory
> >
> >cpio -oavBH crc < ./Backups/found.txt > ./Backups/backup.cpio;
> >
> ># bzip2 compresses backup.cpio
> >
> >bzip2 ./Backups/backup.cpio
> >
> ># make an iso from the bz2 file
> >
> >mkisofs -r -o ./Backups/backup.iso ./Backups/backup.cpio.bz2
> >
> ># change permissions of the iso so cdrecord can burn it
> >
> >chmod 666 ./Backups/backup.iso
> >
> ># burn the compressed archive to CD
> >
> >cdrecord speed=4 dev=0,0,0 ./Backups/backup.iso
> >
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> >
> >
>
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman				netllama at linux-sxs.org
Linux Step-by-step & TyGeMo		     http://netllama.ipfox.com