[NCLUG] file system damage from dd with of=<a drive in my file system>

[Vincent Randal]

Thanks Ray, you given me a good idea where to look for the problem.

sudo vgdisplay -v | tail -n 11
    Using volume group(s) on command line. # what?
  --- Physical volumes ---
  PV Name               /dev/sda2
  PV UUID               9KDSFf-xdes-deo2-18nd-Z3GW-VLlq-JMbmiL
  PV Status             allocatable
  Total PE / Free PE    59257 / 0

  PV Name               /dev/sdb1
  PV UUID               Ceh1Cc-aGH7-voMx-rbpR-fXAj-MvOr-sWEqwn
  PV Status             allocatable
  Total PE / Free PE    121990 / 0

sudo vgck
  Couldn't find device with uuid Ceh1Cc-aGH7-voMx-rbpR-fXAj-MvOr-sWEqwn.
  The volume group is missing 1 physical volumes.

sudo pvck /dev/sdb1
  Could not find LVM label on /dev/sdb1

Maybe I can fix the problem from steps described here?
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Logical_Volume_Manager_Administration/mdatarecover.html