You say the sound comes from the power supply and the HDD is not plugged into the computer.
My diagnistic: the power-supply makes a noise when it operates at very low load (almost 0mA of current), it is probaly making the cyclic noise because of some blinking LED or another very small variation of the loaf somewhere.
This is a very common symptom of cheap power-supplies, but it doesn't necessarly mean it isn't working normally, just an annoyance.
It wasn't sensible, given the short life of DNA. One of those sci-fi ideas that caught media and technophile attention, but wasn't ever going to go anywhere.
Project Silica appears to be attempting very high density, very long life storage, though.
I recall watching a documentary (on Curiosity Stream maybe? I'm no longer subscribed) on data storage longevity. It covered DNA storage, which I think this PBS video w/ transcript provides more recent coverage of its developments. As well as holographic storage, which I could only find the Wikipedia page for.
As for which one I think might be the future, it's tough to say. Tape is pretty good and cheap but slow for offline storage. Archival media will probably end up all being offline storage, although I could see a case for holographic/optical storage being near line. Future online storage will probably remain a tough pickle: cheap, plentiful, fast; select at most two, maybe.
Excited for you! I'm going from 1x 12tb USB drive to 4x internal 18tb drives. I'm building the NAS from scratch and keeping my other server for its current services (mostly Plex). My parts have been defective though, so it's all just sitting waiting for a replacement mobo.
The amazing thing about those are that they are halfing the rebuild time. With large drives you get rebuild time of over 24 hours which is actually frightening.
Setup is a one time thing and yes you need to be carefull about it but i bet software support will come as soon as those get more mainstream.
Never ever going to buy Seagate again after the crap they've pulled on their Exos drives.
They simply decided to completely trash SMART and spin down commands. The drives simply won't give you useful SMART data nor they won't ever actually spin down, you can't force it, the drive will report is as if it was spun down but in reality its still spinning.
ZFS and BTRFS could update their codebase to account for these (if they haven't already), but I agree that their extra mechanical parts worry me. I really don't care about speed - if you run enough HDDs in your RAID then you get enough speed by proxy. If you need better speeds then you should start looking into RAM/SSD-caching etc. I'd rather have better reliability than speed, because I hate spinning rust's short lifespan as-is.
20.04 and 22.04 were LTS versions, aka, long term support.
Any application that requires stability should run on LTS versions. Combined with Ubuntu being one of the most popular distros, makes 20.04 and 22.04 the most popular choices for anything in a home lab and many smaller business needs.
Whether you're building a server for home DNS, or a time server for a small business, then you're probably using Ubuntu as the base.
I think the next LTS version will be 24.04, so things might shift sometime after that.
If I where you I would just buy a regular case that can fit a decent amount of HDDs like a fractal define 7 or one of its older versions and transplant your current computer into that with some new drives. 100tb is 5 20tb drives so you don't need that many.
USB enclosures are not a great way to handle storage as USB tends to be unreliable.
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