Recently we came an issue where we couldn’t back up Exchange via DPM and the following error was given “DPM has detected a discontinuity in the log chain for Storage group First Storage Group on servername since the last synchronization. (ID 30216 Details: Unspecified error (0x80004005))”
After researching the event id most articles pointed to circular logging be enabled as the culprit but this was not the case as it was turned off.
- Take a backup of the Exchange databases, the Storage Groups logs and chk file, by first dismounting the stores and taking a copy to a different location.
- Delete the Storage Groups logs and chk file
- Mount the Exchange Databases
- Run DPM Backup and this should complete