API · /raid-api

RAID Calculator API

healthy 3,955 Subscribers

RAID storage-array maths as an API, computed locally and deterministically. The capacity endpoint computes the usable and raw capacity, the storage efficiency and the fault tolerance of a RAID level — RAID 0 stripes for n×disk with no redundancy, RAID 1 mirrors to one disk and tolerates n−1 failures, RAID 5 gives (n−1)×disk with one-disk tolerance, RAID 6 gives (n−2)×disk with two-disk tolerance, and RAID 10 gives (n/2)×disk — and reports the minimum disks each level needs. The compare endpoint lays the levels side by side for the same disks and disk size so you can weigh capacity against redundancy. The rebuild endpoint estimates how long it takes to rebuild a single disk at a given rebuild speed, the window during which a second failure would lose data in RAID 5/6. Everything is computed locally and deterministically, so it is instant and private. Ideal for storage, NAS, server and IT-admin app developers, capacity-planning and procurement tools, and homelab calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is RAID array sizing; for data-transfer time use a transfer API.

#raid #storage #nas #capacity-planning #sysadmin #developer-tools

api.oanor.com/raid-api

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Machine-readable spec so AI agents can integrate this API.

/api/raid-api/openapi.json

/api/raid-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 89 ms; Server probes · 24h
Subscribers: 3,955; active
Total calls: 32; last 7 days

Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

2,000 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
Usable + raw capacity for RAID 0/1/5/6/10
Storage efficiency percentage
2 requests/sec

Starter

€6.00 /month

15,000 calls / month
5 requests / second
Hard cap (429 above quota, no overage)
All RAID levels incl. RAID 50/60
Fault-tolerance + drive-loss analysis
Mixed drive-size handling
5 requests/sec

Pro

€18.00 /month

80,000 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
Bulk array comparison in one call
Rebuild-time + parity overhead estimates
Cost-per-usable-TB output
15 requests/sec

Mega

€59.00 /month

400,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
High-volume capacity-planning automation
Full RAID matrix + nested-array maths
Priority support + 99.9% SLA
40 requests/sec

Built by

PremiumApi

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Humidor API

Cigar-humidor maths as an API, computed locally and deterministically — the numbers behind storing cigars right, so you buy the correct humidor and keep it at the perfect humidity. The capacity endpoint works out how many cigars an interior holds: interior volume × a packing efficiency ÷ one cigar's volume, where a cigar is a cylinder of its ring gauge (in 64ths of an inch) and length — a 9 × 7 × 3 inch interior holds about 40 Toros (ring 50, 6 inch) at a realistic 0.62 packing, leaving room for air and a humidification device. The media endpoint sizes the humidification: about one 60 g two-way pack per 25 cigars, replaced roughly every two months, so a 40-cigar humidor wants two packs. The seasoning endpoint covers a brand-new humidor — its Spanish cedar must absorb moisture for about two weeks at 84 % RH (one seasoning pack per 25-cigar capacity, or the distilled-water wipe-down) before any cigars go in, or the dry wood will rob them. Everything is computed locally and deterministically, so it is instant and private. Ideal for cigar-shop and tobacconist apps, humidor-maker product pages, cigar-aficionado and collection-tracker sites, and buying guides. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. For room humidity or dew point use a psychrometric API.

api.oanor.com/humidor-api

Grain Bin API

Grain-bin storage maths as an API, computed locally and deterministically — the bushel and weight numbers a farmer or elevator sizes storage by. The bushels endpoint measures a round bin: floor area × grain depth gives the cubic feet, and a cubic foot holds about 0.8036 bushels, so an 18-foot bin filled 20 feet level holds roughly 4,090 bushels — and grain heaped to a peak adds a cone of (1/3) × floor area × peak height, so a 4-foot peak adds about 270 more. The weight endpoint converts bushels to weight by the crop’s standard test weight — corn and sorghum at 56 pounds a bushel, wheat and soybeans 60, oats 32, barley 48 — so those 4,090 bushels of corn weigh 229,040 pounds, about 114.5 US tons or 104 tonnes; pass a measured test weight for light or heavy grain. Everything is computed locally and deterministically, so it is instant and private. Ideal for agriculture, grain-elevator, farm-management and ag-tech app developers, storage-capacity and inventory tools, and harvest software. Pure local computation — no key, no third-party service, instant. US units (feet, bushels, pounds). Live, nothing stored. 2 compute endpoints.

api.oanor.com/grainbin-api

Queueing Theory API

Queueing-theory maths as an API, computed locally and deterministically. The littles-law endpoint applies Little's law, L = λ·W — the average number in a system equals the arrival rate times the average time in the system — and solves for whichever of the three you leave out; it holds for any stable system, from a checkout line to a request pipeline. The mm1 endpoint gives the full steady-state metrics of a single-server M/M/1 queue from the arrival rate λ and the service rate μ: the utilization ρ = λ/μ, the average number in the system and in the queue, the average time in the system and waiting, and the probability the system is empty — and it flags an unstable queue when ρ ≥ 1. The mmc endpoint extends this to a multi-server M/M/c queue with the Erlang-C waiting probability, returning the offered load in erlangs, the per-server utilization, the chance an arrival has to wait, and the same length and time metrics. Rates must share a time unit, and the times come out in that unit. Everything is computed locally and deterministically, so it is instant and private. Ideal for capacity-planning and operations tools, call-centre and staffing apps, server and throughput sizing, and operations-research education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is queueing theory; for descriptive statistics on a list of numbers use a statistics API.

api.oanor.com/queue-api

chmod API

A Unix file-permission calculator as an API. Convert a symbolic permission string (rwxr-xr-x) to its octal mode (755) and back, and explain any mode in plain English with a per-class breakdown (owner / group / others, each read / write / execute). Full support for the special bits — setuid (4), setgid (2) and the sticky bit (1) — so 4755 ↔ rwsr-xr-x and 1777 ↔ rwxrwxrwt are handled correctly, including the capital S/T forms. Perfect for Dockerfiles and CI scripts, deployment and provisioning tooling, teaching, and any time you need to double-check a chmod value. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from anything that touches real files or networking.

api.oanor.com/chmod-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for RAID Calculator API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call RAID Calculator API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for RAID Calculator API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does RAID Calculator API cost?

RAID Calculator API has a free tier with 100 calls / month. Paid plans start at €6.00 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is RAID Calculator API GDPR-compliant?

All requests to RAID Calculator API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

RAID 3

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/capacity

RAID capacity

Playground

Parameters

Custom headers

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GET /v1/compare

Compare RAID levels

Playground

Parameters

Custom headers

Language: Client:

GET /v1/rebuild

Rebuild time

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Spec

Playground

Custom headers

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Code snippets

curl https://api.oanor.com/raid-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/raid-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/raid-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/raid-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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RAID Calculator API

API health

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Related APIs

Humidor API

Grain Bin API

Queueing Theory API

chmod API

Frequently asked questions

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