[Dovecot] RAID1+md concat+XFS as mailstorage

Hello!

somewhere in maillist I've seen RAID1+md concat+XFS being promoted as mailstorage. Does anybody in here actually use this setup?

I've decided to give it a try, but ended up with not being able to recover any data off survived pairs from linear array when _the_first of raid1 pairs got down.

thanks!