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
- Binaries is the shared mount points where the Oracle Home and CRS_HOME is installed.
- Datafiles includes Online Logs, Controlfile and Datafiles
Operating System | Mount options for Binaries | Mount options for Oracle Datafiles | Mount options for CRS Voting Disk and OCR |
| Sun Solaris * | rw,bg,hard,nointr,rsize=32768, | rw,bg,hard,nointr,rsize=32768, wsize=32768,proto=tcp,noac, forcedirectio, vers=3,suid | rw,bg,hard,nointr,rsize=32768, wsize=32768,proto=tcp,vers=3, noac,forcedirectio |
| AIX (5L) ** | rw,bg,hard,nointr,rsize=32768, | cio,rw,bg,hard,nointr,rsize=32768, | cio,rw,bg,hard,intr,rsize=32768, |
| HPUX 11.23 **** – | rw,bg,vers=3,proto=tcp,noac, hard,nointr,timeo=600, rsize=32768,wsize=32768,suid | rw,bg,vers=3,proto=tcp,noac, forcedirectio,hard,nointr,timeo=600, rsize=32768,wsize=32768,suid | rw,bg,vers=3,proto=tcp,noac, forcedirectio,hard,nointr,timeo=600 ,rsize=32768,wsize=32768,suid |
| Linux x86 # | rw,bg,hard,nointr,rsize=32768, | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,bg,hard,nointr,rsize=32768, |
| Linux x86-64 # | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,vers=3, timeo=600, actimeo=0 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,vers=3, timeo=600,noac |
| Linux – Itanium | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,vers=3, timeo=600, actimeo=0 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,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required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)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
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 Instance
Operating System | Mount options for Binaries | Mount options for Oracle Datafiles |
| Sun Solaris * (8, 9, 10) | rw,bg,hard,rsize=32768, | rw,bg,hard,rsize=32768, wsize=32768,vers=3,[forcedirectio or llock], nointr,proto=tcp,suid |
| AIX (5L) ** | rw,bg,hard,rsize=32768, | rw,bg,hard,rsize=32768, |
| HPUX 11.23 **** | rw,bg,hard,rsize=32768, wsize=32768,vers=3,nointr, timeo=600,proto=tcp,suid | rw,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,tcp | rw,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,tcp | rw,bg,hard,rsize=32768, wsize=32768,vers=3,nointr, timeo=600,tcp,actime=0* |
| Linux – Itanium | rw,bg,hard,rsize=32768, wsize=32768,vers=3,nointr, timeo=600,tcp | rw,bg,hard,rsize=32768, wsize=32768,vers=3,nointr, timeo=600,tcp |
* actime=0 or noac can be used