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Is RAID still needed? (programming.dev)

submitted 7 months ago by [email protected] to c/[email protected]

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Me and my friend were discussing this the other day about how he said RAID is no longer needed. He said it was due to how big SSDs have gotten and that apparently you can replace sectors within them if a problem occurs which is why having an array is not needed.

I replied with the fact that arrays allow for redundancy that create a faster uptime if there are issues and drive needs to be replaced. And depending on what you are doing, that is more valuable than just doing the new thing. Especially because RAID allows redundancy that can replicate lost data if needed depending on the configuration.

What do you all think?

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[–] [email protected] 4 points 7 months ago (1 children)

Many causes of data loss affect all RAID drives equally from accidental deletion over power surges, fire, water damage, theft,....

[–] [email protected] 1 points 7 months ago (1 children)

I really, really liked @[email protected]'s answer, because even as I was reading it, I was thinking of things that they could have said—but didn't—which would have been easily rebutted. Those things fell into two basic categories: malware, and environmental effects.

Environmental effects like water damage and theft are a problem for any local storage, regardless of the technology. If it's a RAID, or an external USB drive, or even a NAS in your closet. The power surge is probably the best example of RAID not being backup, since it's very possible that one device might receive the surge but not the other, if they're connected to different outlets. But as for the other ones? Eh, I don't really buy it.

[–] [email protected] 2 points 7 months ago

I have literally lost all data on a RAID6 of 12 drives since the power distributor in the server (the bit between the redundant PSUs and the rest of the system) got fried and took 5 out of the 12 drives with it.