ORACLE备份库到共享目录问题

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在AIX下将表导出到NFS上
oracle@localhost:/home/oracle $expdp ora/ora tables=test directory=DMPDIR dumpfile=test.dmp
会报如下错误：
Export: Release 10.2.0.5.0 - 64bit Production on Friday, 27 May, 2011 10:58:57
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "/mnt/share/test.dmp"
ORA-27086: unable to lock file - already in use
IBM AIX RISC System/6000 Error: 49: No locks available
Additional information: 10

处理办法：
将/etc/filesystems中参数改为
/mnt/share:
dev = "/mnt/nasdatavg/nasdatalv/nas"
vfs = nfs
nodename = 10.0.0.2
mount = false
options = bg,hard,nointr,noac,llock,rsize=32768,wsize=32768,sec=sys,nosuid
account = false

对应LINUX为nolock.