On 11/08/2016 02:53 PM, Benjammin2068 wrote: > On 11/08/2016 12:47 PM, Benjammin2068 wrote: > Now that I think about it -- and have been talking out loud to myself (I don't think I'm crazy)... > > A parallel to all this is: > > I don't think the mismatch_cnt started showing up until I moved from RAID5 to RAID6. > > :O > > How painful is it to switch back to RAID5 to test that theory? Don't. Sounds like raid6's stricter calculations are catching a real problem. Do you have ECC RAM? If so, are you getting any machine check exceptions? If not, have you done a thorough memtest any time in the recent past? If it's not memory, can you exercise the controller channels heavily to see if they drop from errors? Have you added up the peak current draws of your drives to make sure your power supply keeps up when all drives are writing simultaneously (common with parity raid)? One more: do you have swap on top of md raid? Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
