There are three arrays on this pdisk, and only one has failed. This happened a week or two ago also.
I thought I adjusted to have failed blocks relocate more quickly, but maybe not.
Anyway, the disks are 1 year old "refurbished" units with zero warranty from woot. I had to return two up front for failures. I'm thinking I may need to replace this disk
I still want to stuff a couple of 4:1 2.5 bays and load that up with 1tb disks, but unfortunately, I'm STILL NOT independently wealthy.