Re: kern/135408: [aac] Adaptec 5405 RAID controller hanging under

The following reply was made to PR kern/135408; it has been noted by GNATS.

From: Mark Linimon <[e-mail]>
To: [e-mail]
Cc:  
Subject: Re: kern/135408: [aac] Adaptec 5405 RAID controller hanging under
	high load +suggested fix
Date: Thu, 16 Jul 2009 18:01:18 -0500

 ----- Forwarded message from Yuri Gorchakov <[e-mail]> -----
 
 From: Yuri Gorchakov <[e-mail]>
 To: Aleksandr Stankevic <[e-mail]>
 Subject: Re: kern/135408: [aac] Adaptec 5405 RAID controller hanging under
 	high load +suggested fix
 
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 Hi all,
 
 yesterday I received a driver which shortly must by available online on
 Adaptec site and should fix the issue. Here I'm attaching it. I
 personally have't tried it yet in a production.
 
 Aleksandr Stankevic wrote:
 > On a 16 gb machine that's nothong near a real solution to me. Loosing
 > 13gb of ram is not what i want.
 > Also, i've tried using (previously i was using raid10) RAID5 on a test
 > box, and have run a lot of stress on it ( buildworld -j16, iozone,
 > bonnie++, backups and etc). It didn't crash on me yet. I'm in process of
 > moving the box to production to see if it won't crash there.
 > But even if it works, raid1/raid10 is what i, and imho most people, use,
 > so we need it fixed anyway.
 > 
 > On 2009.07.14, at 08:21, Yuri Gorchakov <[e-mail]>
 > wrote:
 > 
 > Hi all,
 > 
 > yesterday I received a reply from a manager I bought the controller
 > from. He was emailing with Adaptec technical support in Russia and
 > suggested couple of things:
 >    as a temporary workaround you can setup your BIOS to disable "Host
 > system Memory Mapped I/O above 4GB" , but note that not all BIOSes may
 > support it. Disadvantage of this is that RAM from 3,5  to 4GB will be
 > unavailable most probably.
 >    Adaptec is now working on a release of 2.2.8-16891 driver which
 > suppose
 > to fix the issue. They promise to post it on their web site ASAP.
 
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