ORA-27054 error handling

Today in the virtual machine environment experiment, when changing the rac environment to flashback on, reported a ORA-27054 error, the error code is as follows:

Errors in file /u01/app/oracle/admin/racdb/udump/racdb2_ora_25551.trc:ORA-38701: Flashback database log 2 seq 1 thread 2: "/u01/flashback/RACDB/flashback/o1_mf_%u_.flb"ORA-27054: NFS file system where the file is created or resides is not mounted with correct options 

From the error description, we can see that the flashback directory is implemented through the nfs file system. When the system mounts nfs, the incorrect parameter option is used, resulting in an oracle error. Check online information and solve the problem through document 359515.1. The contents are as follows: RACIn the table below
Binaries is the shared mount points where the Oracle Home and CRS_HOME is installed.
Datafiles shortdes 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, Wsize = 32768, proto = tcp, Noac, vers = 3, suid	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, Wsize = 32768, proto = tcp, vers = 3, Timeo = 600.	Cio, rw, bg, hard, nointr, rsize = 32768, Wsize = 32768, proto = tcp, noac, Vers = 3, timeo = 600	Cio, rw, bg, hard, intr, and 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, 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, 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.
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 onAIX 5.3 TL04And higher with Oracle 10.2.0.1 and later (NetApp)

* ** NAS devices are only supportedHPUX 11.23Or 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 pinned in 10.2.0.4 patchset.
Filesystemio_options = DIRECTIOSingle Instance

Operating System	Mount options for Binaries	Mount options for Oracle Datafiles
Sun Solaris * (8, 9, 10)	Rw, bg, hard, rsize = 32768, Wsize = 32768, vers = 3, nointr, Proto = tcp, suid	Rw, 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 = tcp	Rw, 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, 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

Modify the mount parameter as follows:

[root@node2 bdump]# cat /etc/rc.d/rc.local#!/bin/sh## This script will be executed *after* all the other init scripts.# You can put your own initialization stuff in here if you don't# want to do the full Sys V style init stuff.touch /var/lock/subsys/localservice iscsi restart#start_udevmodprobe hangcheck-timermount -t nfs -o rw,bg,noac,hard,nointr,rsize=32768,wsize=32768,nolock,proto=tcp,actimeo=0,vers=3,timeo=600 192.168.2.31:/u01/flashback/ /u01/flashback/

The problem is solved successfully!

In addition, you can use the following methods to find information on the Internet:

1: Set event 10298 level 32

Alter system set event = '2014 trace name context forever, level 32 'scope = spfile;

It takes effect after the database is restarted.

2: patching: 5146667

I have not tried it. If you are interested, try it.