我有一个 SQL Server 2005 企业版，其维护计划经常失败并出现以下错误：
backup MYSERVER (MYSERVER)
Backup Database on MYSERVER
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All databases
Type: Differential
Append existing
Task start: 2011-10-18T00:10:09.
Task end: 2011-10-18T00:10:09.
Failed:(-1073548784) Executing the query "BACKUP DATABASE [model] TO DISK = N'\\myNetworkDrive\\opovo\\BackupSQL\\MYSERVER\\model\\model_backup_201110180010.bkp' WITH DIFFERENTIAL , RETAINDAYS = 13, NOFORMAT, NOINIT, NAME = N'model_backup_20111018001008', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "Cannot open backup device 'C:\\Program Files\\Microsoft SQL Server\\MSSQL.1\\MSSQL\\Backup\\Arca\\opovo\\BackupSQL\\MYSERVER\\model\\model_backup_201110180010.bkp'. Operating system error 3(The system cannot find the path specified.).
BACKUP DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
但是查询：
BACKUP DATABASE [model] TO DISK = N'\\myNetworkDrive\\opovo\\BackupSQL\\MYSERVER\\model\\model_backup_201110180010.bkp' WITH DIFFERENTIAL , RETAINDAYS = 13, NOFORMAT, NOINIT, NAME = N'model_backup_20111018001008', SKIP, REWIND, NOUNLOAD, STATS = 10
正常运行并给我预期的结果。
这是一个错误吗？我在这里想念什么？备份到网络位置的优雅方法是什么？