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I have never seen an implementation of e.g. a mirror that gives up on disagreements of both disks. Repairing/redundnancy is what raid is there for.
Edit: maybe old hardware raid does not check?
No, raid for disk failure: https://en.wikipedia.org/wiki/RAID
Raid has no checksum, see argument here: https://superuser.com/questions/769104/is-raid1-or-similar-needed-for-btrfs-zfs-to-protect-against-bit-rot
But look like some raid implementation (and lot of drive) have error correction now: https://en.wikipedia.org/wiki/Error_detection_and_correction#Data_storage https://serverfault.com/questions/77710/is-bit-rot-on-hard-drives-a-real-problem-what-can-be-done-about-it