I ran into something similar the other day. In my case, this helped:
1- Boot into live CD.
2- make sure your local disk(s) is/are visible. (blkid, fidisk, lsblk)
3- activate your raid (dmraid -a)
3- scan you physical volumes (pvscan)
4- activate your vg (vgchange -a y <vg>)
5- mount/fsck your...