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You bought a NAS, filled it with matching drives and ticked the mirror option, so your files are safe. Are they? RAID keeps working when a drive dies, but it faithfully copies deletions, ransomware and corruption to every disk. This book separates availability from protection in plain English. You will learn how drives really fail, what each RAID level costs and survives, why rebuilds are risky, and what checksums and snapshots add. Then you will design backups that actually work: a practical 3-2-1 plan, versioned and offsite copies, restore drills, alerts and a written recovery routine. Three complete home designs show how to fit it all to your budget, so a failed drive becomes a dull Tuesday instead of a lost decade of photos.
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