data: add Exos X16 12TB/14TB; refresh export (142 drives, 15 with AFR)
Re-exported drives.json/csv from the live API after the catalog import. Softened README counts (140+) so they don't drift on future catalog changes. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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README.md
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README.md
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# NAS drive dataset
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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).
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An open dataset of NAS hard drives: full specs, **CMR vs SMR**, and real-world **Backblaze annualized failure rates (AFR)**. 140+ drives, with a measured failure rate for the models Backblaze tracks. 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).
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Maintained at [nasdisks.com](https://www.nasdisks.com), where the same data drives a live price comparison across seven Amazon regions.
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@ -8,9 +8,9 @@ Maintained at [nasdisks.com](https://www.nasdisks.com), where the same data driv
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| File | Rows | What it is |
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|------|------|------------|
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| [`data/drives.csv`](data/drives.csv) | 138 | The headline file: one flat row per drive, specs joined to failure rate. |
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| [`data/drives.json`](data/drives.json) | 138 | The same rows as JSON (mirror of the live API). |
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| [`data/cmr-reference.csv`](data/cmr-reference.csv) | 138 | Source of truth for specs + CMR/SMR classification, with a per-row `confidence` flag. |
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| [`data/drives.csv`](data/drives.csv) | 140+ | The headline file: one flat row per drive, specs joined to failure rate. |
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| [`data/drives.json`](data/drives.json) | 140+ | The same rows as JSON (mirror of the live API). |
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| [`data/cmr-reference.csv`](data/cmr-reference.csv) | 140+ | Source of truth for specs + CMR/SMR classification, with a per-row `confidence` flag. |
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| [`data/backblaze-afr.csv`](data/backblaze-afr.csv) | 36 | Full-year 2025 Backblaze failure rates per model (the models Backblaze runs at scale). |
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| [`data/series-reliability.csv`](data/series-reliability.csv) | - | Manufacturer series specs (warranty, rated workload, MTBF) used as context where Backblaze has no data. |
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## Methodology
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- **CMR vs SMR** is classified from manufacturer datasheets and model-number decoding. SMR drives shingle their tracks, which cripples random-write and RAID-rebuild performance, so the distinction is the single most important spec for a NAS - and manufacturers do not always advertise it. The `confidence` column in `cmr-reference.csv` flags how certain each call is.
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- **Failure rates** are computed from Backblaze's raw 2025 quarterly Drive Stats, aggregated to a full-year annualized rate and validated against Backblaze's own published fleet figure (~1.36% for 2025). Only the 13 catalog models that exactly match a Backblaze-tracked model carry an `afr_pct`; the rest are left null rather than guessed.
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- **Failure rates** are computed from Backblaze's raw 2025 quarterly Drive Stats, aggregated to a full-year annualized rate and validated against Backblaze's own published fleet figure (~1.36% for 2025). Only the catalog models that exactly match a Backblaze-tracked model carry an `afr_pct`; the rest are left null rather than guessed.
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- **`series-reliability.csv`** gives manufacturer-rated context (warranty years, workload TB/year, MTBF) for lines Backblaze doesn't run, so you have *something* to reason about beyond a blank cell.
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## Licence & attribution
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@ -36,11 +36,13 @@ ST16000NM002G,Seagate,"Exos X16",16,7200,256,SAS,3.5,cmr,Enterprise,1,,,,,
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ST16000NT001,Seagate,"IronWolf Pro",16,7200,256,SATA,3.5,cmr,NAS-Pro,1,,,,,
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ST16000VE002,Seagate,"SkyHawk AI",16,7200,256,SATA,3.5,cmr,Surveillance,1,,,,,
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HDWG51E,Toshiba,N300,16,7200,512,SATA,3.5,cmr,NAS,1,,,,,
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HDWG51G,Toshiba,N300,16,7200,512,SATA,3.5,cmr,NAS,1,,,,,
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MG08ACA16Tx,Toshiba,MG08,16,7200,512,SATA,3.5,cmr,Enterprise,1,0.96,45652,16812090,441,"Backblaze 2025 (merged MG08ACA16TA + MG08ACA16TE)"
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MG09ACA16TE,Toshiba,MG09,16,7200,512,SATA,3.5,cmr,Enterprise,1,1.73,348,63327,3,"Backblaze 2025"
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WD161KFGX,WD,"Red Pro",16,7200,512,SATA,3.5,cmr,NAS-Pro,1,,,,,
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WD161KRYZ,WD,Gold,16,7200,512,SATA,3.5,cmr,Enterprise,1,,,,,
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WUH721816ALE6Lx,WD,"Ultrastar DC HC550",16,7200,512,SATA,3.5,cmr,Enterprise,1,0.8,29629,10764307,235,"Backblaze 2025 (merged WUH721816ALE6L0 + WUH721816ALE6L4)"
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ST14000NM001G,Seagate,"Exos X16",14,7200,256,SATA,3.5,cmr,Enterprise,1,1.35,10464,3849616,142,"Backblaze 2025"
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ST14000NT001,Seagate,"IronWolf Pro",14,7200,256,SATA,3.5,cmr,NAS-Pro,1,,,,,
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HDWG31G,Toshiba,N300,14,7200,256,SATA,3.5,cmr,NAS,1,,,,,
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HDWR31G,Toshiba,X300,14,7200,256,SATA,3.5,cmr,Desktop,1,,,,,
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@ -52,6 +54,7 @@ WD142KFGX,WD,"Red Pro",14,7200,512,SATA,3.5,cmr,NAS-Pro,1,,,,,
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WD142KRYZ,WD,Gold,14,7200,512,SATA,3.5,cmr,Enterprise,1,,,,,
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WUH721414AL5204,WD,"Ultrastar DC HC530",14,7200,512,SAS,3.5,cmr,Enterprise,1,,,,,
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WUH721414ALE6L4,WD,"Ultrastar DC HC530",14,7200,512,SATA,3.5,cmr,Enterprise,1,0.81,8630,3141290,70,"Backblaze 2025"
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ST12000NM001G,Seagate,"Exos X16",12,7200,256,SATA,3.5,cmr,Enterprise,1,0.96,13147,4817914,127,"Backblaze 2025"
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ST12000NT001,Seagate,"IronWolf Pro",12,7200,256,SATA,3.5,cmr,NAS-Pro,1,,,,,
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ST12000VE001,Seagate,"SkyHawk AI",12,7200,256,SATA,3.5,cmr,Surveillance,1,,,,,
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ST12000VN0008,Seagate,IronWolf,12,7200,256,SATA,3.5,cmr,NAS,1,,,,,
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@ -127,6 +130,7 @@ ST2000DM008,Seagate,BarraCuda,2,7200,256,SATA,3.5,smr,Desktop,1,,,,,
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ST2000NT001,Seagate,"IronWolf Pro",2,7200,256,SATA,3.5,cmr,NAS-Pro,1,,,,,
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ST2000VN003,Seagate,IronWolf,2,5400,256,SATA,3.5,cmr,NAS,1,,,,,
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ST2000VX017,Seagate,SkyHawk,2,5400,256,SATA,3.5,cmr,Surveillance,1,,,,,
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WD2002FFSX,WD,"Red Pro",2,7200,64,SATA,3.5,cmr,NAS-Pro,1,,,,,
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WD2005FBYZ,WD,Gold,2,7200,128,SATA,3.5,cmr,Enterprise,1,,,,,
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WD2005FFBX,WD,"Red Pro",2,7200,256,SATA,3.5,cmr,NAS-Pro,1,,,,,
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WD20EFAX,WD,Red,2,5400,256,SATA,3.5,smr,NAS,1,,,,,
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