Use a separate at server_name clause for each stripe device attached to a remote Backup Server.
If you do not specify a remote Backup Server name, the local Backup Server looks for the dump device on the local machine. If necessary, you can also specify separate tape device characteristics (density, blocksize, capacity, dumpvolume, and file) for individual stripe devices.
dump database pubs2 to "/dev/nrmt0" at REMOTE_BKP_SERVER stripe on "/dev/nrmt1" at REMOTE_BKP_SERVER stripe on "/dev/nrmt2" at REMOTE_BKP_SERVER