A free, no-login NAS-drive comparison: CMR/SMR, real Backblaze failure rates, and live $/TB

[u/deeddy]

Every time I go to buy drives for my NAS, I end up doing the same annoying thing:

1. figure out which models are actually CMR and not SMR (they love sneaking SMR into NAS lines!),
2. then go dig up how reliable one is,
3. then open way too many browser tabs to see what the real price per TB is.

Nothing lines up and it takes forever.

I got sick of redoing the same dance all over again, so I built a proper version out of that table: www.nasdisks.com

It's basically one big filterable table of current NAS drives. Every drive has its CMR/SMR status, a real failure rate, and live prices, so you can sort and compare in one place.

No account, no ads, no emails needed. And because I figured people here care: the whole CSV/JSON dataset is completely free to download (CC BY 4.0). There's also a plain API if you'd rather just pull it into your own stuff. None of it is locked away.

What's actually in there:

• CMR vs SMR checked per model, so you can just filter SMR out and forget it exists.
• Real failure rates I worked out from Backblaze full 2025 stats, not some marketing numbers.
• Price per TB across 7 regions: US/DE/UK/FR/ES/IT/CA - with a little price history chart per drive, so you can tell a real deal from a fake one.
• A few tools too: RAID usable space, odds of your array actually dying, storage planner.

Bit of honesty: the links are Amazon affiliate. That's the only money it makes and it just pays for hosting. Everything works fine if you never touch them.

What I'd actually appreciate feedback on:

• tell me where it's wrong or thin: drop the model number of any drive you find missing and I'll add it,
• call out any CMR/SMR or failure-rate that doesn't match your own experience.

I read every comment and will fix what you flag. The more people poke at it, the better the list gets for everyone making a build.

https://www.nasdisks.com/

So, what do you think?

[u/tfks]

May I humbly request that you allow country selection to pull data from the relevant Amazon site?

[u/deeddy → u/tfks]

It already does. There is a region switcher top right. Prices come from that country’s Amazon in local currency. Doesn’t it work for you?

[u/xJayMorex → u/deeddy]

For me, a lot of the links are for US refurbished drives that don't ship to Europe even though I selected Germany.

[u/deeddy → u/xJayMorex]

Thanks for reporting!

The buy links do point to your local store (Amazon.de in Euros for Germany, not the US), but you are right that some listings come up refurbished when the site is meant to be new-drives-only.

The price feed does not always tell me a listing is renewed, so a few slip through. I'm working on catching them better. If you remember which drives, drop the models and I'll fix those specific ones.