Just to make sure we are both on the same page, I am assuming you are now trying to install Zenoss core v3.2.1 on the new RHEL v6. Once you have this installed correctly, you can restore a backup made on the RHEL v5 Zenoss with the same version (it is not possible to upgrade from 3 to v4 using backup/restore).
First of all you must make sure of the following :
- both Zenoss and the CoreZenpack rpm must be the ones for the new platform (RHEL6)
- both your RHEL5 and RHEL6 must be the 64bit version if you want to preserve performance graphs since RRD files are different for 32bit and 64bit.
- always use "yum install" instead of "rpm -ivh" to install rpm packages
At the command line, please type "rpm -qa | grep -i zenoss" and post here the result.