On 1/5/2018 1:50 PM, Phil Turmel wrote:
No. Parity is interleaved with data on all devices, chunk by chunk, on all default raid5/6 layouts.
Thanks Phil. So, I suppose then the final diagnosis of my issue was that the bad sector occurred in a non-raid portion of the drive, which is why it was never read from or written to, and hence never corrected.
BTW, my reallocated sector count remains at 0 on that drive, but whatever - maybe that's because there was no data to reallocate (though i would think it would physically reallocate some sectors regardless). Also, I keep getting Rebuild99 events on /dev/md0. But, I think that, when I have time, I'll add a drive for raid6, fail out sda, write it with 0's, update it's firmware (apparently seagate released one for these drives), and re-add it.
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