Where to Go From Here
After you install multipathing software, you might want to install Sun Cluster software. For the procedure on how to install Sun Cluster software, see Sun Cluster software installation documentation .
Adding Multipathing Software
This section contains a procedure on how to add multipathing software in a running cluster. Choose one of the following multipathing solutions.
How to Add Sun StorEdge 9900 Dynamic Link Manager Software
Use this procedure to add Sun StorEdge 9900 Dynamic Link Manager (Sun SDLM) software in a running cluster. This procedure assumes that you installed and configured your storage array. If you have not installed your storage array, see How to Install Sun StorEdge 9900 Dynamic Link Manager Software to add multipathing software and the storage array at the same time.
Do not use this procedure to convert from host-based mirroring to a multipathing solution. For the procedure on how to convert from host-based mirroring to a multipathing solution, contact your Sun service provider.
Perform this procedure on one node at a time. This procedure defines Node N as the node on which you are installing the multipathing software.
Determine the resource groups and device groups that are running on Node N.
Record this information because you use this information in Step 11 of this procedure to return resource groups and device groups to these nodes.
# scstat
For more information, see the Sun Cluster system administration documentation.
Move all resource groups and device groups off Node N.
# scswitch -S -h from-node
For more information, see the Sun Cluster system administration documentation.
Do you need to install additional physical paths between Node N and the storage?
Note - If you use multipathing software, each node requires two paths to the same set of LUNs. For an example configuration, see Figure 2-1.
For the procedure on how to install host adapters, see the documentation that shipped with your host adapters and nodes.
Shut down and power off Node N.
For the full procedure on how to shut down and power off a node, see Sun Cluster system administration documentation.
Install the host adapters and the cables between Node N and the storage.
For the procedure on how to install host adapters, see the documentation that shipped with your host adapters and nodes.
Power on and boot Node N into non-cluster mode.
For more information on booting nodes, see Sun Cluster system administration documentation.
If necessary, upgrade the host adapter firmware on Node N.
See the Sun Cluster release notes documentation for information about accessing Sun's Info Docs on http://sunsolve.sun.com. The Info Docs list information about required patches and firmware that are available for download. For the procedure about how to apply host adapter firmware, see the firmware patch README file.
Install and configure Sun SDLM software on Node N, and apply required patches for Sun SDLM software support on Node N.
For instructions on how to install and configure the Sun SDLM software, see the documentation that shipped with your storage array.
Did you perform a reconfiguration reboot when you configured Sun SDLM software?
If yes, proceed to Step 10.
If no, perform a reconfiguration reboot to create the new Solaris device files and links on Node N.
On Node N, update the paths to the device ID (DID) instances.
# scdidadm -C # scdidadm -r
Return the resource groups and device groups that you identified in Step 1 to Node N.
# scswitch -z -g resource-group -h nodename # scswitch -z -D device-group-name -h nodename
For more information, see the Sun Cluster system administration documentation.
On all remaining nodes and one node at a time, repeat Step 1 through Step 11.
How to Add Sun StorEdge Traffic Manager Software
Use this procedure to add Sun StorEdge Traffic Manager software in a running cluster. This procedure assumes that you installed and configured your storage array. If you have not installed your storage array, see How to Install Sun StorEdge Traffic Manager Software to add multipathing software and the storage array at the same time.
Do not use this procedure to convert from host-based mirroring to a multipathing solution. For the procedure on how to convert from host-based mirroring to a multipathing solution, contact your Sun service provider.
Perform this procedure on one node at a time. This procedure defines Node N as the node on which you are installing the multipathing software.
Determine the resource groups and device groups that are running on Node N.
Record this information because you use this information in Step 14 of this procedure to return resource groups and device groups to these nodes.
# scstat
For more information, see the Sun Cluster system administration documentation.
Move all resource groups and device groups off Node N.
# scswitch -S -h from-node
For more information, see the Sun Cluster system administration documentation.
Do you need to install additional physical paths between Node N and the storage?
Note - If you use multipathing software, each node requires two paths to the same set of LUNs. For an example configuration, see Figure 2-2.
Shut down and power off Node N.
For the full procedure on how to shut down and power off a node, see Sun Cluster system administration documentation.
Install the host adapters and the cables between Node N and the storage.
Note - If you use multipathing software, each node requires two paths to the same set of LUNs.
For the procedure on how to install host adapters, see the documentation that shipped with your host adapters and nodes.
Power on and boot Node N into non-cluster mode.
For more information on how to boot nodes, see Sun Cluster system administration documentation.
If necessary, upgrade the host adapter firmware on Node N.
See the Sun Cluster release notes documentation for information about accessing Sun's Info Docs on http://sunsolve.sun.com. The Info Docs list information about required patches and firmware that are available for download. For the procedure about how to apply host adapter firmware, see the firmware patch README file.
Install any required patches or software for Sun StorEdge Traffic Manager software support on Node N.
For instructions on installing the software, see the Sun StorEdge Traffic Manager Installation and Configuration Guide at http://www.sun.com/products-n-solutions/hardware/docs/.
Edit the /kernel/drv/scsi_vhci.conf file to activate the Sun StorEdge Traffic Manager software. Set the mpxio-disable parameter to no.
mpxio-disable="no"
Boot Node N into cluster mode.
For more information on booting nodes, see Sun Cluster system administration documentation.
On each node connected to the storage array, use the format(1M) command. Use this command to verify that the same set of LUNs is visible to the expected controllers.
# format
See the format command man page for more information about by using the command.
On Node N, configure all controllers that are affected by the new physical path.
# cfgadm -c configure cN
On Node N, update the paths to the device ID (DID) instances.
# scdidadm -C # scdidadm -r
Return the resource groups and device groups that you identified in Step 1 to Node N.
# scswitch -z -g resource-group -h nodename # scswitch -z -D device-group-name -h nodename
For more information, see the Sun Cluster system administration documentation.
On each node connected to the storage array, use the format(1M) command. Use this command to verify that you see half the number of disks you saw in Step 11.
# format
See the format command man page for more information about by using the command.
On all remaining nodes and one node at a time, repeat Step 1 through Step 14.