We have a Novell NW65-SP5 tree with 3 clustered servers (Edir version connected to a SAN IBM system.
Last days only one server is able to load the cluster services. When we
run LDNCS.NCF on the other two servers, they cannot join the cluster
services as a node member and we receive the following messages:

Searching for SBD partition.
There is no SBD Partition required by the cluster!!!
Please run "SBD install" to create SBD partition.
SBD has reported a fatal error.

Which steps we must to perform to fix this problem?
The SBD partition must be installed in each server or it is needed only
one for each tree?