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Date: Wed, 13 Mar 2002 13:11:01 -0800
From: Dave Hansen <haveblue@us.ibm.com>
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To: walter <walt@nea-fast.com>
CC: linux-kernel@vger.kernel.org, davis@jdhouse.org,
        Gerrit Huizenga <gerrit@us.ibm.com>
Subject: Re: oracle rmap kernel version
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walter wrote:
> Not sure right off the top of my head. I'm planning on using 2 controllers, 
> each from a different manufactures. My reasoning behind this is two fold. 
> Number one is in case a "bug" creeps up with one of the drivers I can still 
> string all the drives off the other controller. Performance will decrease, 
> but I'd rather be slow than dead in the water. The second reason is the 
> probability of both controllers failing (hardware) at same time due to a bad 
> chip batch at the manufacture.  Do you have any suggestions on controllers? 
> Adaptec and IBM (not sure which models) ?

I haven't done any of the testing myself.  But, I was told that the 
Adaptec AIC stuff is good.  I think that the LSE patch has been tested 
on with Adaptec (aic7xxx) and QLogic fiber channel controllers.  I guess 
that the QLogic stuff is liked because the drivers are open source.

I was surprised to see that the ServeRAID driver isn't touched by the 
lse patch.  I thought that it still uses the io_request_lock in 2.4.

Care to add anything, Gerrit?

-- 
Dave Hansen
haveblue@us.ibm.com

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