This is an illustration of a clustered Oracle ASM configuration
with Oracle Real Application Clusters (Oracle RAC) and a single-
instance Oracle Database. The illustration shows multiple Oracle
Database instances and multiple Oracle ASM instances. At the top
of the illustration, there are two Oracle RAC databases and one
single-instance Oracle Database. The first Oracle RAC database
has two instances as does the second Oracle RAC database. On the
right is a single-instance Oracle database. Below these are five
Oracle ASM instances, one for each database. The five Oracle ASM
instances are clustered Oracle ASM instances, that is, they
interoperate to serve all five of the Oracle Databases. All of
the databases share access to an Oracle ASM clustered pool of
storage that appears at the bottom of the diagram. The clustered
storage pool has two disk groups, disk group A and disk group B.
Disk group A has four disks and disk group B has two disks.