Check the logical volume to be mirrored

root@aix:/ # lsvg -l datavg | grep mirroring
mirroring jfs2 64 64 7 open/syncd /data

Run the command below to make two copies of this logical volume

root@aix:/ # mklvcopy mirroring 2

Then start syncing the volume group

root@aix:/ # nohup syncvg -v datavg &

To verify that the volume is mirrored, verify if the column PPs is the double of the column LPs

root@aix:/ # lsvg -l datavg | grep mirroring
mirroring jfs2 64 128 14 open/stale /data

• AIX