Trial Version of BE2012 support tape library backup multiple jobs in two drives??

Dear bor/sis,

Our seniario Our scenario:

One HP Tape Library with 2 drives

One HP Server

One SAN Switch

Now I am using the SAN Switch connected between Tape Library with 2 drives and Server via fiber channel. I got the 2 problem in my farm.

1. I cannot run the backup job in the second tape drive, but when I click the inventory that the 2 tape drives can mount media in the tape drives. When I try to run 2 backup job, only 1 job can be backup, other one prompt the warning message “Please insert overwritable media” I don’t know why the message will show on the second job, since 2 media is set to the same media set.
2. Backup exec 2010 upgrade to Backup exec 2012, after upgrading the BE2012, I cannot backup the Exchange DAG Database, I try to run the credential test, but it show “test failed”, I don’t know why I am using the same account to upgrade the system will show this result and cannot backup.

Please help me !!

Many Many Thanks,

Kelvin.W@HK