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-   -   gutsy + mdadm + raid1 => hardy = 1TB of lost (corrupt?) data! (

LeeSimpson 05-21-2008 01:56 AM

gutsy + mdadm + raid1 => hardy = 1TB of lost (corrupt?) data!

I had Ubutnu Gutsy Gibbon installed with 3 SATA HDD's.

/dev/sda (500GB Drive)
/dev/sdb (1TB Drive)
/dev/sdc (1TB Drive)
/dev/md0 is a device created with mdadm using /dev/sdb and /dev/sdc

All devices were mounted and functioning perfectly.

I upgraded to hardy, and suddenly the md0 device isn't even listed in /dev/md0.

I tried to (re)assemble the array (mdadm /dev/md0 --assemble --level=1 --raid-devices=2 /dev/sd[bc] ), which then started re-syncing the drives. At this point I decided to halt the machine, woried that the 're-syncing' was wiping out the actual data.
Perhaps my assertion is wrong though. After about 10min it had only re-synced about 1% of the drive which sounds like its re-copying all the data from one drive to another.

I'm worried here that I have now corrupted both my 1TB HDD's. What is the recommended solution for determining if the data is still there?
Can I somehow attempt to mount the drives as a read only raid-1 volume? Or can I mount an individual drive seperate from the array?
One final option may even be to run a data recovery tool to extract the data (mainly avi files and the like). The drives were formatted with ext3.

What I'm looking for here is advice on how to proceed. I don't mind shuffling data off the drives. Onto a new HDD (even if it means I have to buy /another/ 1TB drive). I just don't want to loose all my data here.

Thanks in advance for any and all help.
Lee Simpson

XavierP 05-21-2008 05:47 AM

Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate.

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