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Sun Cluster 3.0 12/01 Hardware Guide

How to Create a Logical Volume

Use this procedure to create a StorEdge T3/T3+ array logical volume. This procedure assumes all cluster nodes are booted and attached to the array that will host the logical volume you are creating.

  1. Telnet to the array that is the master controller unit of your partner-group.

    The master controller unit is the array that has the interconnect cables attached to the right-hand connectors of its interconnect cards (when viewed from the rear of the arrays). For example, Figure 9-1 shows the master controller unit of the partner-group as the lower array. Note in this diagram that the interconnect cables are connected to the right-hand connectors of both interconnect cards on the master controller unit.

  2. Create the logical volume.

    Creating a logical volume involves adding, initializing, and mounting the logical volume.

    For the procedure on creating and initializing a logical volume, see the Sun StorEdge T3 and T3+ Array Administrator's Guide. For the procedure on mounting a logical volume, see the Sun StorEdge T3 and T3+ Array Installation, Operation, and Service Manual.

  3. On all cluster nodes, update the /devices and /dev entries:


    # devfsadm

  4. On one node connected to the partner-group, use the format command to verify that the new logical volume is visible to the system.


    # format

    See the format command man page for more information about using the command.

  5. Are you running VERITAS Volume Manager?

    • If not, go to Step 6

    • If you are running VERITAS Volume Manager, update its list of devices on all cluster nodes attached to the logical volume you created in Step 2.

    See your VERITAS Volume Manager documentation for information about using the vxdctl enable command to update new devices (volumes) in your VERITAS Volume Manager list of devices.

  6. If needed, partition the logical volume.

  7. From any node in the cluster, update the global device namespace.


    # scgdevs
    Note -

    If a volume management daemon such as vold is running on your node, and you have a CD-ROM drive connected to the node, a device busy error might be returned even if no disk is in the drive. This error is expected behavior.

Note -

Do not configure StorEdge T3/T3+ logical volumes as quorum devices in partner-group configurations. The use of StorEdge T3/T3+ logical volumes as quorum devices in partner-group configurations is not supported.

Where to Go From Here

To create a new resource or reconfigure a running resource to use the new logical volume, see the Sun Cluster 3.0 12/01 Data Services Installation and Configuration Guide.