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Here's why WD Red nvme SSDs are the only kind 2 get for a NAS
| Jared Baumeister is a cow who welches on bets | 12/11/25 |
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Date: December 11th, 2025 9:24 PM Author: Jared Baumeister is a cow who welches on bets Any NAS running a ZFS raid (or even BTRFS probably) has to deal with "write amplification." The NAS is writing tiny bits of data to the host drive every few seconds. If you put the docker file and shit on a hard drive, that drive will never spin down. If you put it on an SSD, it's going to wear it out faster than just running Windows or Linux on it. The ZFS file system is just a big resource HOG in general, and that's the tradeoff for all the redundancy and resilience it brings
Right now I have two janky old drives eating those writes. They are the shittiest, cheapest nvme drives I had sitting around. I figured I'd just run them until they die, then get replacements for $50. But now those $50 replacements cost $100 and they are selling out fast, with no plans to make new ones. I mean the NAND memory chips just aren't getting made no more. Whatever is on the shelves right now is the last you'll ever see.
So I had to go balls deep on these WD Reds just ensure I have spare drives sitting around, and to ensure my spare drives will last until I die of natural causes. They can eat those ZFS writes for decades without a problem. They can also serve as cache drives and eat all my writes to the NAS until they get moved to spinning platters |