Automatic Storage Management

Automatic Storage Management—This option enables you to place your data files
in Oracle Automatic Storage Management (Oracle ASM) disk groups. If you
choose Oracle ASM, then Oracle Database automatically manages database file
placement and naming. For environments with a large number of disks, this
option simplifies database administration and maximizes performance. Oracle
ASM performs software striping and mirroring at the file level for maximum
storage flexibility, performance, and availability.
Oracle ASM uses an Oracle ASM instance, which is distinct from the database
instance, to configure and manage disk groups. A single Oracle ASM instance can
provide storage for multiple databases on the same server.
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