Verifying that the nodes see the same disk

To confirm whether a disk (or LUN) supports SCSI-3 persistent reservations, two nodes must simultaneously have access to the same disks. Because a shared disk is likely to have a different name on each node, check the serial number to verify the identity of the disk. Use the vxfenadm command with the -i option to verify that the same serial number for the LUN is returned on all paths to the LUN.

For example, an EMC disk is accessible by the /dev/rdsk/c2t13d0s2 path on node A and the /dev/rdsk/c2t11d0s2 path on node B.

To verify that the nodes see the same disks

  1. Verify the connection of the shared storage for data to two of the nodes on which you installed Cluster Server.
  2. From node A, enter the following command:
    # vxfenadm -i /dev/rdsk/c2t13d0s2
    Vendor id       : EMC     
    Product id      : SYMMETRIX 
    Revision        : 5567
    Serial Number   : 42031000a

    The same serial number information should appear when you enter the equivalent command on node B using the /dev/rdsk/c2t11d0s2 path.

    On a disk from another manufacturer, Hitachi Data Systems, the output is different and may resemble:

    # vxfenadm -i /dev/rdsk/c2t1d0s2
    Vendor id       : HITACHI 
    Product id      : OPEN-3      -SUN
    Revision        : 0117
    Serial Number   : 0401EB6F0002

    Refer to the vxfenadm(1M) manual page for more information.