We are running SQL Server 2008 R2 SP1. There is a scheduled transaction log backup using SQL Server maintenance job that runs at a certain time of the day. The job runs fine on few days and fails few days and there is no specific pattern. I changed the schedule to run every 5 minutes and the log backups were fine for the first 3 attempts and started failing randomly.
-- operating system error 53(the network path was not found.) --
I am not sure why it fails few times and runs fine the rest of the times. The backups are going directly to SAN storage and use UNC path - e.g. \\vnvx\SQL_backups\
SQL Server errorlog has the following messages:
Backup Error: 3041, Severity: 16, State: 1.
Error: 18204, Severity: 16, State: 1.
BackupDiskFile::CreateMedia: Backup device
'N:\Backups\Userdatabases\Database\db _backup_200911111511.bak' failed to
create. Operating system error 53(the network path was not found.)
If it fails on a regular basis I could have checked permissions, SQL Server agent start up ID etc. However it fails few times and runs successfully few times. The job is set to run with 1 retry after 2 minutes and sometimes the 2nd attempt goes through.
Please help. Thanks in advance.