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
* 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required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)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
* actime=0 or noac can be used
按照上面所示，设置参数，结果仍然报错ora-27086,错误信息如下：
[oraten@yue ~]$ oerr ora 27086
27086, 00000, "unable to lock file - already in use"
// *Cause: the file is locked by another process, indicating that it is
// currently in use by a database instance.
// *Action: determine which database instance legitimately owns this file.
重启openfiler，成功解决问题，看来是之前mount不当导致在openfiler端有锁一直没有释放。
虽然oracle支持nfs，但使用nfs的情景比较少，多数使用nfs来备份数据库或者存放归档