[CentOS] Filesystem backup?
nikolov.javor at gmail.com
Sun Jun 21 16:58:41 UTC 2009
Without snapshots there is some risk to get inconsistent set of files when
you make a backup of live file system. In general this is a problem but I'm
not sure about your case. Actually there is another solution to this problem
shutdown the system and take the backup using bootable CD/DVD (or booting
from another OS installation).
You should unmount a file system before backing up with dd. You can also
take a look at Clonezilla which is an open-source image-backup software.
2009/6/21 Rafał Radecki <radecki.rafal at gmail.com>
> 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>
>> > Hi all. I'm currently having a following problem: I have only ssh
>> > to a CentOS 5.2 system, there are two harddiscs on it. One stores the
>> > (/ filesystem) and the other should be used to help restore the system
>> > 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
>> > 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
>> > 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
>> > from the copy should boot ok.
>> > Could anyone provide any suggestions? I don't have physical contact with
>> > 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
>> > _______________________________________________
>> > CentOS mailing list
>> > CentOS at centos.org
>> > http://lists.centos.org/mailman/listinfo/centos
>> Robert Heller -- 978-544-6933
>> Deepwoods Software -- Download the Model Railroad System
>> http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows
>> heller at deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/
>> CentOS mailing list
>> CentOS at centos.org
> CentOS mailing list
> CentOS at centos.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the CentOS