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Easy Oracle Automation
Chapter 5 -
Automatic Storage Management

Guru Conversation for the Senior DBA

Congratulations, now there are 8 disks of 10 Giga bytes each. These are free devices available for use by the ASM setup.

The DBCA can be used for these files in the new database or add them using SQL*Plus commands.

FAILGROUP fgcontrol01 DISK ‘/dev/raw/raw1’,
FAILGROUP fgcontrol02 DISK ‘/dev/raw/raw2’ ;

These files will show up in the init.ora file of the ASM instance as ASM_DISKSTRING='/dev/raw/raw*'.


This chapter explored the Automatic Storage Management (ASM) features of Oracle Database 10g. The salient points are as follows.

  • Automatic Storage Mechanism (ASM) will create and manage the underlying files for database structures.

  • For the ASM architecture, Oracle Database 10g utilizes a separate smaller database instances installed in a separate oracle home, created during database set up.

  • ASM instance manages the metadata that is needed to make ASM files available to regular database instances.

  • ASM instance and database instances have access to a common set of disks called disk groups.

  • ASM instance is expected to always be up and running on the host.

The above text is an excerpt from:

Easy Oracle Automation
Oracle10g Automatic Storage, Memory and Diagnostic Features

ISBN 0-9745993-6-0

by Dr. Arun Kumar R.

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