Perform the following procedures to monitor disk group usage:
To view Oracle ASM disk group usage and free space:
Access the Oracle Automatic Storage Management home page.
See "Accessing the Oracle Automatic Storage Management Home Page" for instructions.
Click the Disk Groups link to view the Disk Groups property page.
If the Oracle ASM Login page appears, then log in as the SYS user, connecting as SYSASM. Provide the SYS password that was set up for Oracle ASM when the Oracle ASM instance was created.
The Disk Group list page, similar to the page shown in Figure 7-5, displays all of the disk groups and their space usage information.
The Usable Free column displays the space in megabytes that is available in the disk group. The values in this column consider the redundancy level of the disk group, and exclude the space that the disk group reserves for restoring full redundancy for all files in the disk group after a disk failure.
For more information, see "Managing Capacity in Disk Groups" and "Views Containing Oracle ASM Disk Group Information"