From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 111381] mvsas 0.8.16 on Marvell 88SE9485 reports timeouts on
load
Date: Mon, 08 Feb 2016 17:24:58 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=111381
--- Comment #4 from Gabriel A. Devenyi ---
After much more research and reading, I believe I've found the root issue
causing the communication timeouts to the disks. I have not changed any cables
(other than reseating everything).
I came across several reports of marvell (mvsas) controllers randomly causing
issues with load, which mentioned SMART.
http://www.spinics.net/lists/linux-ide/msg50075.html
https://bugzilla.kernel.org/show_bug.cgi?id=42679
So I decided to stop smartd and try my load tests.
I have now gone through three iterations of high-load zfs scrubs along with
iotest.sh hammering the array simultaneously with no timeouts or communications
issues. I believe this indicates some issue with the driver/controller/disks
handling smart commands during load.
Do you have any recommendations as how I can test this further? Is there any
debug info I can provide?
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