We recently found there are quite a few error logs in sql log:
Message
BackupVirtualDeviceFile::PrepareToFreeze: failure on backup device '{4FEEA406-DD73-47D8-BC10-0ADAD6A44D6D}1'. Operating system error 995(The I/O operation has been aborted because of either a thread exit or an application request.).
BACKUP failed to complete the command BACKUP DATABASE ADWDB. Check the backup application log for detailed messages.
We didn't schedule any SQL agent job backup the databases. And as a dba, I don't think we have any other places scheduled SQL jobs.
But our network side do have Unitrends to backup the whole server system.
We are not sure if this error is from there.
Any clues?