I'm testing NCS Cluster volumes backups using Time Navigator.
Not sure if anyone else is using this solution.
You simply install the client then on your backup server you can create your client system adding a "Novell SMS Application"
You have to install as many clients as you have NSS volumes.

I used to bacjkup with SyncSort But was unhappy with Support Services.
My problem is that when I backup the root file system without smdr, things are working fine.
When I backup NSS volumes the throughput is terrible around 10Go/hour.
I change tsafs.conf with the following settings

cluster=enable
cachememorythreshold=10
readaheadthrottle=2
# readbuffersize=65536
readbuffersize=131072
readthreadallocation=100
#readthreadsperjob=4
readthreadsperjob=8
#tsamode=Linux
tsamode=NetWare
#cachingmode=ensable
cachingmode=disable

The smdrd.conf is fairly standard

hosts: enable
autoload: tsafs --EnableGW
autoload: tsands
priority: slp, hosts
uds: enable
legacyconnections: enable
dataencryption: optional

slprefreshtime: 65535