Originally Posted by descendant_command
So if an LV spans several disks and one fails, you loose the lot?
Or is it possible to (fairly easily) rebuild / salvage what is on the unfailed disks?
You can (attempt to) mount a lv "partial" - LVM will drop the missing device(s). Truncating a filesystem makes an awful mess - fsck will fix the f/s; your files are your responsibility. It is possible you can get files back - but the fsck will "fix" any files where necessary. Check "lost+found" for fragments.
The only sensible alternative is to add new volume(s) and restore.