Comment on What are good harddrives to use with serves

• avidamoeba@lemmy.ca ⁨1⁩ ⁨month⁩ ago

  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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• peregus@lemmy.world ⁨1⁩ ⁨month⁩ ago

  IMHO RAID6 is the only way.

  Or SnapRaid

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