LVM reports "Cannot use device with duplicates."

Solution Verified - Updated -

Issue

  • When attempting to extend a VG, the below error is produced:
# vgextend example_vg /dev/mapper/mpatha
  Error vgextend : Cannot use device /dev/mapper/mpatha with duplicates.
  WARNING: Not using lvmetad because duplicate PVs were found.
  WARNING: Use multipath or vgimportclone to resolve duplicate PVs?
  WARNING: After duplicates are resolved, run "pvscan --cache" to enable lvmetad.
  WARNING: PV xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx on /dev/sdx was already found on /dev/sdy.
  WARNING: PV xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx on /dev/sdy was already found on /dev/sdz.
  WARNING: PV xxxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx on /dev/sdz was already found on /dev/mapper/mpatha.
<...>
 Cannot use device /dev/mapper/mpatha with duplicates.
  • When attempting to create a new volume group, getting error Cannot use device /dev/mapper/mpatha with duplicates.

Environment

  • Red Hat Enterprise Linux 7

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In
Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.