When a new software level is committed, you might not be
able to return to a previous software level because some data structures
might have been changed such that they cannot be used with the previous
software level. Therefore, if you have any problems, you must install
the newest level of the software.
Attention: This procedure causes a loss of all data
that is currently configured in the cluster. This procedure must only
be used as a last resort and should only be done if you have recently
backed-up your data.
In extreme conditions where you cannot
wait for a software update and you need to return to the previous
software level, you can use the following procedure.
Attention: This procedure causes the total loss of the SAN Volume Controller cluster.
This procedure must only be used as a last resort.
Perform
the following steps to reset from software upgrade problems:
- Power off all but one of the nodes that are in the cluster.
- Set the powered-on node to service access mode.
- Use the service access mode functions to force the download
of the older software level.
- Repeat the action for each of the failed nodes.
- Use a node with a new software level to create a new cluster.