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this post was submitted on 18 Jun 2025
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Technology
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Do mirrored drives in a computer count as 1 or 2 locations? It's physically 2 locations, but kinda act as one for most software type issues.
In a raid? No. A drive that has an application copy it every night or something? Yes.
I believe i have them in a RAID right now. At least I still meet 3-2-1 for important stuff since I have those drives in my computer, various flash drives, an external hard drive, and a cloud spot.
RAID definitely does not count as part of your backup, it's a helpful thing, but the entire array can fail. You still need minimum 2 other copies of your data to be considered safe
BTRFS, with periodic snapshots and scrubbing, in RAID 1, only accessible remotely.
Just saying, that can be a "2".