Cisco Cisco Unified IP Interactive Voice Response (IVR) 8.0(1) Installation Guide

Go back to the BARS server and, in the Backup Data Source Server page: 

Click the Selected servers radio button choose the server on which 
Cisco Unified Communications Manager is installed.

Click Start Backup Now.

When the backup completes, you are ready to perform the steps that are described 
in the 

After you back up your Cisco CRS 3.5(x) data and before you install the CRS 6.0 
software, you must re-image every server in the Cisco CRS cluster, including the 
Cisco Unified Communications Manager server.

If you are replacing any server with a new one, perform this procedure on the 
replacement server.

Before you re-image or replace a server, make a note of the following information:

Its host name.

Its IP address.

Each Data Source Name (DSN) that is required for the Database subsystem, 
if configured. You can view information about DSNs by choosing Start > 
Programs > Administrative Tools > Data Sources (ODBC).

Its NIC settings, if more than one NIC is installed on the server. Reconfigure 
the NICs with these settings after you re-image the server.

In addition, before you re-image a server, back up the C:\Program Files\Cisco\ 
Trace\BARS file from the BARS server. Also back up the log files that are shown 
in 

 from the Cisco CRS server (the server on which the Cisco CRS 

Engine is installed) to a location other than the server that you are re-imaging. 
These files can assist with troubleshooting upgrade issues, if necessary. For 
additional information about backup and restore log files, refer to Cisco IP 
Telephony Backup and Restore Administration (BARS) Guide.