From cff718086e15c02e07eab46a4bbabc76b0ecf2c3 Mon Sep 17 00:00:00 2001 From: nettrust Date: Tue, 16 Jun 2026 00:48:49 +0200 Subject: [PATCH] docs(readme): clearer can/must/can't licence section; drop Backblaze hyperlink Co-Authored-By: Claude Opus 4.8 --- README.md | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/README.md b/README.md index fa95fec..0a22149 100644 --- a/README.md +++ b/README.md @@ -53,17 +53,27 @@ curl -s https://www.nasdisks.com/data/drives.csv ## 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 -``` -Drive specs & CMR/SMR by nasdisks.com, 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). -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