Date: Mon, 22 Dec 2014 14:09:56 +0000 From: Peter HEINER <p.heiner@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: 10.1 RC4 r273903 - zpool scrub on ssd mirror - ahci command timeout Message-ID: <CAL6RA3rUu-PSE9TxK6v9eYpEdfjLJ=5qG%2BbLdb=VEzkzUY9ZAA@mail.gmail.com>
next in thread | raw e-mail | index | archive | help
> So I now think the whole problem centers around the Samsung 850 PRO > 512GB SSDs. Too bad I do not have the budget to just buy two Intel (or > other) SSDs of similar size and see if the timeouts disappear.. > > I wonder if this is a firmware issue with the drive or just some > misguided fancy energy saving feature of this particular drive > model causing the whole trouble. I don't think it's the SSDs, as I'm seeing the exact same behaviour using 4 2TB WD Reds in a raidz1 with 10.1-RELEASE on a HP N40L as well. Whenever I do heavy reads like a scrub or send, there are CAM timeouts and eventually the drives detach. I had to downgrade to 10.0-RELEASE, which seems to work fine so far. The box ran Ubuntu until recently, without issues. I am happy to troubleshoot further, should anyone want to pick this up. I'm relatively new to FreeBSD, so any guidance on next steps to take is welcome. p
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAL6RA3rUu-PSE9TxK6v9eYpEdfjLJ=5qG%2BbLdb=VEzkzUY9ZAA>