F10+dmraid eats puppies! (and ate my system too)
Graham TerMarsch
fedora at howlingfrog.com
Sun Dec 14 06:50:32 UTC 2008
On December 13, 2008, Robert L Cochran wrote:
> Could you have used one or more of: dd, ddrescue, and Testdisk to copy
> your system to a set of spare drives and then work only on the spares
> until you had a clear idea of what was wrong? I think that would have
> gone a long way to sparing you from some data loss.
Agreed, there are a multitude of different ways that I could have approached
this that might have prevented loss of data. Fortunately, once I figured out
what had happened I was able to mount both sda and sdb individually and get
the files off that I needed. As for copying my system to a set of spare
drives, its not like I (or likely too many other people here) just have a set
of spare drives kicking around with a few hundred GB of empty space on them,
"just in case" of emergency. Sounds great, but in practice
What I want to emphasize from my initial post, though, was that its entirely
possible for someone to get into this funky state and to have data loss and/or
mirror failure without actually doing anything unusual.
The F10 installed told me that it was installing onto the nvidia dmraid setup
that I had, and thus I expected that as a result that when it was done that
I'd actually be running on that dmraid setup (or that it'd at least throw some
sort of message to indicate that it *wasn't*). Instead, though, I ended up
running on bare sda.
IMO, anyone who had a dmraid setup and that has since upgraded to F10 could
now very likely be just as hosed as I was. Even if they don't get the
behaviour of swapping from sda to sdb, they're still running *without* the
dmraid that they were led to believe that they installed in/on.
--
Graham TerMarsch
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