On 07/01/2010 05:12 PM, Helmut Jarausch wrote: > Hi, > > would anybody please explain to me what difficulties > might occur if I mirror a live root file system > and use that for booting (in an emergency case). > > I know that for proper mirroring I may mirror a live > root file system but I have to rsync it after booting from a > different device (USB,...) > > But what happens if I have to boot a system from a backup > which has been mirrored from a live root file system. > > Many thanks for sharing your experience, > Helmut.
This will probably be no problem at all: it's (nearly) the same thing as pushing the reset knob and booting :) I suggest you use a LVM-snapshot. If you use "cp" or "rsync", then use the "-x" switch (and "-S" with rsync). Those methods have worked for me for bare-metal-recovery until now. The only thing that mostly breaks are databases. So create a dump before copying, and copy it too. Or if possible stop the DB and make a copy of the files, then start it again. Or both ;) Bye, Daniel Just in case: When booting from CD always use "--numeric-owner" with tar and "--numeric-ids" with rsync or uids and gids will get messed up. -- PGP key @ http://pgpkeys.pca.dfn.de/pks/lookup?search=0xBB9D4887&op=get # gpg --recv-keys --keyserver hkp://subkeys.pgp.net 0xBB9D4887
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