今天在虚拟机环境下做实验，在将rac环境修改为flashback on时，报出了ORA-27054错误，错误代码如下：
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
从错误描述可以看出，闪回目录是通过nfs文件系统来实现的，而系统挂载nfs时，采用了错误的参数选项，导致oracle报错。上网查资料，通过文档359515.1顺利解决问题。整理部分内容如下：
|
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required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)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
|
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
参照上文，修改mount参数如下：[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/local service iscsi restart #start_udev modprobe hangcheck-timer mount -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/
另外，在网上查到资料，还可以使用如下方式解决
1：设置事件10298 level 32
alter system set event=‘10298 trace name context forever,level 32‘ scope=spfile;
重新启动数据库后生效.
2：打补丁:5146667
我没有试验，有兴趣的朋友可以试试，
原文地址：http://blog.csdn.net/yidian815/article/details/34441183
