Well, that was painful, and more than a little odd. As I reported before, the system halted dead during the re-shape from 13 disks to 14 on the RAID6 array of the main server. The array reassembled after reboot, but with only 12 drives. I'm pretty sure one drive was missing because it (the 14th) wasn't in mdadm.conf, because of course I had not put it there, yet. I'm not exactly sure why the 12th wasn't assembled in the array. Any way, during the continued re-shape, it halted again. I ...