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Cake day: July 1st, 2023

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  • If the rise time isn’t 0, it’s not a square wave.

    And if that’s your definition then there’s no such thing as a real square wave.

    Just like no physical objects can have a perfectly square corner, there will always be some radius, even if it’s just 1 atom

    The reason making a true square wave is hard is that there are physical properties of real life electrical components that prevent voltage (or current) from changing instantly. Similar to how we can’t instantly accelerate a mass from 0 to some speed, it’s physically impossible. The faster you try to do it, the harder it is due to inertia. In electronics, there’s always natural capacitance and inductance slowing things down. If you want a 10v square wave, you have to push some amount of electrons through some amount of capacitance and inductance and that, while it can be very fast, is never instant.



    1. RAID for uptime, backups for data you care about. RAID(1+) will keep your data online when a disk fails, but backups are the real way to keep data around if shit hits the fan. For a personal media collection, you might be better served with a non resilient RAID0 (total failure if one drive fails) with a backup around to recover from when that happens. If you do e.g. a raid5 you lose 1 disk of capacity in exchange for 1 disk of resiliency, raid6 same but 2 disks. That gives you some safety but there are a lot of instances where those raids don’t save you from losing all your data. If you buy 4x 18TB drives, you could have 36TB from the 1st two drives and then backup to the other two drives.

    2. There’s no specific type of drive to worry about unless you’re doing RAIDs especially with ZFS. Search shingle RAID rebuild for the biggest thing to worry about there.

    3. Almost always, yes. Slow drives throttle the rest.

    4. I’ve never used them but people say good things about synology most of the time. Everything comes with a cost and it’s hard to make any sensible recommendations without knowing your constraints; primarily your budget.







  • I’m a huge supporter of open source, so Plex being closed alone makes it gross to me. Very little about Plex felt selfhosted.

    I also like to tinker a lot and jellyfin lets me screw around with much more under the hood - precise encoding settings, dlna customizations, I’m sure there’s more but the primary driver was ideology. I’m not giving my money to some company that’s primarily developing features I don’t want so that I can use my own media to the fullest.

    I’ve had very little issue with hardware accelerated encoding, but I already had the right drivers installed and on unix OSes that’s probably the hardest part







  • stevestevesteve@lemmy.worldtoSelfhosted@lemmy.worldMy Selfhosted Homepage
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    1 year ago

    Personal preference: Jellyfin instead of plex

    Some that I run that you don’t seem to have anything for:

    • Lancache (if you have several gaming PCs on the network or host any kind of lan party)
    • surveillance camera software e.g. shinobi
    • I see grafana, but other monitoring services like icinga, librenms, etc
    • Mayan EDMS - I’ve found this really helpful as anything I get in the mail, I scan in, and this makes it all searchable and retrievable.
    • There’s a whole hole you could dig if you start getting into home automation (I use home assistant)