Shared Storage; Novell Cluster Services; Novell Storage Services - Novell OPEN ENTERPRISE SERVER 2 SP 2 - CLUSTER SERVICES 1.8.7 FOR LINUX Manual

10.1.1 Shared Storage

You should carefully plan how you want to configure your shared storage prior to installing Novell
Cluster Services. Consider the guidelines and requirements in the following sections when planning
your NSS storage solution.
Section 3.1.4, "Shared Disk System Requirements," on page 36
Section 3.1.5, "SAN Rules for LUN Masking," on page 38

10.1.2 Novell Cluster Services

You must install Novell Cluster Services before you can create shared disk partitions and pools on
shared storage (storage area network, or SAN). Novell Cluster Services must be loaded and running
when you create and use the shared NSS pools and volumes.
In a mixed-cluster of NetWare
resources that were created on a NetWare cluster node can be failed over between the Linux and
NetWare nodes.
No storage management functions should be executed while a cluster is in a mixed-cluster mode. Do
not attempt to create, delete, expand, or modify the properties for devices, partitions, pools, or
volumes for any shared resources in the cluster.
WARNING: Attempting to reconfigure shared storage in a mixed cluster can cause data loss.

10.1.3 Novell Storage Services

In order to use NSS pools and volumes in cluster resources, NSS must be installed and running on
each server in the cluster. You can use the Storage plug-in for Novell iManager or the server-based
NSSMU (NSS Management Utility) tool to create and cluster-enable a shared NSS pool, and to
create NSS volumes on those pools.
For information on NSS system and network requirements, see
in the OES 2 SP2: NSS File System Administration
For information on installing NSS when you install Novell Cluster Services, see
IMPORTANT: As a best practice, we recommend a single LUN (or device) per shared pool, and
one volume per pool. (one LUN=>one pool=>one volume)
You must create at least one volume in the shared pool. Typically, all volumes for a shared pool are
created when you initially set up the pool cluster resource and before you need to cluster migrate or
fail over the resource to a different node in the cluster. You can add volumes to the pool later by
cluster migrating the pool cluster resource back to the original server node in the cluster where the
pool was created. If the pool does not reside on the original node, you get an eDirectory error
because the tools only look for the Pool object under its current server node, and not under the
original node where it was created.
134 OES 2 SP2: Novell Cluster Services 1.8.7 for Linux Administration Guide
®
nodes and OES 1 or OES 2 Linux nodes, only NSS pool cluster
Guide.
"Requirements for Installing
Step 5 on page
NSS"
43.