I've set up a test mirrored database with the following steps:<br />-- created endpoints<br />-- backed up Primary database<br />-- restored with no recovery on Mirror<br />-- Set partner: ALTER DATABASE test <br /> SET PARTNER = 'TCP://instance<img src='/community/emoticons/emotion-4.gif' alt='' />ort'<br />on both Primary and Mirror<br />-- I kept the default of High protection (Safety FULL) - no witness<br /><br />The primary shows (Principal, Synchronized). The mirror shows (Mirror, Syncronized / restoring). <br /><br />I'm trying to test a simulated failure of the Principal so I can't manually failover from the Principal. According to what I've read on BOL, I need to use Alter database name set partner FORCE_SERVICE_ALLOW_DATA_LOSS if the Principal is not available. However, when I do that I get the following error message: <br />Msg 1455, Level 16, State 106, Line 1<br />The database mirroring service cannot be forced for database "test" because the database is not in the correct state to become the principal database.<br /><br />Any suggestions? What step have I forgotten/missed?? Thanks much!