CHAPTER 7ASM Files, Aliases, and Templates
When an ASM diskgroup is created, a hierarchical filesystem structure is created. This hierarchical layout is very similar to the Unix or Windows filesystem hierarchy. ASM files, stored within this filesystem structure, are the objects that RDBMS instances access. They come in the form of datafiles, controlfiles, Spfiles, and redo log files, and several other file types. The RDBMS treats ASM-based database files just like standard filesystem files.
ASM Filenames
When you create a database file using the create tablespace, add datafile, or add logfile commands, or even an archive logfile creation, ASM explicitly creates the ASM file in the diskgroup specified, as in the following example:
SQL> CREATE ...
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