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Written by π•½π–šπ–†π–Žπ–‰π–π–—π–Žπ–Œπ– on 2024-12-03 at 09:46

RAID 1 is mirroring. If you accidentally delete a file, or it becomes corrupt (for reasons other than drive failure), RAID 1 will faithfully replicate that delete/corruption to both drives. RAID 1 only protects you from drive failure.

Implement backups before RAID. If you have an extra drive, use it for backups first.

There is only one case when it’s smart to use RAID on a machine with no backups, and that’s RAID 0 on a read-only server where the data is being replicated in from somewhere else. All other RAID levels only protect against drive failure, and not against the far more common causes of data loss: user- or application-caused data corruption.

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