RMAN> backup current controlfile;
Starting backup at 13-MAR-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 13-MAR-13
channel ORA_DISK_1: finished piece 1 at 13-MAR-13
piece handle=/DMCDBS01/app/oracle/product/11.2.0/db_1/dbs/u7o4ecub_1_1 tag=TAG20130313T162443 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 13-MAR-13
Starting Control File and SPFILE Autobackup at 13-MAR-13
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of Control File and SPFILE Autobackup command on ORA_DISK_1 channel at 03/13/2013 16:24:53
ORA-19504: failed to create file "/rman/c-2574052798-20130313-02"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 3
处理：
经过查找是由于不正确的参数选项造成的进行如下处理
# mount -F nfs -o rw,bg,noac,rsize=32768,wsize=32768,hard,actimeo=0,nointr,vers=3,timeo=600 10.217.109.60:/rman /rman
经过备份验证正常。
也可以：
修改 /etc/vfstab 解决：
例：
192.168.1.3:/export/nfs1 - /orabak nfs 2 yes rw,bg,noac,rsize=32768,wsize=32768,hard,actimeo=0,nointr,vers=4,timeo=600