devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
~
在存储空间允许的情况下，调节tmpfs方法就是在fstab中增加size参数，直接指定大小。
[root@SimpleLinux ~]# mount /dev/shm
[root@SimpleLinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 48G 13G 33G 28% /
tmpfs 2.0G 0 2.0G 0% /dev/shm
再次执行脚本，依然报错，但是故障提示变化。
startup clone nomount;
}
executing Memory Script
sql statement: alter system set control_files = ''/u01/app/oradata/ORA11G/controlfile/o1_mf_9mnjwpko_.ctl'', ''/u01/app/fast_recovery_area/ORA11G/controlfile/o1_mf_9mnjwpw2_.ctl'' comment= ''Set by RMAN'' scope=spfile
Starting backup at 10-APR-14
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: =========================================
RMAN-03002: failure of Duplicate Db command at 04/10/2014 12:18:19
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 04/10/2014 12:18:19
ORA-17628: Oracle error 19505 returned by remote Oracle server
RMAN> **end-of-file**