Exchange 2010 not backing up

Yba02 used Ask the Experts™
I have a single Exchange 2010 SP1 server, member of a 2008 domain.  Everything works fine.  The server has been setup but almost idle till, recently, users shifted to it with some 6 GB volume of emails from their old IMAP email system.
Overnight, some 80,000 log files were generated and the drive containing Windows got jammed.  To solve this, I thought of backing up Exchange and have the log files deleted.  Unfortunately, Windows Server Backup could not create a shadow copy because of space issue on the Windows drive (C) and thus backup could not start.  To solve this, I moved all log files to another drive and kept only the latest few 100's.
Now, it can backup with success.  However, every time it ends up with a warning that the backup file generated cannot be used to restore an Exchange DB.  Also, log files are not deleted.

To overcome this situation, I created another DB and had it mounted.  However, I am not sure how to make it the master DB so that I can dismount and eventually delete the default DB.

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You have to move all the mailboxes to the other DB.
Then you can remove the original one..

Also you can do one thing.

Dismount the DB.
Check if the database is consistance by running eseutil /mh.
It should be consistance.

If it is consistence then move all the logs to other drive and mount the database.
Then take a backup.
Actually is the database is consistance then it does not need any log files.

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