Explanation
Logical volumes from scalable volume groups (subtype DS_LVZ) do not contain an
LVCB. That is, the very first block contains user data.
AIX LVM volumes from original volume groups (subtype LVM) contain a Logical
Volume Control Block (LVCB) on the first block (512 bytes) of the volume. When
restoring to a volume of subtype LVM, the first block must be skipped in order
to preserve the existing LVCB of the destination volume. That is, the restore
operation begins writing at the second block of the volume.
This means that given two volumes of identical size, one of subtype DS_LVZ and
the other is of subtype LVM, the latter has one less 512-byte block in which to
store user data. Thus when you restore a volume of subtype DS_LVZ to a volume
of subtype LVM, it is not sufficient for the destination volume to be the same
size as the source volume. Instead, the destination volume must be at least one
512-block larger than the source volume.
System action
The restore operation is not performed.
User response
Make sure that both source and destination logical volumes are of the same type, or choose a larger destination volume, or increase the size of the destination volume.