[NCLUG] Need help with ether md raid or possibly ext4 corrupted group descriptors

[Kevin Fenzi]

On Fri, 30 Jan 2009 10:39:20 -0700 (MST)
"Mike Jensen" <jent at afkfoo.com> wrote:

...snipp...

> I used the command: mdadm --build /dev/md0 --level=0
> --raid-devices=3 /dev/sda2 /dev/sdb1 /dev/sdc1

That is very unlikely to be what you wanted to do. --build makes a new
array with no superblocks. :( 

BUILD MODE
       Usage:  mdadm  --build  md-device  --chunk=X  --level=Y
--raid-devices=Z devices

       This  usage  is similar to --create.  The difference is that it
       creates an array without a superblock. With  these  arrays
       there  is  no  difference between  initially  creating  the
       array  and  subsequently assembling the array, except that
       hopefully there is useful  data  there  in  the  second case.

Rescue mode should have started it I would think... not sure why it
wouldn't. Perhaps a drive dropped out? what does /proc/mdadm say?

...snipp...

kevin
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