Reverting to the previous server version in a cluster configuration

Carefully follow the preparation steps before you upgrade the server. By doing so, it might be possible to revert to the previous version of the IBM® Storage Protect server with minimal loss of data.

Before you begin

If you must revert to the previous version of the server after an upgrade, you must have the server installation media for your original version. You must also have the following items from the earlier version of the server:

Server database backup
Volume history file
Device configuration file
Server options file

Steps for reverting to the previous server version

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Carefully follow the preparation steps before you upgrade the server. By doing so, it might be possible to revert to the previous version of the server with minimal loss of data.

About this task

Complete the following steps on the system that you are preparing, for example, the Version 8.1.7 server.

Procedure

Delete the IBM Storage Protect server resource and the network resource in Microsoft Failover Cluster Manager.
1. Open Failover Cluster Manager. Under Other Resources, right-click the IBM Storage Protect instance resource. Select Take this resource offline.
2. Delete the IBM Storage Protect instance.
3. Under Server Name, expand the network name and record the cluster TCP/IP address.
4. Delete the network name.
Remove the IBM Db2® cluster from the instance by issuing the following command:
```
DB2mscs -u:instance_name	     
```
For example, if the server instance is Server1, enter the command:
```
db2mscs -u:Server1
```
Tip: You might see an error message about a missing cluster resource. Disregard this message.
Remove the database.
One way to remove it is by issuing this command:
```
dsmserv removedb tsmdb1
```
```
dsmserv -k instance_name removedb tsmdb1
```
On each system in the cluster, delete the V 8.1.7 tsmsvrrsc DLL files by completing the following steps:
1. Stop the cluster service. One way to stop it is by using the Services Application. Right-click Cluster Service and select Stop.
2. Delete the tsmsvrrscexX64.dll and tsmsvrrscx64.dll files from the C:\Windows\Cluster directory.
3. Start the cluster service. One way to start it is by using the Services Application. Right-click Cluster Service and select Start.
Use the uninstallation program to uninstall the V8.1 server. Uninstallation removes the server and the database manager, with their directories.
Clean up the database and recovery log directories if you are reusing them.
Stop the cluster service. Reinstall the version of the server program that you were using before the upgrade to V8.1.7. This version must match the version that your server was running when you created the database backup that you restore in a later step. For example, the server was at V7.1.8 before the upgrade, and you intend to use the database backup that was in use on this server. You must install the V7.1.8 fix pack to be able to restore the database backup.
Copy the following files to the instance directory.
- Device configuration file
- Volume history file
- The server options file (typically dsmserv.opt)
Use the configuration wizard (dsmicfgx) to recreate the server instance.
Restore the database to a point in time before the upgrade.