From owner-freebsd-hackers@FreeBSD.ORG  Thu Nov 10 13:22:23 2005
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Date: Thu, 10 Nov 2005 07:06:26 -0600 (CST)
From: Sergey Babkin <babkin@verizon.net>
To: Danny Howard <dannyman@toldme.com>, freebsd-geom@freebsd.org,
	freebsd-hackers@freebsd.org
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Subject: Re: Re: GEOM for multipath?  How?
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>From: Danny Howard <dannyman@toldme.com>

>Hey ... yes, I recall there being issues with the QLogic drivers ... I
>wonder if anyone has given the mpt drivers a shot?  I was able to speak
>with an engineer at Engenio (now owned by LSI) and she said there were
>some issues with the QLogic dual-port cards that were interesting to
>her, but the LSI dual-port cards behaved differently ...

QLogic worked fine in multi-path configuration with UnixWare.
I think LSI and Adaptec did too. The only trick is to make sure 
that the IRQs of the cards are not shared between the cards or with
any other device.

-SB