In order to return an Exchange 2013 system to life, I had to resolve a full disk. So full that I couldn't even create a backup.
So I used fsutil to delete the journal, which freed 330MB and allowed me to run the system backup which cleared out the transaction logs.
I can't find much on the deletejournal command, but can someone tell me do I have to RECREATE the journal after my backup is done (and I have lots of free space again)? Or is it automatically recreated? (It's a Windows 2008 server0