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16 Data Replication Manager HSG80 ACS Version 8.7P Release Notes
Association Sets
In a Windows NT- X86 cluster configuration, all remote copy sets within an association set
must be placed in one cluster resource group.
Novell NetWare
NetWare Cluster Services (NWCS)
NWCS v1.01 SP1 for NetWare 5.1 and NWCS v1.6 for NetWare 6 are supported at the
initiator and target sites. Stretch clusters are not supported at this time. A stretch cluster is
defined as having a NetWare Cluster using NWCS with cluster members located at both the
DRM initiator and target sites. NWCS supports both remote copy set and nonremote copy set
LUNs.
Planned Failover/Failback with NWCS
When preparing the initiator and target sites for a planned failover/failback, use caution when
removing access to the LUNs at the initiator site. Removing access to the split brain detector
(SBD) partition, as well as the cluster volumes, without first bringing down the cluster will
result in server abends. To avoid cluster members abending, issue the following command at
the system console:
CLUSTER DOWN
You can also run ULDNCS.NCF at the system console for each cluster member to unload
cluster services completely.
NetWare 6 Storage Planning Considerations
If you plan on using Novell Storage Services (NSS) logical volumes in a DRM configuration,
you should be aware that the nature of Novell's Distributed File Services (DFS) allows you to
span an NSS volume across multiple hard disk partitions. This is not desirable in a DRM
configuration. Instead, you should maintain a one-to-one relationship among LUNs, remote
copy sets, NSS partitions, NSS pools, and NSS logical volumes.
Additional Instructions for Failover/Failback
When NetWare volumes are created at the initiator site, they are inserted into the Novell
Directory Services (NDS) tree as servername_volumename (for example, SERVER1_VOL1).
After a site failover, the replicated NetWare volumes are still available and can be mounted by
any NetWare server at the target site, but the volumes will now take on the new server name
(for example, SERVER2_VOL1). In addition, they will not be automatically inserted into
NDS, and for traditional NetWare volumes only, they will not maintain the file system
permissions established at the initiator site. You MUST perform the following steps the first
time failed-over volumes are mounted at the target site:
Traditional NetWare Volumes
After failing over to the target site and mounting the NetWare volumes:
1. Type nwconfig from the file server console.
2. Select Directory Options.
3. Select Upgrade Mounted Volumes into the Directory, and supply an
administrator-equivalent userid and password.