Rman backup Times "ora-19504:failed to create File" and "ora-27038:created file already exists"

Rman>2>3'/dbbackup/db_%t'4 >5>}

Report the following error:

released channel:ch00 RMAN-00571: ===========================================================RMAN-00569: =============== ERROR MESSAGE, STACK follows ===============RMAN-00571: ===========================================================RMAN-03009: Failure of backup command on ch00 channel at ,/ One/ -  -: +: theORA-19504: Failed to create file"/dbbackup/db_20150811"ORA-27038: Created file already exists Additional information:1RMAN>

The reason is that the control files and parameter files need to generate a separate backup set, cannot share a backup set with the database, and specify a single file name when specifying a backup set to the data file, so the file has been reported as an error. The workaround is to add a%u in format, which will automatically generate a different and unique file name.

The control file cannot coexist with the data file in a backup set because the block size of the two is different, see ref2 for a passage.

 note:if the control File block size  is  not equal to the block size for  data file 1
    , then the control file cannot is written into the same backup set  as  the data file. RMAN writes the control file into a backup set  by itself if  The block size is  different. The V$controlfile. Block_size column indicates the control file block SIZE, whereas the Db_block_size initialization parameter indicates the Block size of data file 1   

Select  from v$controlfile;name                                                          ----------------------------------------------------------------------/u01/app/oracle/oradata/dbt/ Control01.ctl                         16384 /u01/app/oracle/oradata/dbt/control02.ctl                         16384SQL> Show Parameter Db_block_sizename                                 TYPE        ----------------------------------------------------------------------------- db_block_size                        integer      8192 SQL>

Rman backup Times "ora-19504:failed to create File" and "ora-27038:created file already exists"