Repairing large partition

[Eric Sandeen]

maillists0 at gmail.com wrote:
> Pardon if this is the wrong list for this question.
> 
> I had a 50T xfs partition, spread across 3 storage devices which were
> lvm'd. After a power failure, 2 disks on one device failed. It was
> raid5, so that data is unrecoverable.
> 
> I replaced the failed disks and rebuilt that array. I can mount the
> partition and see data on the first 2 devices. 'I ran xfs_repair -n' to
> see what might be done a couple of days ago and it still hasn't
> finished.  Does anyone know how I could recreate the partition to
> include the third device without losing data from the first two devices?
> Any help will be greatly appreciated, including a pointer to the
> appropriate docs. Thanks.

so was it a concat of 3 raid5s?

-Eric