lvconvert: add page (#17934)

pages/linux/lvconvert.md

@@ -0,0 +1,24 @@
+# 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}}`