Oracle Linux: Using LVM with multipath disks reports 'Found Duplicate PV' message (Doc ID 1150183.1)

Last updated on JULY 28, 2017

Applies to:

Linux OS - Version Oracle Linux 5.0 and later
Linux x86
Linux x86-64

Symptoms

Messages such as the following are reported when running commands such as partprobe(8) on an Oracle Linux (OL) system using LVM (Logical Volume Manager) and multipathing e.g. device-mapper-multipath or EMC PowerPath, etc.:

Error: Error informing the kernel about modifications to partition /dev/sda1 -- Device or resource busy. This means Linux won't know about any changes you made to /dev/sda1 until you reboot -- so you shouldn't mount it or use it in any way before rebooting.
...

Messages such the following are reported when running the pvs(8) command to obtain Physical Volume (PV) related information:

Found duplicate PV G9tZklKg1nrXN7wGADvwHQOQtgd4w58M: using /dev/sdb1 not /dev/sda1
Found duplicate PV G9tZklKg1nrXN7wGADvwHQOQtgd4w58M: using /dev/sda1 not /dev/emcpowera1
...

Changes

LVM is configured to utilise multipath managed disk devices.

Cause

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