Hot upgrading a DS14 disk shelf and hot swapping LRC/ESHs

Tasks for hot upgrading and hot swapping

This section contains information about hot upgrading a DS14/DS14mk2 FC disk shelf to a cluster and how to hot swap an LRC/ESH module in a cluster. It describes the procedures in the following sections:

Requirements for upgrading and hot swapping

Upgrading a cluster that contains DS14/DS14mk2 FC disk shelves with LRC modules to a cluster containing DS14/DS14mk2 FC disk shelves with ESH modules requires that you exchange the LRC modules with ESH modules.

Hot upgrading your DS14 disk shelves

To convert your DS14/DS14mk2 FC disk shelves with LRCs into disk shelves with ESH modules, complete the following steps.

Step	Action
1	If the cluster is a...	Then...
	Standard cluster, mirrored cluster, non-switched MetroCluster, or switched MetroCluster	Take over the partner filer's disk shelves by entering the following command on the local filer: `cf takeover` Go to Step 2.
	Fabric Attached MetroCluster	Go to Step 2.
2	Note the terminator switch position of the LRC you are replacing. The new ESH module must be set to the same setting as the old LRC.
3	While grounded, unplug the cabling from the partner filer's disk shelves. Note the cable locations, especially if your cluster is a Fiber Attached MetroCluster.
4	Remove the Channel A loop LRCs of the partner's disk shelves and replace them with ESH modules.
5	Recable the disk shelves to their original locations before the ESH installation.
6	Check the operation of the new ESH modules by entering the following command from the local node console: environ shelf Result The local filer reports the status of the modified shelves as good.
7	If clustering was...	Then...
	Disabled	Return control of the partner filer's disk shelves by entering the following command: `cf giveback` Repeat Steps 2 through 6 for the Channel B loop.
	Not disabled	Repeat Steps 2 through 6 for the Channel B loop.
8	Repeat Steps 1 through 7 for the local filer.
9	Test the configuration as described in Chapter 1, Step 5: Completing setup and testing your cluster.

Hot swapping a single LRC/ESH module

To hot swap a single LRC/ESH module, complete the following steps.

Step	Action
1	Take over the partner filer's disk shelves by entering the following command on the local filer: cf takeover
2	Note the terminator switch position of the LRC or terminator and loop speed switches of the ESH you are replacing. The new LRC/ESH module must be set to the same settings as the old LRC/ESH.
3	While grounded, unplug the cabling from the target LRC/ESH module, then remove the module.
4	Slide the replacement LRC/ESH module into the slot at the rear of the disk shelf and push the levers of the CAM mechanism into place.
5	Reconnect the cabling to the replacement LRC/ESH.
6	Return control of the partner filer's disk shelves by entering the following command: cf giveback

Testing the LRC/ESH modules

To test your LRC/ESH modules, complete the following steps on both nodes.

Step	Action
1	Verify that all disk shelves with ESH modules are functioning properly by entering the following command: environ shelf Results The system reports the modules as good.
2	Verify that you can create and retrieve files on both nodes for each licensed protocol.
3	Verify there are no missing disks by entering the following command: vol status -r Result Local disks displayed on the local node should be displayed as partner disks on the partner node and vice-versa.

Step

Action

Verify that all disk shelves with ESH modules are functioning properly by entering the following command:

environ shelf

Results

The system reports the modules as good.

Verify that you can create and retrieve files on both nodes for each licensed protocol.

Verify there are no missing disks by entering the following command:

vol status -r

Result

Local disks displayed on the local node should be displayed as partner disks on the partner node and vice-versa.

Troubleshooting takeover or giveback failures

If takeover or giveback fails, complete the following steps.

Step	Action
1	Check the Channel B cabling on the disk shelves, and tighten any lose cables.
2	Check the cabling to the cluster interconnect adapter. Make sure that the cables are connected to the correct interconnect adapter ports and that they are secure.
3	Check communication between the nodes by entering the following command: cf status Result If there is a cabling error or the interconnect link is down, the system displays an error message indicating the error.
4	Check the parameters and option settings on your cluster with the cluster configuration checker script. This script is available for download from the NOW Web site at http://now.netapp.com/NOW/tools. Look for the cluster configuration checker (cf-config-check.cgi) file.
5	Check network connectivity. See the appropriate System Administration guide for more information.
6	Reboot the cluster and rerun the takeover and giveback tests.