Oracle数据库使用NBU备份到带库中，在做异机恢复时报错如下：
channel ch00: restoring control file
released channel: ch00
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 02/06/2013 15:25:24
ORA-19870: error reading backup piece /cntrl_34631_1_806669647
ORA-19507: failed to retrieve sequential file, handle="/cntrl_34631_1_806669647", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Failed to process backup file </cntrl_34631_1_806669647>
解决办法是在master server上创建文件：/usr/openv/netbackup/db/altnames/No.Restrictions