kern/135408: [aac] Adaptec 5405 RAID controller hanging under high load +suggested fix

[Aleksandr Stankevic]

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 <yuri.gorchakov at point- 
group.ru> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> 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.
> - --
> С уважением,            Sincerely,
> Юрий Горчаков            Yuri Gorchakov
> технический специалист        technical speciali 
> st
> компания "iT POiNT"        "iT POiNT" company
> Росиия, г.Томск        11a Rabochaya st.,
> ул.Рабочая 11а, 634050        Tomsk, Russia, 634050
>
> Email:    yuri.gorchakov at point-group.ru
>    info at point-group.ru
> WWW:    http://point-group.ru
>
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