man, this is quite simple, you need licences:
- 6 storage nodes
- 6 DDS
write down the devices for each server, example in unix/windows:
server1(NW) server2 server3
tape1: \\.\tape0 /dev/rmt/0mnb \\.\tape0
tape2: \\.\tape1 /dev/rmt/2mnb \\.\tape1
so run jbconfig *only* in the NW server and in the question "more than one path to the devices" answer yes... then when you specify the devices it will ask for the device:
path1: \\.\tape0
path2: server2:/dev/rmt/0mnb
path3: server3:\\.\tape0
path4: <hit enter with no entries>
second tape:
path1: \\.\tape1
path2: server2:/dev/rmt/2mnb
path3: server3:\\.\tape1
path4: <hit enter with no entries>
if your licences are "DEDICATED storage node" answer yes to the question "are you using dedicated storage node".
Then, on each client resource, specify the "storage node" attribute with the server name in the first line and then "nsrserverhost". with this attribute, you are telling to the client "backup using your tapes first, if it can not be done, use the NW server". Other clients with no tapes (through LAN backup) can use a storage node to backup, seting free the NW server of the backup job.
Hope this helps. This is well documented anyway.