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OMF, ASM, and case sensitivity

in Database Administration (MOSC)

Oracle 12.1.0.2 SE2 on Oracle Linux 6,

Stand-alone ASM 12.1.0.2 - no RAC, no clustering of any kind.

This is not a problem, just a curiosity I noticed.

I just added a second data file to my UNDO tablespace, utilizing OMF naming.

alter tablespace UNDOTBS1 add datafile '+DATA' size 5G AUTOEXTEND ON NEXT 5G MAXSIZE 30G;

Then, just double-checking, looking at it in SQL Dev:
The newly added file is listed with all uppercase for the path, while the original is lower-case.  Thinking that was odd, I checked it at the command line, asmcmd.  There is no +DATA/DWPRD/DATAFILE directory.  Both files are in +DATA/dwprd/datafile.:

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