ASM_DISKGROUPS

Property	Description
Parameter type	String
Syntax	ASM_DISKGROUPS = diskgroup [, diskgroup ] ...
Default value	There is no default value.
Modifiable	ALTER SYSTEM
Range of values	Comma-separated list of strings, of up to 30 characters
Real Application Clusters	Multiple instances can have different values.

Note:

This parameter may only be specified in an Automatic Storage Management instance.

ASM_DISKGROUPS specifies a list of names of disk groups to be mounted by an Automatic Storage Management instance at instance startup or when an ALTER DISKGROUP ALL MOUNT statement is issued.

Automatic Storage Management (ASM) automatically adds a disk group to this parameter when the disk group is successfully created or mounted, and automatically removes a disk group from this parameter when the disk group is dropped or dismounted.

Issuing the ALTER DISKGROUP...ALL MOUNT or ALTER DISKGROUP...ALL DISMOUNT command does not affect the value of this parameter.

Note:

1.Query for the current value of the parameter

select name, value, isdefault, isses_modifiable, issys_modifiable,

isinstance_modifiable, isdeprecated, description

from v$parameter where upper(name) = 'ASM_DISKGROUPS';

NAME	VALUE	IS DEFAULT	ISSES_ MODIFIABLE	ISSYS_ MODIFIABLE	ISINSTANCE_ MODIFIABLE	IS DEPRECATED	DESCRIPTION
asm_diskgroups		TRUE	FALSE	IMMEDIATE	TRUE	FALSE	disk groups to mount automatically

Oracle initializatoin parameters