Disk Groups

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When connected to an Oracle datasource with an ASM instance, the Navigator/Explorer’s Instance node shows ASM and ASM > Disk Groups subnodes. DBArtisan lets you connect to the ASM instance and provides basic object management for disk groups.

DBArtisan lets you use the default datasource connection or a dedicated connection to the ASM instance. When using the default datasource connection, you can open a Disk Group Editor but you can only view limited properties of the disk group. With a dedicated connection to the ASM instance, you can create and edit disk groups and make use of the disk group-specific object actions: Check Disk Group, Mount Disk Group, Rebalance Disk Group, and Undrop Disk. After connecting to the datasource, you are prompted to choose between the default datasource connection and a dedicated ASM instance connection on the first object action against a disk group. The connection type persists and you can also explicitly change the connection type using the Manage ASM Connection and Disconnect ASM Connection actions.

Note: The ASM and Disk Groups nodes are only visible if the datasource instance has an ASM instance.

Creating and editing

DBMS platform availability and object actions/operations supported

The table below lists the platforms on which this object type is available. It also lists the object actions available against objects of this type For an introduction to object actions and details on usage of specific actions, see Object actions.


Check Disk Group

Disconnect ASM Connection



Mount Disk Group

Rebalance Disk Group

Undrop Disk

Connection details

When registering an Oracle datasource:

  • As of Oracle 11gR1, you can specify the SYSASM privilege for the datasource connection. This provides full ASM administrative privilege for this connection.
  • Using the SYSDBA privilege, you can register the ASM instance directly using the Datasource Registration Wizard.