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docs(readme): clearer can/must/can't licence section; drop Backblaze hyperlink

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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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nettrust 2026-06-16 00:48:49 +02:00
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README.md
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@ -53,17 +53,27 @@ curl -s https://www.nasdisks.com/data/drives.csv
## Licence & attribution ## Licence & attribution
This dataset has two parts under two different sets of terms. **Short version: the specs are fully open; the failure rates are free to use but must credit Backblaze and can't be resold on their own.**
**Drive specs + CMR/SMR classification** - everything except the failure-rate fields - is our own work, released under [Creative Commons Attribution 4.0 International (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/) (full legal code in [`LICENSE`](LICENSE)). Copy, remix and redistribute it, even commercially, as long as you credit: ### 1. Drive specs + CMR/SMR classification - CC BY 4.0
``` Our own work (every field *except* the failure-rate ones). Licensed under [Creative Commons Attribution 4.0 (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/); full text in [`LICENSE`](LICENSE).
Drive specs & CMR/SMR by nasdisks.com, CC BY 4.0
```
A link back to https://www.nasdisks.com satisfies it. - **You can:** copy, modify, redistribute and build on it - including commercially.
- **You must:** credit the source, e.g.
```
Drive specs & CMR/SMR by nasdisks.com, CC BY 4.0
```
A link back to https://www.nasdisks.com is enough.
**Failure-rate fields** - `afr_pct`, `reliability_drive_count`, `reliability_drive_days`, `reliability_failures` (in `drives.csv`/`drives.json`) and the whole of `backblaze-afr.csv` - come from [Backblaze Drive Stats](https://www.backblaze.com/cloud-storage/resources/hard-drive-test-data) and stay under **Backblaze's terms, not CC BY 4.0**: cite Backblaze as the source, and you may not sell the data itself (selling derivative works is fine). Backblaze does not endorse this project. See [`NOTICE`](NOTICE). ### 2. Failure-rate data - Backblaze's terms (NOT CC BY 4.0)
The fields `afr_pct`, `reliability_drive_count`, `reliability_drive_days`, `reliability_failures` (in `drives.csv` / `drives.json`) and all of `backblaze-afr.csv` come from Backblaze Drive Stats.
- **You can:** use it for free, and build (and even sell) derivative works from it.
- **You must:** credit Backblaze as the source.
- **You can't:** sell the raw data itself.
- Backblaze does not endorse this project. Details in [`NOTICE`](NOTICE).
## Updates ## Updates