In ExaCC and probably on Exadata in OCI it is sometimes a bit complex to calculate how much space you need to add to the ASM, as you can only change the total space and the distribution.
When you just want to add 10TB (or GB) space to DATA diskgroup, you need to play a while or do an excel.
With the calculator below, you can now do it easily:
Edit any cell — usable, raw (×3), % of total, or the total row itself. Other values update accordingly.
| Disk group | Usable space | Raw space (×3) | % of total |
|---|---|---|---|
DATA |
TB | TB | % |
RECO |
TB | TB | % |
SPARSE |
TB | TB | % |
Total |
TB | TB | 100% |
When looking inside asmcmd, you see the “Raw space”. This is how much from disk space is used. The Usable space is what the users see and what you need to consider.