pvesm-add: add page (#23345)

pages/linux/pvesm-add.md

@@ -0,0 +1,16 @@
+# pvesm add
+
+> Add storages.
+> More information: <https://pve.proxmox.com/pve-docs/pvesm.1.html#cli_pvesm_add>.
+
+- Add a directory storage:
+
+`pvesm {{[ad|add]}} dir {{storage_name}} --path {{path/to/directory}}`
+
+- Add an LVM storage:
+
+`pvesm {{[ad|add]}} lvm {{storage_name}} --vgname {{volume_group_name}}`
+
+- Add an LVM-Thin storage:
+
+`pvesm {{[ad|add]}} lvmthin {{storage_name}} --vgname {{volume_group_name}} --thinpool {{logical_volume_name}}`