在oracle环境中使用NFS，在mount的时候需要修改一些选项，否则可能导致各种问题，比如ORA-27086和ORA-27054错误。不管你是将Oracle安装在NFS设备也好，是将datafile放置在NFS设备也好，是备份到NFS设备也好，如果出现相关的错误，则需要检查下是否mount的选项有问题。一般只要用hard方式来mount的，都不会有太多问题。

以下内容引自Metalink(Doc ID:359515.1)，适用于10.1.0.2以上版本，供参考：

RAC

In the table below

Binaries is the shared mount points where the Oracle Home and CRS_HOME is installed.

Datafiles includes Online Logs, Controlfile and Datafiles

Operating SystemMount options for BinariesMount options for Oracle DatafilesMount options for CRS Voting Disk and OCR

Sun Solaris *rw,bg,hard,nointr,rsize=32768,

wsize=32768,proto=tcp,

noac,vers=3,suidrw,bg,hard,nointr,rsize=32768,

wsize=32768,proto=tcp,noac,

forcedirectio, vers=3,suidrw,bg,hard,nointr,rsize=32768,

wsize=32768,proto=tcp,vers=3,

noac,forcedirectio

AIX (5L) **rw,bg,hard,nointr,rsize=32768,

wsize=32768,proto=tcp,vers=3,

timeo=600cio,rw,bg,hard,nointr,rsize=32768,

wsize=32768,proto=tcp,noac,

vers=3,timeo=600cio,rw,bg,hard,intr,rsize=32768,

wsize=32768,tcp,noac,

vers=3,timeo=600

HPUX 11.23 **** –rw,bg,vers=3,proto=tcp,noac,

hard,nointr,timeo=600,

rsize=32768,wsize=32768,suidrw,bg,vers=3,proto=tcp,noac,

forcedirectio,hard,nointr,timeo=600,

rsize=32768,wsize=32768,suidrw,bg,vers=3,proto=tcp,noac,

forcedirectio,hard,nointr,timeo=600

,rsize=32768,wsize=32768,suid

Linux x86

#rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp, vers=3,

timeo=600, actimeo=0rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,actimeo=0,

vers=3,timeo=600rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,noac,vers=3,

timeo=600

Linux x86-64 #rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,vers=3,

timeo=600, actimeo=0rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,actimeo=0,

vers=3,timeo=600rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,vers=3,

timeo=600,noac

Linux – Itaniumrw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,vers=3,

timeo=600, actimeo=0rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,actimeo=0,

vers=3,timeo=600rw,bg,hard,nointr,rsize=32768,

wsize=32768,tcp,noac,vers=3,

timeo=600

* NFS mount option “forcedirectio” is required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)

** AIX is only supported with NAS on AIX 5.3 TL04 and higher with Oracle 10.2.0.1 and later (NetApp)

*** NAS devices are only supported with HPUX 11.23 or higher ONLY

# These mount options are for Linux kernels 2.6 and above for older kernels please check Note 279393.1

Due to Unpublished bug 5856342, it is necessary to use the following init.ora parameter when using NAS

with all versions of RAC on Linux (x86 & X86-64 platforms) until 10.2.0.4. This bug is fixed and included in 10.2.0.4 patchset.

filesystemio_options = DIRECTIO

Single InstanceOperating SystemMount options for BinariesMount options for Oracle Datafiles

Sun Solaris *

(8, 9, 10)rw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

proto=tcp,suidrw,bg,hard,rsize=32768,

wsize=32768,vers=3,[forcedirectio or llock],

nointr,proto=tcp,suid

AIX (5L) **rw,bg,hard,rsize=32768,

wsize=32768,vers=3,intr,

timeo=600,proto=tcprw,bg,hard,rsize=32768,

wsize=32768,vers=3,cio,intr,

timeo=600,proto=tcp

HPUX 11.23 ****rw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,proto=tcp,suidrw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,proto=tcp,suid

Linux x86

#rw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcprw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcp,actime=0*

Linux x86-64 #rw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcprw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcp,actime=0*

Linux – Itaniumrw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcprw,bg,hard,rsize=32768,

wsize=32768,vers=3,nointr,

timeo=600,tcp

* actime=0 or noac can be used