FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues

pluknet pluknet at
Thu Sep 10 18:18:08 UTC 2009

2009/9/10 George Mamalakis <mamalos at>:
[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).


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