How to Correct Mismatched Device ID Numbers

Use this section to correct mismatched device ID numbers that might appear during the creation of A3500FC LUNs. You correct the mismatch by deleting Solaris and Sun Cluster paths to the LUNs that have DID numbers that are different. After rebooting, the paths are corrected.

Use this procedure only if you are directed to do so from How to Create a LUN.

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.

Before You Begin

To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify RBAC authorization.

1. From one node that is connected to the storage system, determine the paths to the LUNs. These LUNs have different device ID numbers.

   # format

2. Remove the paths to the LUNs that have different device ID numbers.

   # rm /dev/rdsk/cNtXdY* # rm /dev/dsk/cNtXdY* # rm /dev/osa/dev/dsk/cNtXdY* # rm /dev/osa/dev/rdsk/cNtXdY*

3. Use the lad command to determine the alternate paths to the LUNs that have different device ID numbers.

   The RAID Manager software creates two paths to the LUN in the /dev/osa/dev/rdsk directory. Substitute the cNtXdY number from the other controller module in the storage array to determine the alternate path.

   For example, with this configuration.

   # lad c0t5d0 1T93600714 LUNS: 0 1 c1t4d0 1T93500595 LUNS: 2

   The alternate paths would be as follows.

   /dev/osa/dev/dsk/c1t4d1* /dev/osa/dev/rdsk/c1t4d1*

4. Remove the alternate paths to the LUNs that have different device ID numbers.

   # rm /dev/osa/dev/dsk/cNtXdY* # rm /dev/osa/dev/rdsk/cNtXdY*

5. On both nodes, remove all obsolete device IDs.

   • If you are using Sun Cluster 3.2, use the following command:

     # cldevice clear

   • If you are using Sun Cluster 3.1, use the following command:

     # scdidadm -C

6. Move all resource groups and device groups off the node.

   • If you are using Sun Cluster 3.2, use the following command:

     # clnode evacuate nodename

   • If you are using Sun Cluster 3.1, use the following command:

     # scswitch -S -h nodename

7. Shut down the node.

   For the procedure about how to shut down and power off a node, see your Sun Cluster system administration documentation.

8. To create the new Solaris device files and links, perform a reconfiguration boot by adding -r to your boot instruction.

   For more information about how to boot nodes, see Chapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

9. Repeat Step 1 through Step 8 on the other node. This node is attached to the storage system.

10. Return to How to Create a LUN.