NBU server：
系统：Microsoft Windows Server 2008 R2 Enterprise 64-bit
NBU master 版本：7.5
hostname：WIN-SOL2DE4OOTA
EXCHANGE server：
系统：Microsoft Windows Server 2008 R2 Enterprise 64-bit
exchange版本：exchange server 2010 14.03.0123.003
hostname：TEST-XXEX
恢复时，日志信息：
2014/7/29 9:28:53 - begin Restore
2014/7/29 9:28:56 - restoring image TEST-XXEX_1406596279
2014/7/29 9:29:01 - Info bprd(pid=828) Restoring from copy 1 of image created 07/29/14 09:11:19
2014/7/29 9:29:03 - Info bpbrm(pid=4356) TEST-XXEX is the host to restore to
2014/7/29 9:29:03 - Info bpbrm(pid=4356) reading file list from client
2014/7/29 9:29:04 - connecting
2014/7/29 9:29:04 - Info bpbrm(pid=4356) starting bptm
2014/7/29 9:29:11 - Info tar32(pid=6780) Restore started
2014/7/29 9:29:11 - connected; connect time: 00:00:07
2014/7/29 9:29:11 - Info bptm(pid=784) start
2014/7/29 9:29:11 - started process bptm (784)
2014/7/29 9:29:11 - Info bpdm(pid=784) reading backup image
2014/7/29 9:29:11 - Info bptm(pid=784) using 30 data buffers
2014/7/29 9:29:11 - Info bptm(pid=784) spawning a child process
2014/7/29 9:29:11 - Info bptm(pid=784) child pid: 880
2014/7/29 9:29:12 - Info bptm(pid=880) start
2014/7/29 9:29:12 - started process bptm (880)
2014/7/29 9:29:12 - begin reading
2014/7/29 9:29:19 - Error bpbrm(pid=4356) from client TEST-XXEX: ERR - All Exchange databases must be manually dismounted prior to attempting the restore (or select Dismount in restore GUI).
2014/7/29 9:29:19 - Error bpbrm(pid=4356) from client TEST-XXEX: ERR - Aborting restore: Error writing Exchange object: Microsoft Information Store:\GPGC DB1\ Error: BEDS 0x0:
2014/7/29 9:29:19 - Info tar32(pid=6780) done. status 5
2014/7/29 9:29:19 - Info tar32(pid=6780) done. status: 185
2014/7/29 9:29:19 - Info bptm(pid=784) EXITING with status 24 <----------
2014/7/29 9:29:19 - Info tar32(pid=6780) done. status: 24: socket write failed
2014/7/29 9:29:19 - Error bpbrm(pid=4356) client restore EXIT STATUS 24: socket write failed
2014/7/29 9:29:19 - restored image TEST-XXEX_1406596279 - (socket write failed(24)); restore time 00:00:23
2014/7/29 9:29:19 - end Restore; elapsed time: 00:00:26
MS-Exchange-Server policy restore error(2810)
请帮忙指点一下，谢谢！