The problem here is not with your disk agents, it is with the media agent
[Major] From: BSM@manp2.fnp.local "Netware-Enterprise-Data" Time: 03/09/2013 6:15:09 AM
Host for library HP:MSL G3 Series not found.
Go into Devices and Media, right-click on the Library 'HP:MSL G3 Series', get Properties. Check the hostname in the Client field. What this message is saying is that this host name is not resolvable by the cell manager
From the MS-DOS prompt on the cell manager, see if you can resolve it
nslookup [media agent hostname] Do not include the [ ] marks