Mount Disk Group

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This action builds and submits an ALTER DISKGROUP... MOUNT or ALTER DISKGROUP... DISMOUNT FORCE/NOFORCE statement. This lets you manually make disk groups available or unavailable to all database instances running on the same node.

Note: Before this object action is available you must have a direct connection to the ASM instance. For details, see Manage ASM Connection.

Platform Availability

• ORCL 10g ^

To Mount or Dismount a Disk Group

1. On a connected Oracle datasource, expand the Instance and ASM nodes.
2. Right-click the Disk Groups node and select Mount Disk Group from the context menu.
3. Use the following table as a guide to understanding and modifying settings in the dialog:

Step	Settings and tasks
Action options	All - Selected, an ALTER DISKGROUP ALL... statement is generated, letting you the mount or dismount operation to occur in all disk groups. Dismount - select this check box to make the disk group unavailable. Deselect this check box to have the disk group mounted. Force - only available with Dismount selected. If Force is selected, ASM will dismount the disks even if some files in the disk group are open. If deselected, a NOFORCE option is used. Restricted (available as of Oracle 11GR1) - When selected, a RESTRICTED clause is included in the generated ALTER DISKGROUP statement, mounting the disk in single-instance exclusive mode, making the disk group unusable by any ASM client. When unselected, a NORMAL clause is included in the generated ALTER DISKGROUP statement, mounting the disk group in shared mode, and other ASM instances and clients can access the disk group.
Dependencies	Lists referring and referenced objects potentially impacted by the change. For details, see Dependencies.
Preview	Displays the DDL that will execute the object action. For details, see Preview.

4. Click Execute. For information on the scheduling option, see Scheduling.