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This new 40TB hard drive from Seagate is just the beginning—50TB is coming fast!
(www.techradar.com)
this post was submitted on 02 Jun 2025
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The main issue I see is that the gulf between capacity and transfer speed is now so vast with mechanical drives that restoring the array after drive failure and replacement is unreasonably long. I feel like you'd need at least two parity drives, not just one, because letting the array be in a degraded state for multiple days while waiting for the data to finish copying back over would be an unacceptable risk.
I upgraded my 7 year old 4tb drives with 14tb drives (both setups raid1). A week later, one of the 14tb drives failed. It was a tense time waiting for a new drive and the 24 hours or so for resilvering. No issues since, but boy was that an experience. I've since added some automated backup processes.
Yes this and also scrubs and smart tests. I have 6 14TB spinning drives and a long smart test takes roughly a week, so running 2 at a time takes close to a month to do all 6 and then it all starts over again, so for half to 75% of the time, 2 of my drives are doing smart tests. Then there's scrubs which I do monthly. I would consider larger drives if it didn't mean that my smart/scrub schedule would take more than a month. Rebuilds aren't too bad, and I have double redundancy for extra peace of mind but I also wouldn't want that taking much longer either