expdp直接导出文件到NFS共享的挂载目录，报错ORA-27086: unable to lock file - already in use

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报错信息：

[oracle@szmlserver95_217 expdpback]$ cat !$
cat j10dba_20120809.log
;;;
Export: Release 11.2.0.1.0 - Production on Thu Aug 9 11:09:50 2012

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
;;;
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "/backup/expdpback/j10dba_217_20120809.dmp"
ORA-27086: unable to lock file - already in use
Linux-x86_64 Error: 37: No locks available
Additional information: 10

解决方法：挂载时使用nolock参数即可

# unmount /backup

# mount -o nolock 10.13.12.11:/data4/111.197.25.29back /backup/