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got the disk space and the bandwidth to spare so
(sopuli.xyz)
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this post was submitted on 15 Sep 2023
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if your that passionate about NASs, may I ask how does one negate data loss if a lighting were to strike? or fire?
I get Raid an all that, but I don't care how many times my data got burnt if it ever will.
Same with lightning, lightning rods are a thing, so maybe that? Idk what would be dmged if an entire lightning passes thru your house in a wire or not, like electromagnetic fields are a thing.
Off-site backup is the proper answer to your question. All this really depends on your own tolerance or comfort with the possibility of losing data. The rule of thumb is that there should be at least three different copies of your data, each in a different physical location. For each of them, there should be redundancy of some kind implemented to guard against hardware failure. Redundancy is typically achieved by using mirrored drives or by using RAID of some kind. Also, if you'd like to know, using RAID in which you can only lose one disk in the array is not typically considered a sufficient level of protection because of the possibility of a cascading drive failure during replacement of a failed disk. It should be at least two.
"cascading drive failure" the what now? How do drives die in a domino effect?
three locations seem a bit much, but I totally understand it. Safe storage is tedious, huh.
Drives in a NAS age at about the same rate between them. If you had multiple drives around the same age or from the same manufacturing batch, there's a higher chance they fail around the same age. After one disk in the array fails, you can insert a new drive and rebuild the array, but during the rebuild, all your drives are in heavier use than normal operation. If you only have one disk redundancy, you're vulnerable until that rebuild is complete.
oh wow, makes sense. It's a very slim chance, but not zero. but doesn't a three mirror setup has the same vulterability.
So if the scenario is that we bought two of the same type, use it equally, they'll die at the same time. This sentance is also true if we up the number.