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Sun Cluster 3.0 5/02 Supplement

How to Set the Number of Metadevice Names and Disksets (5/02)

The following changes were introduced in the Sun Cluster 3.0 5/02 update release and applies to this update and all subsequent updates to Sun Cluster 3.0 software.

Metadevice-name maximum - The following are corrections to Step 1 and Step 2. The correct maximum number of metadevice names each Solstice DiskSuite (Solaris 8) diskset can have is 1024. For Solaris Volume Manager (Solaris 9), the maximum is 8192 metadevice names per diskset, as documented in the Sun Cluster 3.0 12/01 Software Installation Guide.

  1. Calculate the largest metadevice name you need for any diskset in the cluster.

    Each diskset can have a maximum of 1024 metadevice names. You will supply this calculated value for the nmd field.

    1. Calculate the quantity of metadevice names you need for each diskset.

      If you use local metadevices, ensure that each local metadevice name is unique throughout the cluster and does not use the same name as any device ID (DID) in the cluster.

      Tip ( only) -

      Choose a range of numbers to use exclusively for DID names and a range for each node to use exclusively for its local metadevice names. For example, DIDs would use names in the range from d1 to d100, local metadevices on node 1 would use names in the range from d100 to d199, local metadevices on node 2 would use d200 to d299, and so on.

    2. Determine the largest of the metadevice names to be used in any diskset.

      The quantity of metadevice names to set is based on the metadevice name value rather than on the actual quantity. For example, if your metadevice names range from d950 to d1000, Solstice DiskSuite software requires 1000 names, not 50.

  2. Calculate the total expected number of disksets in the cluster, then add one for private disk management.

    The cluster can have a maximum of 31 disksets, not including the diskset for private disk management. The default number of disksets is 4. You will supply this calculated value for the md_nsets field.