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