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Cake day: June 1st, 2023

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  • Pi-hole works by giving clients non-routable addresses in response to DNS queries of known ad-serving domains. If the client (web browser, phone, smart device, etc) doesn’t let you set its DNS server (as many no longer do) and doesn’t obey DHCP, then you can’t feed them those addresses. You could block outbound DNS traffic from all clients except your Pi-hole, but in response some clients will just refuse to work entirely. And if they require DNSSEC (or DoT/DoH with a pinned certificate), there’s nothing you can do.












  • The real downside to SMR drives is “random” writes; adjacent tracks need to be re-written, and then their adjacent tracks, and that keeps going until the tracks adjacent to a write happen to be empty. It doesn’t matter much for long sequential writes (because adjacent tracks will be overwritten anyway). I think the re-writing process also hurts read performance for the host, but reads alone don’t cause rewriting.

    If you need to reshape/resilver your array (grow, shrink, or change geometry), it’ll probably take weeks or months with an SMR drive compared to days for a CMR drive.


  • The only time I’ve had drives from either company fail was when I knocked my drive cage off the desk while it was running; they’ve all been very reliable otherwise. Seagate drives are usually less expensive, though.

    In active service I currently have 5 WD CMR drives, 1 WD SMR drive, 5 Seagate CMR drives, and 2 Seagate SMR drives. I also have 1 WD drive in storage. All WD drives are “Red” (the CMR ones now being called “Red Plus”), the CMR Seagate drives are “IronWolf”, and the SMR Seagate drives are “Barracuda”. My oldest WD drive is from 2018 and my oldest Seagate drive is from 2020.