[CentOS] Filesystem backup?
rudiahlers at gmail.com
Sun Jun 21 10:15:18 UTC 2009
2009/6/21 Rafał Radecki <radecki.rafal at gmail.com>
> 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
> 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.
> With regards,
rsync will probably be your best bet. You'll be able to make an exact copy
of the / root system, regardless of what filesystem it uses.
Furthermore, you can choose to exclude certain stuff from being copied over
to the backup HDD, and all the files will be accesabile like they are on the
first HDD. The advantage of this, is that the HDD could be put into another
machine, without having to figure out how to restore it. And, you could run
a cronob to sync the files every night.
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