How do I restore a volume group in Red Hat Enterprise Linux if one of the physical volumes that constitute the volume group has failed?

Solution Unverified - Updated -

Issue

  • How to restore a volume group and its logical volumes after a disk (physical volume) that the logical volume was using has failed or the volume has become corrupted or was overwritten ?
  • We have a strange behaviour on a RHEL 6.5 server. The SAN based filesystems (/dev/mapper/VolGroupXX*) are mounted, and they are readable and writable. But when I execute pvs ,vgs ,lvs ,pvscan ,vgscan and lvscan. I don't see any PVs, VGs or LVs related to VolGroupXX*. Only with multipath -ll and dmsetup ls --tree commands I see references to the VolGroupXX*.
  • unknown device error in pvs output but disks are showing in multipath

Environment

  • Red Hat Enterprise Linux (RHEL) 4
  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
  • LVM2

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