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The error is occurring between the drive and the sata controller on the mobo. There’s also the whole issue of whether the OS or the drive is responsible for error handling. If the the drives are SAS drives, typically the OS uses fire and forget methodologies for write commands. Other drives might not support that and require zfs to handle errors at the software/kernel level


replacing the cable / testing the disk on an isolated system would confirm this


It would but I encountered a situation once, where when I would remove the drives of the array and test the disk 1 by 1 they would all work. It wasn't until all the drives were powered on and under max write stress would the power-supply under-volt to drives randomly making it appear as multiple drives were all failing.




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