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Date: Sat, 10 Mar 2007 00:26:34 +0100
From: Wilko Bulte <wb@freebie.xs4all.nl>
To: Ivan Voras <ivoras@fer.hr>
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Cc: freebsd-current@freebsd.org, Matthew Jacob <mj@feral.com>,
	mjacob@freebsd.org
Subject: Re: MFC request: QLogic 24xx FibreChannel controller
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On Sat, Mar 10, 2007 at 12:18:13AM +0100, Ivan Voras wrote..
> Matthew Jacob wrote:
> > Well, based upon the serial number they aren't the same disk then.
> 
> I have no problems with accepting that, but can you offer some
> explanations for the behaviour:
> 
> >> But they are the same device - if I write something on one of them, I
> >> can read it from the other.

It could be that the RAID box offers you different serial numbers via
different ports on the array.  

I know older DEC arrays presented the same serial# for different presented
LUNs.  Not the effect as what you are seeing, but it can serve as an 
illustration of what might happen with external RAID boxes.

-- 
Wilko Bulte				wilko@FreeBSD.org