From 6c361c1dfc2f2a69a3948b502c8e4afa3204b44b Mon Sep 17 00:00:00 2001 From: nettrust Date: Tue, 16 Jun 2026 00:26:07 +0200 Subject: [PATCH] Scope licensing: CC BY 4.0 for our specs/CMR-SMR; Backblaze AFR under Backblaze terms Backblaze Drive Stats forbids selling the data itself, which CC BY 4.0 permits, so the failure-rate fields can't be CC BY 4.0. README now splits the licence and a NOTICE documents the Backblaze-sourced fields (cite Backblaze; no resale of the data; no endorsement). drives.json/csv re-exported from the corrected live API. Co-Authored-By: Claude Opus 4.8 --- NOTICE | 23 +++++++++++++++++++++++ README.md | 12 +++++++----- data/drives.json | 2 +- 3 files changed, 31 insertions(+), 6 deletions(-) create mode 100644 NOTICE diff --git a/NOTICE b/NOTICE new file mode 100644 index 0000000..b43ae9b --- /dev/null +++ b/NOTICE @@ -0,0 +1,23 @@ +NOTICE - third-party data + +This repository combines two sources under two different sets of terms. + +1. Drive specifications and CMR/SMR classification + (c) nasdisks.com - https://www.nasdisks.com + Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0). + See LICENSE. + +2. Failure-rate data + Fields: afr_pct, reliability_drive_count, reliability_drive_days, + reliability_failures (in data/drives.csv and data/drives.json), and the + whole of data/backblaze-afr.csv. + Source: Backblaze Drive Stats + https://www.backblaze.com/cloud-storage/resources/hard-drive-test-data + + These figures are derived from Backblaze's published Drive Stats data and + remain subject to Backblaze's terms, NOT CC BY 4.0: + - cite Backblaze as the source; + - you may not sell the data itself (selling derivative works is allowed); + - you are solely responsible for how you use the data. + + Backblaze does not endorse this project. diff --git a/README.md b/README.md index 2ad7d6e..fa95fec 100644 --- a/README.md +++ b/README.md @@ -1,8 +1,8 @@ # NAS drive dataset -An open dataset of NAS hard drives: full specs, **CMR vs SMR**, and real-world **Backblaze annualized failure rates (AFR)**. 138 drives, 13 with a measured failure rate. Free for any use - including commercially - under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), provided you credit the source. +An open dataset of NAS hard drives: full specs, **CMR vs SMR**, and real-world **Backblaze annualized failure rates (AFR)**. 138 drives, 13 with a measured failure rate. Our drive specs and CMR/SMR data are free to use - including commercially - under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) with credit; the Backblaze failure-rate fields stay under [Backblaze's own terms](#licence--attribution) (cite Backblaze; don't sell the data itself). -Maintained at [nasdisks.com](https://www.nasdisks.com), where the same data drives a live price comparison across seven Amazon regions. This repo is the raw data on its own, with no strings beyond attribution. +Maintained at [nasdisks.com](https://www.nasdisks.com), where the same data drives a live price comparison across seven Amazon regions. ## What's inside @@ -53,16 +53,18 @@ curl -s https://www.nasdisks.com/data/drives.csv ## Licence & attribution -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). +This dataset has two parts under two different sets of terms. -You may copy, remix and redistribute the data, even commercially, as long as you credit the source. The required attribution: +**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: ``` -NAS drive dataset by nasdisks.com, CC BY 4.0 +Drive specs & CMR/SMR by nasdisks.com, CC BY 4.0 ``` A link back to https://www.nasdisks.com satisfies it. +**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). + ## Updates The dataset is refreshed as the catalogue and Backblaze data change. The live endpoints above always reflect the current state; this repo is re-exported periodically. diff --git a/data/drives.json b/data/drives.json index 050aa7f..c74f15a 100644 --- a/data/drives.json +++ b/data/drives.json @@ -1 +1 @@ -{"source":"nasdisks.com","url":"https:\/\/www.nasdisks.com\/data","license":"CC BY 4.0","license_url":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","attribution":"NAS drive dataset by nasdisks.com, CC BY 4.0","count":138,"drives":[{"model":"WUH722626ALE6L4","brand":"WD","line":"Ultrastar DC HC590","capacity_tb":26,"rpm":7200,"cache_mb":512,"interface":"SATA","form_factor":"3.5","recording_tech":"cmr","drive_class":"Enterprise","in_production":true,"afr_pct":0.4,"reliability_drive_count":1200,"reliability_drive_days":91690,"reliability_failures":1,"reliability_source":"Backblaze 2025"},{"model":"ST24000NM002H","brand":"Seagate","line":"Exos 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