Add commands to storage

Author: Indigo5684

docs/sytem-administration/storage.md

@@ -13,6 +13,8 @@ kubectl -n rook-ceph scale deployment rook-ceph-operator --replicas=0
 
 kubectl -n rook-ceph-cluster scale deployment rook-ceph-osd-<ID> --replicas=0
 kubectl -n rook-ceph-cluster exec -it $(kubectl -n rook-ceph-cluster get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') -- ceph osd down osd.<ID>
+kubectl -n rook-ceph-cluster exec -it $(kubectl -n rook-ceph-cluster get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') -- ceph osd purge <ID> --yes-i-really-mean-it
+kubectl delete deployment -n rook-ceph-cluster rook-ceph-osd-<ID>
 
 kubectl -n rook-ceph scale deployment rook-ceph-operator --replicas=1