[Bug 211713] NVME controller failure: resetting

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713

--- Comment #23 from tkurmann at gmail.com ---
Progess!
I updated the bios of the R720 to 2.5.4 and rebooted FreeBSD with the latest
snapshot 12-CURRENT 20170309. To my surprise reading using dd works with any
block size. The speed is capped at 2.0Gbytes/s, but it works. Writing on the
other hand seems to only work up to a bs of around 512k (didn't find the
threshold yet) and then it would timeout again. The speed cap made me
suspicious and I checked to see what pcie version the card was running with
(pciconf -lbace nvme0) and of course it was version 2.0. Under ubuntu 16.04 the
card was reported with version 3.0 and the speed limit was 3.2 Gbytes/s. I
assume this is related somehow, any thoughts?

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