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

[Yuri Gorchakov]

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

- --
С уважением,
Юрий Александрович Горчаков
технический специалист
компания "iT POiNT"
Росиия, г.Томск
ул.Рабочая 11а, 634050

Email:	yuri.gorchakov at point-group.ru
	info at point-group.ru
WWW:	http://point-group.ru

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