【Oracle故障】ORA-27054 NFS file system where the file is created or resides is not mounted with correct options
在数据备份过程中，由于目标是使用NFS文件系统，因此在导入的时候遇到了BUG，报错如下：
ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "/exp/bak/expdp_01.dmp"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 6
通过查询metalink id :387700.1
文档上说可能的问题有以下几种：
a) The mount table (eg; /etc/mnttab) can be read to check the mount options
b) The NFS mount is mounted with the "hard" option
c) The mount options include rsize>=32768 and wsize>=32768
d) For RAC environments, where NFS disks are supported, the "noac" mount option is used.
文档上指出通过设置event 10298事件可以避免，不过设置event 10298需要重启数据库生效，目前为生产环境，这方法不能用。
通过调整上述的参数，hard，rsize，wsize都不能解决。
最后检查NFS的配置，发现客户端的/etc/filesystems中未加入mount nfs文件系统的条目
增加以下条目后，重新mount，解决。
#vi /etc/filesystems
/exp:
dev = /exp
vfs = nfs
nodename = 192.168.1.20
mount = true
options = rw,bg,hard,intr,proto=tcp,vers=3,rsize=65536,wsize=65536,timeo=600
account = false
#umount /oraexp
#mount /oraexp
建议大家以后遇到类似问题，先检查/etc/filesystems文件，这个问题都是由于大家都喜欢使用以下方式mount nfs导致。
mount -o rw,bg,hard,intr,proto=tcp,vers=3,rsize=65536,wsize=65536,timeo=600 192.168.1.20:/exp /exp
//相关metalink 文档如下：
ORA-19504 ORA-27054 Errors mounting NFS file system [ID 370513.1]
RMAN Backup Fails With RMAN-03009 ORA-19504 ORA-27054 NFS file system where the file is created or resides is not mounted with correct options [ID 1472448.1]
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options [ID 781349.1]
//另外设置10298的过程如下：
1) set the Event 10298 in the init file
event="10298 trace name context forever, level 32"
if you are using the spfile then the following can be done
SQL> alter system set event='10298 trace name context forever, level 32'scope= spfile ;
Once you set the above parameter restart the instance check as follows
SQL> select name, value from v$parameter where name = 'event';
NAME VALUE
---------- ------------------------------------------------------------
Event 10298 trace name context forever, level 32
1 row selected.
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