9.2.1.1 Sparse Grid Disks

A sparse grid disk has a virtual size attribute as well as physical size.

A sparse Oracle ASM disk group is composed of sparse grid disks.

The maximum physical size that can be allocated to sparse grid disks from a single cell disk is 4 TB. The maximum allowed virtual size is 100 TB.

You create sparse grid disks before creating a sparse Oracle ASM disk group. If you are deploying a new system or re-deploying an existing system, set aside some space from each cell disk for use by the disk group just as you would for any other disk group.

If you want to use an existing system without reimaging, see My Oracle Support note 1467056.1 for instructions on resizing existing grid disks.