Novell OPEN ENTERPRISE SERVER 2 SP 2 - CLUSTER SERVICES 1.8.7 FOR LINUX Manual page 153

All servers in the cluster are connected to a shared storage system
One or more drive arrays are configured on the shared storage system
At least 20 MB of free space on the shared storage system for a special cluster partition
To ensure disaster recovery, the device you select to mirror should be in a different storage
array.
Use one of the following methods to mirror clustered pool resources:
"Creating a Pool on a Shared Mirrored Device" on page 153
"Mirroring the Partition of an Existing NSS Pool" on page 153
Creating a Pool on a Shared Mirrored Device
To create an NSS pool resource on a shared mirrored device:
1 Start NSSMU by entering
2 Share the devices.
2a Select Devices from the NSSMU main menu.
2b Select the two devices that you want to use, then press F6 to mark the devices as Sharable
for Clustering.
3 Create a mirrored RAID device using the shared devices.
3a Select RAID Devices from the NSSMU main menu.
3b Press Insert to create a software RAID, select RAID 1, then press Enter.
3c Use the arrow keys to select the two shared devices that you want to contribute space to
the RAID, specify the amount of space to use, then press Enter.
The software RAID device automatically inherits the Sharable for Clustering setting.
4 Create a clustered NSS pool on the shared RAID device.
4a Select Pools from the NSSMU main menu.
4b Press Insert to create a new pool, then create the clustered pool as usual on the shared
software RAID device.
Mirroring the Partition of an Existing NSS Pool
You can use NSSMU to mirror a clustered pool's partition. The second device must have as much
space available as you know the pool's real allocated size to be, and be marked as Sharable for
clustering. To mirror the partition for an existing clustered NSS pool resource:
1 Start NSSMU by entering
2 Share the second device.
2a Select Devices from the NSSMU main menu.
2b Select the device that you want to use, then press F6 to mark it as Sharable for Clustering.
To ensure disaster recovery, the device you select to mirror should be in a different storage
array.
3 Select Partitions from the NSSMU main menu.
4 Press F3, choose the partition that contains the pool (even though it might not look like it has
sufficient free space) and select the second shareable partition, then select Yes.
at the terminal console prompt of a cluster server.
nssmu
at the terminal console prompt of a cluster server.
nssmu
Configuring Cluster Resources for Shared NSS Pools and Volumes 153