On Sat, 29 Jan 2005 22:30, Xian wrote: > On Saturday 29 January 2005 01:51, Carleton Vaughn wrote: > > Ian Moore wrote: > > > Anyway, to backup /usr directly to a dvd(+rw), I use the this command: > > > dump -0 -uL -C16 -B4589840 -P 'growisofs -speed=4 -Z /dev/dvd=/dev/fd/0 > > > ' /usr This gives you a dvd or series of dvds with the dump file on > > > them. You can then boot from CD2 (live system) and use restore to > > > restore the data. If the link above is the one I think it is, it gives > > > you an example restore command. > > > > I'm in the same boat as Xian. I want to backup to DVD so I can upgrade > > to 5.3. dump in 4.10 does not have a -P option, and growisofs says > > nothing about handling spanning, so how do I span my dump over multiple > > DVDs? > > > > dump -h0 -B 4589840 -S /usr says I'm going to need 6.18 "tapes". I'm > > going to crack open a beer and just pipe it, to see what happens. > > > > Then some day if all goes well I will split /usr into /usr and /usr/home, > > 'cause this is ridiculous. > > > > Thanks. > > I have another machine running 4.9 (also without the -P option for dump) > and the way I get round it is to create the dump on another disk in pieces > then transfer them to another machine for burning. > > dump <usual args> -B<size of dvd> -f /home/usr.dump /usr > > /usr and /home are on different disks. Then when dump asks me if the next > volume is ready I move /home/usr.dump to /home/usr/dump.1, then tell dump > yes. And so on until dump has finished > > However I am having some issues with this. I transfer them to another > machine, (checking the md5 of them is the same before and after transfer > them), and test it with restore > > restore -Nxvb 2 -f usr.dump.1 > > and the first volume works fine, it says 'End-of-tape encountered'. I start > the next volume and it tells me > > unexpected tape header > abort? [yn] > > What could be doing this and how do I fix it?
That was how I was considering doing backups in DVD sized chunks until I found out the -P option in 5.3. I've just tried doing it in 5.3 & works. Here's what I actually did: %sudo dump -1 -B 50000 -f /mnt/backups/var.dump /var When prompted for tape 2, in a second xterm I did: %sudo mv var.dump var.dump.1 Then back in xterm1, I said yes to the continue prompt. The dump completed. To restore I did: %restore -Nxvf /mnt/backups/var.dump.1 When asked which tape to use, I said 1 When prompted for tape 2, in xterm2 I did: %sudo mv var.dump.1 var.dump.a %sudo mv var.dump var.dump.1 Then back in xterm1: End-of-tape encountered You have read volumes: 1 Specify next volume #: 2 Mount tape volume 2 Enter ``none'' if there are no more tapes otherwise enter tape name (default: /mnt/backups/var.dump.1) none extract file ./db/entropy/saved-entropy.6 <snip> extract file ./tmp/kdecache-root/ksycoca Add links Set directory mode, owner, and times. set owner/mode for '.'? [yn] n So it works in 5.3, maybe there is a bug in the old dump or restore program? NB, I didn't need to use -b 2 in the restore command. Perhaps you should try it without that switch. Cheers, -- Ian GPG Key: http://homepages.picknowl.com.au/imoore/imoore.asc
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