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.

Steps

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.

   # scdidadm -C

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

   # scswitch -S -h from-node

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. Perform a reconfiguration boot to create the new Solaris device files and links.

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.