On 03/26/2013 02:01 PM, Joakim Ziegler wrote: > Anyone seen anything like this before? It's not very frequent, but it's > very annoying. I haven't, but the first thing I'd do in the situation you describe is update the firmware on the RAID card. I looked around at other discussions of the same error, and it looks like some people have also resolved that problem by switching to the deadline scheduler # echo noop > /sys/block/sdb/queue/scheduler ...but I wouldn't do that unless you update the firmware and still see the error.