Re: Looking for backup software of complete system

From: Mike Noble (mgnoble_at_cox.net)
Date: 10/10/04

  • Next message: Mike Noble: "Re: how to run window .exe files in FC1!" 
    Date: Sat, 09 Oct 2004 17:06:01 -0700
To: For users of Fedora Core releases <fedora-list@redhat.com>

    Mike Noble wrote:
    > Randy Kelsoe wrote:
    >
    >> Mike Noble wrote:
    >>
    >>> I just used dump to move the OS from one partition to another
    >>> one and it worked just fine. Now I will say that this was
    >>> done with Mandrake Linux dump, but dump should be the same
    >>> for either Mandrake, Fedora, debian....).
    >>>
    >>> Mike
    >>
    >>
    >>
    >> Here is what Linus said about dump back in April of 2001:
    >>
    >> "...Note that dump simply won't work reliably at all even in 2.4.x: the
    >> buffer cache and the page cache (where all the actual data is) are not
    >> coherent. This is only going to get even worse in 2.5.x, when the
    >> directories are moved into the page cache as well.
    >>
    >> So anybody who depends on "dump" getting backups right is already playing
    >> russian rulette with their backups. It's not at all guaranteed to get the
    >> right results - you may end up having stale data in the buffer cache that
    >> ends up being "backed up"......
    >>
    >> Right now, the cpio/tar/xxx solutions are definitely the best ones, and
    >> will work on multiple filesystems (another limitation of "dump").
    >> Whatever
    >> problems they have, they are still better than the _guaranteed_(*) data
    >> corruptions of "dump".
    >>
    >> However, it may be that in the long run it would be advantageous to
    >> have a
    >> "filesystem maintenance interface" for doing things like backups and
    >> defragmentation.."
    >>
    >> Linus
    >>
    >> That was 3 and a half years ago, so things may have changed. I would
    >> hope so, since dump is still part of the distro.
    >>
    >>
    >>
    > I am glad that you mentioned this, I really do not know if
    > this has gotten better or not. I will have to look into this
    > further.
    >
    > Mike
    >

    I have checked with members of the SAGE mailing list and several
    have been using dump with Linux for the last couple of years.
    Yes they have tested for disaster recover and it has worked fine.
    One not is that dump will only work for ext2 and ext3 file systems.
    XFS has xfsdump and xfsrestore. Do not know what Reiser has.
    But as mentioned by someone on this thread already, do test your
    backups every now and then to make sure that you can recover.

    Mike 

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  • Next message: Mike Noble: "Re: how to run window .exe files in FC1!"

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