NBU 7.5备份SQL Server 出错

系统环境如下

Windows 2003安装SQL Server 2000、NBU 7.5 Client

Windows 2003 安装NBU 7.5 Server，用本地硬盘作为备份storage

备份策略如下（Limit jobs per policy默认是0，备份出错后我修改成了1，但是依然出错，看来出错的原因和这个没关系？）

以下是备份出错提示

2013-7-30 1:40:07 - Info dbclient(pid=6084) Copyright (c) 1988-2003 Microsoft Corporation

2013-7-30 1:40:07 - Info dbclient(pid=6084) Enterprise Edition on Windows NT 5.2 (Build 3790: Service Pack 2)

2013-7-30 1:40:07 - Info dbclient(pid=6084) Batch = D:nbu_scriptbackup.bch, Op# = 29

2013-7-30 1:40:08 - Info dbclient(pid=6084) INF - Using backup image cwserver.MSSQL7.CWSERVER.db.U8DATA_002_2003.~.7.001of001.20130729175228..C

2013-7-30 1:40:08 - Info dbclient(pid=6084) INF - backup database "U8DATA_002_2003" to VIRTUAL_DEVICE='VNBU0-6084-4308-1375163550' with blocksize = 65536, maxtransfersize = 4194304, buffercount = 2

2013-7-30 1:40:08 - Info dbclient(pid=6084) INF - Number of stripes: 1, Number of buffers per stripe 2.

2013-7-30 1:40:08 - Info dbclient(pid=6084) INF - Created VDI object for SQL Server instance . Connection timeout is <300> seconds.

2013-7-30 1:40:55 - Info dbclient(pid=6084) ERR - Error in VxBSASendData: 1.

2013-7-30 1:40:55 - Info dbclient(pid=6084)
CONTINUATION: - All backup jobs have completed.

2013-7-30 1:40:55 - Info dbclient(pid=6084) ERR - Internal error. See the dbclient log for more information.

2013-7-30 1:40:55 - Info dbclient(pid=6084) ERR - Error in DBthreads::dbclient: 6.

2013-7-30 1:40:56 - Info dbclient(pid=6084)
CONTINUATION: - 系统找不到指定的文件。      

2013-7-30 1:40:56 - Info dbclient(pid=6084) ERR - Error in VxBSAEndData: 6.

2013-7-30 1:40:56 - Info dbclient(pid=6084)
CONTINUATION: - The handle used to associate this call with a previous VxBSAInit() call is invalid.

NBU提示找不到文件，这个文件是指什么文件？是数据文件或者日志文件？我到SQL Server端看了下，是能发现这两个文件的，现在NBU的job就一直处于active状态，但其实并没有持续备份文件