1.16 ASM_DISKGROUPS
ASM_DISKGROUPS
specifies a list of disk group names that an Oracle ASM instance mounts at startup when the ALTER DISKGROUP ALL MOUNT
statement is issued.
Property | Description |
---|---|
Parameter type |
String |
Syntax |
|
Default value |
There is no default value. |
Modifiable |
|
Modifiable in a PDB |
No |
Range of values |
Comma-separated list of strings, up to 30 characters |
Basic |
No |
Oracle RAC |
Multiple instances can have different values. |
Note:
This parameter may only be specified in an Oracle Automatic Storage Management (Oracle ASM) instance.
The Oracle ASM instance startup process executes ALTER DISKGROUP ALL MOUNT
unless the NOMOUNT
startup option is specified.
The ASM_DISKGROUPS
parameter is dynamic. If you are using a server parameter file (SPFILE), then you do not have to manually alter the value of ASM_DISKGROUPS
in most situations. Oracle ASM automatically adds a disk group to the parameter when the disk group is successfully created or mounted. Oracle ASM also automatically removes a disk group from the parameter when the disk group is dropped. However, the SPFILE is not updated on a manual dismount.
Issuing the ALTER DISKGROUP...ALL MOUNT
or ALTER DISKGROUP...ALL DISMOUNT
command does not affect the value of this parameter.
Supporting Up to 511 Disk Groups for an Oracle ASM Instance
In Oracle Database 12c Release 1 or later, Oracle ASM configurations support up to 511 disk groups. Oracle ASM configurations with Oracle Database releases before 12c Release 1 can only support up to 63 disk groups.
See Also:
Oracle Automatic Storage Management Administrator's Guide for more information about and examples of using this parameter