To open the Storage page
Click ASM | Storage.
ASM Utilization Grid
This grid shows a breakdown of storage within the ASM diskgroups. Allocation totals are categorized according to diskgroup, database, file type, and into primary or mirror allocations.
ASM Utilization Chart
This chart shows a breakdown of storage within the ASM diskgroups. For each diskgroup, the chart shows the amount of space allocated to the major types of database files:
For diskgroups that use a redundancy scheme, the chart shows the amount of remaining space required for mirroring purposes.
The remaining allocation represents the space within the diskgroup that can be used for further allocations.
Tip: For more information on ASM see the Oracle Database Help Center.