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Second stage failure analysis examines the existing LVM volume groups, and reports where manual intervention is required to correct a problem because the existing volume groups do not meet the conversion criteria.
See "Volume group conversion limitations" on page 528.
The following sample output is from an analysis that has failed because of the presence of a snapshot in the volume group:
Snapshot conversion is not supported in this version. Please
remove this volume and restart the conversion process
The solution is to remove the snapshot volume from the volume group.
The following sample output is from an analysis that has failed because the dm_mirror module (required by the LVM2 pvmove utility) is not loaded in the kernel:
Conversion requires some extent movement which cannot be done without the dm_mirror target in the kernel. Please consider installing the dm_mirror target in kernel and retry the conversion.
The solution is to ensure that the dm_mirror module is loaded in the kernel.
The following sample output is from an analysis that has failed because the LVM2 pvmove utility cannot be used to move extents on an LVM1 volume group:
Conversion requires some extent movement which cannot
be done on a LVM1 volume group. Please consider converting
the volume group to LVM2 and retry the conversion analysis again.
The solution is to use the LVM2 vgconvert command to convert the LVM1 volume group to an LVM2 volume group, before retrying the conversion.