Re: Backups work! (when you've got 'em)

From: Shane Spencer <shane@bogomip.com>
Date: Wed Jan 31 2007 - 12:11:35 AKST

No comment.

On 1/31/07, Damien Hull <dhull@digitaloverload.net> wrote:
> Leif Sawyer wrote:
> > Damien Hull wrote:
> >
> >> I write this because I know most people don't backup their
> >> data. Here's proof that they not only work but can save you
> >> time and effort.
> >>
> > I'd extend this out to remind folks that LVM and RAID don't count
> > as backups.
> >
> > I just learned the hard way that when an LVM gets corrupted, things go
> > downhill really fast.
> >
> > Short story:
> > RAID-1 mirror of disk partition
> > LVM container inside RAID-1
> > root and user partitions inside LVM container
> >
> > LVM goes crackers
> > root partition fully corrupted
> > usr partition status unknown
> >
> > Which actually brings me to the fun part:
> >
> > I _just_ hax0red a -really- dirty little application to scan the disk/image
> > for an EXT2/EXT3 header, and after some sanity checks, print the results.
> > Pretty useful for forensics, but in serious need of performance
> > enhancements.
> >
> > Anybody interested in this? Or want to play with trying to boost the
> > performance?
> > ~500MB/hour is pretty slow, especially in relation to a 78GB drive... ugh.
> >
> > oh, and as a followup to the story... no, it's not done searching the drive
> > for my /usr partition.
> > If I could remember how big the 'root' was, I could estimate where to start
> > the searching...
> > it was somewhere between 9G and 20G, so... yeah...
> >
> >
> > Towards the future? Add a third drive to the mirror, for rsync backups.
> > That way human error
> > is also reversable. :-)
> >
> >
> > -- Binary/unsupported file stripped by Ecartis --
> > -- Type: application/x-pkcs7-signature
> > -- File: smime.p7s
> >
> >
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> >
> >
> My server is using software RAID 1 and LVM. It works well. RAID is nice
> but it doesn't save you if you delete data. Once you do that it's gone.
>
> Is it better to have RAID 1 or 5 ( no 0 ), backup of your data to DVD
> etc..., or both? I would like to get peoples thoughts on this.
>
>
>
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Received on Wed Jan 31 12:11:53 2007

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