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

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. :-)

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Received on Wed Jan 31 11:25:43 2007