Date: Mon, 10 Sep 2018 13:51:23 -0400 From: "Kenneth D. Merry" <ken@FreeBSD.ORG> To: Lee Brown <leeb@ratnaling.org> Cc: freebsd-scsi@freebsd.org Subject: Re: mpr(4) and disable_eedp Message-ID: <20180910175123.GC40028@mithlond.kdm.org> In-Reply-To: <CAFPNf5-GVZkeqeS3msvbM5Umop_QqFs=%2B4qvzfjegyGpRqfAbQ@mail.gmail.com> References: <CAFPNf5-GVZkeqeS3msvbM5Umop_QqFs=%2B4qvzfjegyGpRqfAbQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Sep 10, 2018 at 09:47:00 -0700, Lee Brown wrote: > On Thu, Nov 16, 2017 at 6:28 AM, Kenneth D. Merry <ken@freebsd.org> wrote: > > > On Wed, Nov 15, 2017 at 12:24:47 -0800, Lee Brown wrote: > > > I'm looking to build a SAS array with a Dell MD1420. It will be attached > > > via a SAS 9300-414E HBA in a Dell R330. > > > > In theory it should be fine. I haven't used a Dell enclosure recently, but > > from posts here, it seems that they like to turn on Type 2 Protection > > Information on the drives. (Assuming you buy the drives from Dell.) > > > > If they do that, you can either reformat, or see the patch here for the > > mpr(4) driver to disable using protection information: > > > > https://docs.freebsd.org/cgi/getmsg.cgi?fetch=308820+0+ > > archive/2017/freebsd-scsi/20171022.freebsd-scsi > > > > I have been using this patch in production on an 11.1 kernel with great > success. > > I'm upgrading to 11.2 today and am wondering what's required to push this > into the source tree (so I can be lazy next time and not have to patch)? I > can provide testing and maybe the MD1420 could be added to the officially > supported hardware list? Let me know how I could help. > > BTW, there's a typo in the patch for mpr.c "dsiable" should be "disable": > + OID_AUTO, "dsiable_eedp", CTLFLAG_RD, &sc->disable_eedp, 0, I put in a slightly different version of the change in March 2018 that just disables Type 2 data protection: https://svnweb.freebsd.org/base?view=revision&revision=331422 I MFCed it a few days later, so 11.2 should work without a patch. If it doesn't, let me know. There is no sysctl/tunable variable in the new version. To get the Dell MD1420 put in as supported hardware, you could probably put in a documentation bug report, the links are here: https://www.freebsd.org/support.html Ken -- Kenneth Merry ken@FreeBSD.ORG
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20180910175123.GC40028>