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Joined 1 year ago
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Cake day: June 25th, 2023

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  • It can be a one-time setup.

    Right up until your laptop gets its motherboard replaced and won’t boot due to a MOK-signed module (in my case it was ZFS, which I needed for the machine to actually function).

    At which point you

    • Switch secure boot from enforcing to permissive mode (note you can’t turn it off entirely, or the enrollment will fail with an error that your system doesn’t support secure boot).
    • Boot into your OS.
    • Find the arcane command to re-enroll the MOK. That’s sudo mokutil --import /var/lib/shim-signed/mok/MOK.der (for Ubuntu derivatives and probably others), in case someone finds this post in the future.
    • Reboot again, accept enrolling the key.
    • Reboot again, and switch back to enforcing.

    If you have a BIOS password, encrypted filesystem, and all the other moving parts that make having secure boot enabled actually a meaningful exercise, this is neither a fun, nor particularly quick process.

    As for modules being signed automatically when built by DKMS, I’ve never had an issue with that.


  • Since the realistic competitor here is probably magnetic tape, current-generation (LTO9) media can transfer at around 400MB/s, taking 12 hours and change to fill an 18TB tape.

    Earlier archival optical disk formats (https://news.panasonic.com/global/stories/798) claimed 360MB/s, but I believe that is six, double-sided discs writing both sides simultaneously, so 30MB/s per stream. Filling the same six (300GB) discs would take about an hour and a half.

    Building the library to handle and read/write in bulk is always the issue though. The above optical system fit 1.9PB in the space of a server rack (and I didn’t see any options to expand further when that was current technology), and by the looks is 7 units that each can be writing a set of discs (call that 2.5GB/s total).

    In the same single rack you’d fit 560 LTO tapes (10.1PB for LTO9) and 21 drives (8.4GB/s).

    So they have a bit of catching up to do, especially with LTO10 (due in the next year or so) doubling the capacity and further increasing the throughput.

    There’s also the small matter that every one of these massive increases in optical disc capacity in recent years has turned out to be vapourware. I mean I don’t doubt that they will achieve it someday, but they always seem to go nowhere.


  • From the video description:

    I have been a Samsung product user for many years, and I don’t plan to stop anytime soon

    And all sympathy I had for this person just vanished. If you don’t demand better, they will keep doing - and getting away with - shit like this.

    Voting with your wallet might be the one voice you have left in this world, what a way to squander it by continuing to buy products from companies whose representatives behave in this manner.









  • I bought one of the really sturdy kind (weighs about 40kg / 88lb). Uprights are solid 100mm/4" rounds of pine, none of that hollow cardboard tube nonsense.

    My XL-sized void loves to haul arse into the room and leap right from the ground to the top level (around 1.6m / 5’3" from the floor), which makes the thing rock side to side fairly precariously. He hasn’t knocked it over yet, but some day I’m sure he’ll come in too hot.