Replacing a Node-to-Switch Component

Use this procedure to replace a node-to-switch component that has failed or that you suspect might be contributing to a problem.

Node-to-switch components that are covered by this procedure include the following components:

• Node-to-switch fiber-optic cables

• Gigabit interface converters (GBICs) or small form-factor pluggables (SFPs) on an FC switch

• FC switches

For the procedure about how to replace a host adapter, see How to Replace a Host Adapter.

This procedure defines Node A as the node that is connected to the node-to-switch component that you are replacing. This procedure assumes that, except for the component you are replacing, your cluster is operational.

Ensure that you are following the appropriate instructions:

• If your cluster uses multipathing, see How to Replace a Node-to-Switch Component in a Cluster That Uses Multipathing.

• If your cluster does not use multipathing, see How to Replace a Node-to-Switch Component in a Cluster Without Multipathing.

How to Replace a Node-to-Switch Component in a Cluster That Uses Multipathing

Steps

1. Is your configuration active-passive?

   If yes, and the active path is the path that needs a component replaced, make that path passive.

2. Replace the component.

   Refer to your hardware documentation for any component-specific instructions.

3. (Optional) If your configuration is active-passive and you changed your configuration in Step 1, switch your original data path back to active.

How to Replace a Node-to-Switch Component in a Cluster Without Multipathing

Steps

1. Check if the physical data path failed.

   If no, proceed to Step 2.

   If yes:

   1. Replace the component.

      Refer to your hardware documentation for any component-specific instructions.

   2. Fix the volume manager error that was caused by the failed data path.

   3. (Optional) If necessary, return resource groups and device groups to this node.

   You have completed this procedure.

2. Determine the resource groups and device groups that are running on Node A.

   # scstat

3. Move all resource groups and device groups to another node.

   # scswitch -s -h from-node

4. Replace the node-to-switch component.

   Refer to your hardware documentation for any component-specific instructions.

5. (Optional) If necessary, return the resource groups and device groups that you identified in Step 2 to Node A.

   # scswitch -z -g resource-group -h nodename # swswitch -z -D device-group -h nodename