For "purge" you should probably clear any active translator before removing the node. Use `settrans -gaf NODE'. The -f tells the translator to go away even if there are users, i.e. processes that have the node open. (Without -f, settrans will fail with "Device busy" (EBUSY). With -f, users will lose their ports to the node and if they try to use it they will get errors and/or SIGLOST.)