Clustering

Have client with NSBS6.5 SP7 using the included 2-node cluster licence.
They want to migrate to a Linux platform; trouble is I can't see
anything about clustering in the Novell small business Linux products.
Does NOWS have clustering? Or what?

Client also wants to have the shared data volumes mirrored (that means 2
RAID 5 arrays, one a mirror of the other). They want to do this with
each half of the mirror on different sites, connected by GB fibre.
Current cluster setup is iSCSI with a NW65 server configured as the
shared data.

I have investigated using NSS mirroring which looks like it will work
for them. Has anyone any experience of a similar setup?

Which Novell Linux products include NSS? Or is there a different
mirroring product available in Linux?

Any ideas appreciated.

Thanks
Paul