Suspect
SQL Server Database in Suspect mode
I’m going to preface by saying, I ran into a specific scenario and I strongly suggest you see if this scenario is what’s currently affecting you before you try these troubleshooting steps.
Scenario and problem
Recently, a database of mine was placed into Suspect mode. This database is part of a two-node Availability Group. The primary problem was that the Transaction Log drive filled up on space, this caused the DB to be placed into suspect mode. Once the DB was in suspect mode, my backups began failing. (Because the DB was inaccessible and caused the job to fail.)