Calculateur de RAID Usable Capacity
Estimate usable RAID storage after parity drives.
Formula and method
This calculator computes Usable capacity, Raw capacity directly in your browser without sending data to an external server.
Mathematical formula
- Usable capacity:
parity>=drives ? NaN : (drives-parity) × capacity - Raw capacity:
parity>=drives ? NaN : drives × capacity
Variables and parameters
- Drive count (drives): default value 6.
- Drive size (capacity): default value 12 TB.
- Parity drives (parity): default value 2.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does RAID Usable Capacity Calculator use?
RAID Usable Capacity Calculator evaluates outputs such as <strong>Usable capacity, Raw capacity</strong> based on inputs including Drive count, Drive size, Parity drives. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into RAID Usable Capacity Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in RAID Usable Capacity Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is RAID Usable Capacity Calculator free to use?
Yes. RAID Usable Capacity Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does RAID Usable Capacity Calculator store or upload my data?
No. RAID Usable Capacity Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is RAID Usable Capacity Calculator?
RAID Usable Capacity Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed RAID Usable Capacity Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of RAID Usable Capacity Calculator to your own blog post or page.