we will run GroupWise on SLES 10 or/and OES2.

How can I cluster Novell GroupWise 8 ?

do I need Novell Cluster Service(comes with OES Linux) ?

or
do I need Linux-HA ?

or
is there any thing built-in in GroupWise that can run it in Clustered environment.

actually we are comparing GroupWise with other product... and the other product has its own built-in Clustering capabilities(I mean no Linux-HA required, or no NCS type clustering tool required)

Regards
needee