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Oracle will write all the datafiles and such to your DATA directory. You actually have to create a backup in the +flash_recovery_area you have created. What sort of backup are you trying to create? What command are you using to create your backup? For instance, if you wanted to execute a Level 0 IMAGE COPY, you could issue the following command: backup ...


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I solved it by logging off from ASM and changing directory away from /dev/oracleasm/disks. Afterwards it worked ok.


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i've found the definitive answer from the oracle docs http://docs.oracle.com/cd/E11882_01/license.112/e47877/editions.htm#DBLIC109 in the Oracle Database Standard Edition and Oracle Real Application Clusters (Oracle RAC) section, it specifies "Oracle Automatic Storage Management is required for creating and managing all Oracle database file types. Raw ...


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No it is not, but it is much easier. For example you can store Oracle datafiles on Veritas VxCFS. There are other certified cluster filesystems, but none of them is for free. Also there was an option to not to use any filesystem. You could have "datafiles" on raw devices. But AFAIK this option is no more available. PS: ASM does not offer better ...



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