Creating multiple NDS partitions does not, by itself, increase fault tolerance or improve performance of the Directory. However, strategically using multiple replicas does.
Add a replica of a partition to a server to provide your Directory tree with
You can add a replica of a partition to a server from either the Tree View or the list of Partitions and Servers.
Select the partition that you want to replicate on a server.
Click Add Replica.
Click the browse button to select the server to place the replica on.
Select the NetWare Server object from the browser and click OK.
Select either Read/Write or Read-Only.
Click OK.
Confirm your request.