Error: Mirror pools must be defined

The following error message occurred while creating a mirrored logical volume:

# mklv -c 2 -t jfs2 datavg01 10
0516-1814 lcreatelv: Mirror pools must be defined for each copy when strict mirror
        pools are enabled.
0516-822 mklv: Unable to create logical volume.

The reason for this is that the mirror pool strictness is set for the volume group. The article Mirror Pools: Understanding Mirror Pool Strictness examines and explains this in more detail.

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