How does corrupted memory affect ZFS's performance? Much of the replication state is stored in memory; is it possible you could lose data from a single bit being flipped?
Could you be more specific? You seem to just be linking to random posts about ECC vs. non-ECC. I don't see anything specifically there about the root of the file system.
(I'll happily grant that this scenario is so unlikely as to be impossible for all practical purposes, but having skimmed the stuff you linked to I don't see why it couldn't happen theoretically.)
