That’s what backups are for, where the 3-2-1 backup strategy is best, but getting people to create even a single backup copy of their data is a seemingly futile endeavor, especially after their minds have been tainted by the RAID fallacy.
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- Copies of data.
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- Copies on separate media.
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- Copy stored off-site.
RAID exists to provide high availability, at the expense of increased complexity, and reduced reliability. RAID is NOT backup!
Frankly, I find it shocking that so many people sincerely believe that RAID can act as a backup, right up to the moment when they lose all their data.