How to Replace a Host Adapter

Several steps in this procedure require you to halt I/O activity. To halt I/O activity, take the controller module offline by using the RAID Manager GUI's manual recovery procedure in the Sun StorEdge RAID Manager User’s Guide.

Before You Begin

This procedure relies on the following prerequisites and assumptions.

• Your cluster is operational.

• The node on which the host adapter resides is attached to a SCSI-based storage array or storage system.

• This procedure defines Node A as the node with the host adapter on SCSI bus  A. This host adapter is the host adapter that you are replacing. Node B is the node that remains in service.

Steps

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

   # scstat

   Record this information because you will use it in Step 23of this procedure to return resource groups and device groups to this node.

2. Move all resource groups and device groups off Node A.

   # scswitch -s -h from-node

3. Without powering off the node, shut down Node A.

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

4. From Node B, halt I/O activity to SCSI bus A.

   For instructions, see the Sun StorEdge RAID Manager User’s Guide.

5. From the controller module end of the SCSI cable, disconnect the SCSI bus A cable. This cable connects the controller module to Node A. Afterward, replace this cable with a differential SCSI terminator.

6. Restart I/O activity on SCSI bus A.

   For instructions, see the Sun StorEdge RAID Manager User’s Guide.

7. Does servicing the failed host adapter affect SCSI bus B?

   • If no, skip to Step 11.

   • If yes, proceed to Step 8.

8. From Node B, halt I/O activity to the controller module on SCSI bus B.

   For instructions, see the Sun StorEdge RAID Manager User’s Guide.

9. From the controller module end of the SCSI cable, disconnect the SCSI bus B cable. This cable connects the controller module to Node A. Afterward, replace this cable with a differential SCSI terminator.

10. Restart I/O activity on SCSI bus B.

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

11. Power off Node A.

12. Replace Node A's host adapter.

    For the procedure about how to replace a host adapter, see the documentation that shipped with your node hardware.

13. Power on Node A. Do not enable the node to boot. If necessary, halt the system.

14. From Node B, halt I/O activity to the controller module on SCSI bus A.

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

15. Remove the differential SCSI terminator from SCSI bus A. Afterward, reinstall the SCSI cable to connect the controller module to Node A.

16. Restart I/O activity on SCSI bus A.

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

17. Did you install a differential SCSI terminator to SCSI bus B in Step 9?

    • If no, skip to Step 20.

    • If yes, halt I/O activity on SCSI bus B, then continue with Step 18.

18. Remove the differential SCSI terminator from SCSI bus B. Afterward, reinstall the SCSI cable to connect the controller module to Node A.

19. Restart I/O activity on SCSI bus B.

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

20. Bring the controller module online.

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

21. Rebalance all logical unit numbers (LUNs).

    For instructions, see the Sun StorEdge RAID Manager User’s Guide.

22. Boot Node A into cluster mode.

23. (Optional) Return resource groups and device groups to Node A.