Verifying that RHEL 6 DDMP devices are ready for transition using CLI
Before you transition your Red Hat Enterprise Linux (RHEL) 6 DMMP device, you must verify that it is not part of a Logical Volume Manager (LVM) and that it does not have a file system.
Gather pretransition information from the Inventory Assessment Workbook.
Verify that the DMMP device exists in the
ls /dev/mapper/ DMMP_device_name
If the DMMP device is not displayed, the device might be using an alias or a user-friendly name.
Determine whether the DMMP device is part of an LVM and whether the DMMP device has a file system:
If the DMMP device is not part of an LVM and has no file system the device entry should not be displayed in blkidoutput.