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Knowledgebase : > Troubleshoot Backup for Files > Open File Backup/VSS Errors
\n\nSymptoms \n\n System state backups start to fail on SBS2011 or servers with SharePoint 2010 installed on them. Additionally, when backups attempt to take a VSS snapshot, the backup job may stall for 30 minutes (and eventually the watchdog timer wil...
Overview The product uses the 'volume shadow copy' (VSS) technology built in to Windows to safely perform backups of open files. VSS provides the functionality to take a snapshot of a volume, allowing backups to backup data from the unchanging snapsho...
Problem Open file backup fails with E_UNEXPECTED (0x8000FFFF), and the log indicates that the VSS MSDEWriter failed with failure code 0x800423F4.This error has three known causes:The SQL Server (MSDE) volume shadow copy writer fails when the SQL Server ...
Problem Open file backup fails to initialize because of the error E_UNEXPECTED (0x8000ffff).This can be caused by many of the internal Microsoft components that are part of your operating system. This is Microsoft's generic error message to say that som...
Problem Open file backup fails with error messages similiar to the following: INFO: Initializing open file backup [C:\] {VSS-WS03.dll} INFO: VSS: ERROR: Error during the last asynchronous operation. INFO: VSS: ERROR: - Returned HRESULT = 0x8...
Problem Open file backup fails with error messages similiar to the following: INFO: Initializing open file backup [C:\] {VSS-XP.dll} INFO: VSS: ERROR: Error during the last asynchronous operation. INFO: VSS: ERROR: - Returned HRESULT = 0x800...
Situation: In the Online Backup Manager logs you find the following entries: 2014-12-11 01:02:52 INFO: Initializing open file backup [C:\] [X:\] {VSS-WS03.dll} 2014-12-11 01:02:53 INFO: VSS: ERROR: COM call "m_pVssObject->AddToSnapshotSet((LPWSTR)volu...
Overview and Symptoms The backup engine uses Microsoft VSS to perform backups of open files and also to backup the system state. VSS consists of providers (which provide volume snapshot functionality), writers (application components that ensure the in...