9.4.1 Sizing Steps for New Sparse Disk Groups
These steps describe how to determine the space needed for sparse disk groups and how to allocate that space.
The maximum physical size that can be allocated to sparse grid disks from a single cell disk is 4 TB.
The maximum virtual size that can be allocated per sparse grid disk is 100 TB. However, to avoid additional performance impact Oracle does not recommend creating large virtual sizes unless it is truly required.
Remember also that a sparse disk group can house non-sparse database files, in which case the physical storage utilization matches the virtual file size.
Parent topic: Sparse Disk Sizing and Allocation Methodology