rmtab contains a table of filesystems that are remotely mounted by NFS clients. This file is maintained by mountd(1M), the mount daemon. The data in this file should be obtained only from mountd(1M) using the MOUNTPROC_DUMP remote procedure call.
Lines beginning with a hash (' #') are commented out. These lines are removed from the file by mountd(1M) when it first starts up. Stale entries may accumulate for clients that crash without sending an unmount request.