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Date:      Fri, 17 Mar 2017 16:53:08 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 211713] NVME controller failure: resetting
Message-ID:  <bug-211713-8-GC2IIHvqEu@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-211713-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-211713-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211713

--- Comment #23 from tkurmann@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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