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Date:      Wed, 23 Jul 2008 21:23:52 +0100
From:      ian j hart <ianjhart@ntlworld.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: unable to use gmirror on supermicro 5015b-mt
Message-ID:  <200807232123.52186.ianjhart@ntlworld.com>
In-Reply-To: <200807221659.20396.ianjhart@ntlworld.com>
References:  <200807221659.20396.ianjhart@ntlworld.com>

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On Tuesday 22 July 2008 16:59:20 ian j hart wrote:
> These are new boxes.
> http://www.supermicro.com/products/system/1U/5015/SYS-5015B-MT.cfm
>
> core 2 Q6600 CPU
> 8Gb 667 RAM
>
> Boxes were memtested from Fri-Mon okay. 6.3-RELEASE (amd64) installs fine.
> Build cycle okay. Running (no load) for a week or so.
>
> However, when I try to configure gmirror they hang on boot.
>
> After some fiddling it appears issuing
> #kldload geom_mirror
> hangs the boxes very hard. Ping response stops (after 3), no CAD response,
> CDROM draw doesn't open!
>
> This may well be a foolish thing to do but another (different) amd64 box
> doesn't hang. I don't believe this to be amd64 specific, I suspect that
> there's something strange about this hardware.
>
> There are very many BIOS options and I feel like I've tried them all
> without getting anywhere.
>
> I'm "on holiday" this week and I've borrowed a box to test. Any suggestions
> would be welcome. I'll (re)try anything but I need help to stay focused.
>
> Before you ask, no I cannot try 7.0-RELEASE, but that's a whole other
> thread (which may bear fruit more quickly).
>
> I already dropped the RAM to 2Gb and disabled the memory remap in the BIOS.
>
> dmesg after sig [AHCI disabled, SATA legacy mode]
>
> Thanks

As I suspected, no takers :)

"Fix".

In /boot/loader.conf

hw.ata.atapi_dma="0"

This allows kldload without hang. I'm sure that this fix will allow me to 
configure a mirror. I'll post back if I'm wrong.

-- 
ian j hart



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