9.7. Administering ASM Disk Groups
Using ASM disk groups benefits you in a number of ways:
I/O performance is improved.
Availability is increased.
The ease with which you can add a disk to a disk group or add an entirely new disk group enables you to manage many more databases in the same amount of time.
Understanding the components of a disk group as well as correctly configuring a disk group is an important goal for a successful DBA.
In the following sections, we will delve more deeply into the details of the structure of a disk group. Also, we will review the different types of administrative tasks related to disk groups and show how disks are assigned to failure groups, how disk groups are mirrored, and how disk groups are created, dropped, ...