Date: Sat, 6 Jul 2002 11:45:58 -0700 From: Doug Hardie <bc979@lafn.org> To: "Rob" <listone@deathbeforedecaf.net> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: Backups to CD-R - problems with filesystems Message-ID: <f05111b1db94ce9ad8407@[10.0.1.90]> In-Reply-To: <000e01c22501$26e349e0$a4b826cb@goo> References: <000e01c22501$26e349e0$a4b826cb@goo>
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At 0053 +0930 7/7/02, Rob wrote: >I've had a few adventures in recent days trying to make CD-R backups. In >case I've gone down a complete dead-end, here's the objective: > >* Copy selected directory trees from 3 FreeBSD systems onto CD as a > mountable filesystem (not a monolithic archive) > >The first challenge was to get the files onto 1 machine (with a CD burner). >I tried piping tar through ssh > > goo# ssh gir 'cd / ; tar -cf - boot etc home usr/local/etc' | > ( cd gir && tar -xpf - ) > >but discovered that it misbehaves when the users in a tarfile don't exist >on the destination machine. Instead of leaving the files with numeric >owners, it chowns them to the user performing the extraction. Having encountered the same problems, here is what I ended up doing. Tar has the original V7 format available. There is an option to create in that format. It does not use user names, but uses the numeric uids and groups. This will keep them constant for you. However, it does not backup directories or their permissions. Only the files are written to the tar file. When the extraction is done, it will create any needed directories with the right names and contents. However the owner of the directories created will be that of the user running tar. What I am doing is creating the tar file on the remote machine using rmt (e.g., tar -cv machine:directory/name ...). That creates the tar file on the remote server. I archive tar files rather than the originals. I find it easier to restore from tar. The command I use to create the ISO image is: mkisofs -R -J -V $DATE -o /backups/ISO/production.iso /backups/*.tar I then ftp the iso image over to a Mac and burn a DVD. The DVD then mounts fine on FreeBSD and the tar files are directly accessible. My backups use about 95% of the DVD. I have done some small backups to CD and that also worked fine. -- -- Doug To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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