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Due to risk of failure or risk of data corruption because the mirror can’t tell which drive is right when there’s a difference?

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TheHolm@aussie.zone ⁨1⁩ ⁨month⁩ ago
ZFS or BTRF mirror will know which side is at fault due to checksums. I’m more concern about simultaneous falures of two disks. Rebuilding of a RAID puts lots of pressure on remaining disks, so probability that remaining one dies too is much higher. with RAID6 3 disks need to die to lost date, which is less likely but not impossible.

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turmacar@lemmy.world ⁨1⁩ ⁨month⁩ ago
The second one.

Mirroring is good for speed and redundancy, but a storage mechanism with parity checks will all ways be more recoverable. And depending on the array you have far more storage available.

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- avidamoeba@lemmy.ca ⁨1⁩ ⁨month⁩ ago
  I think data checksums allow ZFS to tell which disk has the correct data when there’s a mismatch in a mirror, eliminating the need for 3-way mirror to deal with bit flips and such.
  
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