[CentOS] Filesystem backup?

Rafał Radecki radecki.rafal at gmail.com
Sun Jun 21 13:06:35 UTC 2009


I think about using dd instead of dump? Is this an acceptable idea?

2009/6/21 Robert Heller <heller at deepsoft.com>

> At Sun, 21 Jun 2009 11:49:09 +0200 CentOS mailing list <centos at centos.org>
> wrote:
>
> >
> >
> >
> > Hi all. I'm currently having a following problem: I have only ssh
> connection
> > to a CentOS 5.2 system, there are two harddiscs on it. One stores the
> system
> > (/ filesystem) and the other should be used to help restore the system in
> > case of first disks' failure. I thought that maybe dump would be a good
> > utility to make it. But in only works on read-only filesystems. In one
>
> Dump works just fine on a read-write file system.  There is the pretty
> much standard limitation (that applies to *all* backup methods) that
> when backing up an 'active' file system: there will always be files that
> will miss the backup because they were being written during the backup
> process.
>
> > article I've read that making a snapshot of the / filesystem (then it
> > wouldbe read-only) and backing it could help. But aren't snapshots
> limited
> > to logical volumes (LVM)?  My friend told me to use rsync to back up the
> > entire / filesystem to the second disk and then in case o failure the
> system
> > from the copy should boot ok.
> >
> > Could anyone provide any suggestions? I don't have physical contact with
> the
> > machine so for example RAID 1 isn't a possible option/
> >
> > Any help will be very kindly appreciated.
>
> Make an initial dump to get the base system copied, then set up a cron
> job to sync the disks once a day (or more frequently) with rsync.
>
> >
> > With regards,
> > R.
> >
> > MIME-Version: 1.0
> >
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> >
> >
>
> --
> Robert Heller             -- 978-544-6933
> Deepwoods Software        -- Download the Model Railroad System
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> heller at deepsoft.com       -- http://www.deepsoft.com/ModelRailroadSystem/
>
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