Upgrading LRC modules to ESH or ESH2 modules

If the cluster is a...

Then...

Standard cluster, mirrored cluster, nonswitched MetroCluster, or switched MetroCluster

1. Take over the partner appliance's disk shelves by entering the following command on the local appliance:

   cf takeover

2. Go to Step 2.

Fabric Attached MetroCluster

Go to Step 2.

Note the terminate switch position of the LRC you are replacing. The new ESH module must be set to the same setting as the old LRC.

Note
ESH2 is self-terminating and does not have a termination switch.

While grounded, unplug the cabling from the partner appliance's disk shelves. Note the cable locations, especially if your cluster is a Fabric Attached MetroCluster.

Remove the Channel A loop LRCs of the partner's disk shelves and replace them with ESH/ESH2 modules.

Recable the disk shelves to their original locations before the ESH/ESH2 installation.

Check the operation of the new ESH/ESH2 modules by entering the following command from the local node console:

environ shelf

Result

The local appliance reports the status of the modified shelves as good.

If a cluster takeover...

Then...

Was performed in Step 1

1. Return control of the partner appliance's disk shelves by entering the following command:

   cf giveback

2. Repeat Step 2 through Step 6 for the Channel B loop.

Was not performed in Step 1

Repeat Step 2 through Step 6 for the Channel B loop.

Repeat Step 1 through Step 7 to add storage to the partner appliance.

Test the configuration, as described in Step 5: Checking and testing cluster configuration.