FreeBSD 10.3/11.0 SCSI errors with Symbios Logic SAS3008 PCI-Express Fusion-MPT SAS-3

[Ken Merry]

Great!  I’m glad that fixed it.

It would be better to fix the problem with EEDP / Protection Information in the mpr(4) driver rather than having to have people disable the check.

Ken
— 
Ken Merry
ken at FreeBSD.ORG



> On Oct 20, 2017, at 1:55 PM, Shiva Bhanujan <Shiva.Bhanujan at Quorum.com> wrote:
> 
> Thanks for the patch.  I applied the patch on FreeBSD 10.3 and it has addressed the issue.  I've added the following to /boot/loader.conf.
> 
> hw.mpr.disable_eedp="1"
> ev.mpr.0.disable_eedp="1"
> 
> 
> I'm going to apply the patch in FreeBSD 11.1 also, just to make sure that works.  Is this going to be checked into stable/10 and/or stable/11?
> 
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> 
> From: Ken Merry [ken at freebsd.org]
> 
> Sent: Friday, October 20, 2017 7:34 AM
> 
> To: Shiva Bhanujan
> 
> Cc: Steven Hartland; freebsd-scsi at freebsd.org
> 
> Subject: Re: FreeBSD 10.3/11.0 SCSI errors with Symbios Logic SAS3008 PCI-Express Fusion-MPT SAS-3
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> 
> Ok. Yes, for #2, in theory we can disable EEDP / protection information in the mpr(4) driver and if DPICZ is set, the drive won’t require setting protection information on read and write commands.
> 
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> 
> That should let you access the disks normally.
> 
> 
> 
> That said, I’ve never played with protection information before, so I don’t know for sure. I have a drive that supports it and I’m formatting it now to turn on type 2 protection I may be able to debug things once I get that done.
> 
> 
> 
> In the mean time, I’ve attached a patch against the stable/10 version of the mpr(4) driver. Apply this patch, and rebuild and reinstall your kernel. Then you’ll be able to disable EEDP in the driver three different ways:
> 
> 
> 
> 1. Set hw.mpr.disable_eedp=1 in /boot/loader.conf. That will disable EEDP / Protection Information for all mpr instances.
> 
> 2. Set dev.mpr.0.disable_eedp=1 in /boot/loader.conf. That will disable EEDP for mpr0.
> 
> 3. sysctl dev.mpr.0.disable_eedp=1 That will disable EEDP on the fly for mpr0.
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> Let me know what happens.
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> 
> 
> Ken
> 
> — 
> 
> Ken Merry
> 
> ken at FreeBSD.ORG
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