lvconvert

Convert or modify the type, redundancy, or state of logical volumes. More information: https://manned.org/lvconvert.

• Convert a linear logical volume to RAID1 (add one mirror: two copies total):

lvconvert --type raid1 {{[-m|--mirrors]}} 1 {{/dev/vg_name/lv_name}}

• Remove mirroring and convert back to a linear logical volume:

lvconvert {{[-m|--mirrors]}} 0 {{/dev/vg_name/lv_name}}

• Merge a snapshot back into its origin logical volume (applies on next activation):

lvconvert --merge {{/dev/vg_name/snapshot_lv}}

• Repair a degraded RAID logical volume:

lvconvert --repair {{/dev/vg_name/lv_name}}

• Convert an existing logical volume into a thin pool with a separate metadata LV:

lvconvert --type thin-pool --poolmetadata {{/dev/vg_name/pool_metadata_lv}} {{/dev/vg_name/pool_lv}}