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Date:      Thu, 10 Sep 2009 22:18:05 +0400
From:      pluknet <pluknet@gmail.com>
To:        George Mamalakis <mamalos@eng.auth.gr>
Cc:        freebsd-stable@freebsd.org, Ivan Voras <ivoras@freebsd.org>
Subject:   Re: FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues
Message-ID:  <a31046fc0909101118u6de8d07ey73e06b8f3abb496c@mail.gmail.com>
In-Reply-To: <4AA92EF1.6010804@eng.auth.gr>
References:  <4AA90D88.4010004@eng.auth.gr> <h8b3p3$h2t$1@ger.gmane.org> <4AA92EF1.6010804@eng.auth.gr>

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2009/9/10 George Mamalakis <mamalos@eng.auth.gr>:
[about aac0: COMMAND 0xffffff80003d9440 TIMEOUT AFTER 40 SECONDS]
>> It looks like the controller was too busy rebuilding to take any new
>> requests. It is possible you have filled the controller's write cache and
>> that is why the lag happened at this point. You can easily test this theory.
>>
> This is the exact reason why I am asking this question. If this behavior is
> normal, then there is no problem with me. But I couldn't be sure whether it
> was a driver's problem or a controller's problem.
>

I see it from time to time on a number of boxes. You can often ignore this.
It might be due to (and a symptom of) high disk workload.
Btw, there was a recent change to increase command timeout to 120s.

> Thank you for your answer again, and (now that you mentioned it:) ) in case
> anyone knows whether we'll be able to see partitions > 2T in the future (or
> now?!), please say how :).
>

Look at gpart(8).

-- 
wbr,
pluknet



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