Hello,

I have found a solution to the problem, however the problem seems to come back after every reboot.

I have been put on the good path by the remarks made on this list by John and Gionatan.

The fix is the following:

- convince myself that the device has the correct uuid, I used blkid and compared the result with the information in the lvm backup

- run pvck -t on /dev/sdc. Nothing special, all seems OK

- run vgscan --cache. This command brings back knowledge of the VG the PV belongs to

- now pvs lists my PV again, but the LV is inactive

- I activate the LV with lvchange

- all is back, I can mount and use the LV

After a reboot however the information about the VG is gone again, and I have to repeat the steps above to be able to use the LV.