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4.4.3.2. Splitting Off a Redundant Image of a Mirrored Logical Volume

You can split off a redundant image of a mirrored logical volume to form a new logical volume. To split off an image, you use the --splitmirrors argument of the lvconvert command, specifying the number of of redundant images to split off. You must use the --name argument of the command to specify a name for the newly-split-off logical volume.
The following command splits off a new logical volume named copy from the mirrored logical volume vg/lv. The new logical volume contains two mirror legs. In this example, LVM selects which devices to split off.
lvconvert --splitmirrors 2 --name copy vg/lv
You can specify which devices to split off. The following command splits off a new logical volume named copy from the mirrored logical volume vg/lv. The new logical volume contains two mirror legs consisting of devices /dev/sdc1 and /dev/sde1.
lvconvert --splitmirrors 2 --name copy vg/lv /dev/sd[ce]1

 
 
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