On 30/09/20 02:40, David Madore wrote: > I welcome any suggestions on how to investigate, work around, or fix > this problem. uname -a ??? mdadm --version ??? https://raid.wiki.kernel.org/index.php/Linux_Raid#When_Things_Go_Wrogn I'm guessing you're on an older version of Ubuntu / Debian ? If I've guessed wrong (or even right :-) give us the requested info and we can dig further. Cheers, Wol