The IT Melting Pot!

Beware before upgrading to SP1. SCCM does not support database mirroring and if you’ve configured it don’t just try to upgrade! Thx @agerlund!

As stated here SQL mirroring is not supported for the ConfigMgr database. However a technet article do not stop all database administrors’s from enabling the setting anyway believing that it will not cause any issues – but boy it does. SQL mirroring will break the SCCM SP1 upgrade process and leave the primary site server in a non-functional mode where a site restore is the only way back.

The issue can be found in the ConfigMgrSetup.log file.

Continue reading here!

//Richard