HELP! Installed 10.04, now RAID drive corrupted!

[Tom H]

On Fri, Apr 9, 2010 at 5:45 PM, J <dreadpiratejeff at gmail.com> wrote:
> On Fri, Apr 9, 2010 at 17:33, Alvin Thompson <alvin at thompsonlogic.com> wrote:
>> I tried installing 10.04 server on a system and now my RAID5 data device is corrupted.  I did not tell the installer to do
>> anything to my RAID device when I was installing, but I did tell the installer to create other RAID5 devices from other
>> partitions on the same drives.  I have a lot of very important data on that device so any suggestions would be
>> appreciated.  Can anyone please help, or does anyone have any idea on how to fix?
>
> What kind of raid card? just out of curiosity... Because I'm guessing
> you were using software RAID and not real RAID...
> At least, that's kinda what it looks like...
> you MAY be able to rebuild a new md1 with those four sd$x2 partitions,
> perhaps... though, honestly, I couldn't begin to tell you how. I stay
> away from software raid (assuming that's what you're using)...

Software raid is real raid! You are confusing software raid with
fakeraid, which is a cheap version of hardware raid where the bios
sets up the raid but control is passed on to the initrd and the kernel
after bootup.