decommission a media server appliance

Hello, 
I am busy to decommission an media server appliance. Before I pull it out of Netbackup I am duplicating the images to another appliance. I scripted it. 

I have first made a list with images which are on the appliance. From that I made a script to see what images needed to be duplicated. Some images where already duplicated to the other appliance so I did an bpimagelist -L on all the images with a findstr on  "Object Descriptor" to see where images are. I redirected the output of the first script to a logfile. Then I checked that logfile to see what needed to be duplicated. The output was a logfile of a couple a 100.000 lines. It took me very much time to see what I needed to duplicate. In the end I had to duplicate around 50.000 images. When that script is finished I want to do a last check to see if I have everything before I can savely decommission the appliance. 

I can see no other way then do the same thing with generating a file with bpimagelist -L with a findstr. But this will give me a lot of work to check. Anybody knows a better way? 

Regards, 

Rob