FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues

George Mamalakis mamalos at
Thu Sep 10 16:53:12 UTC 2009

Ivan, thank you very much for answering; and now to your comments:
> 3650 M1 or M2?
On the box it writes x3650 (I forgot the initial 'x' before, sorry).

> You have received this message because you are running a debug kernel; 
> a normal kernel with debugging disabled would not have shown it.
So far, I understood :)

> 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.
> If you determine rebuild/resync is problematic, you might consider 
> using a RAID mode that doesn't require it to be so extensive, like 
> RAID 10 with 4+ drives, or software RAID with ZFS.
I was thinking of using other raid modes, along with ZFS (although still 
labeled 'experimental', and this is going to be our department's main 
file server, so I still have my second thoughts about it...), since 
FreeBSD does not recognize my 2.8T volume during installation. This 
means that I 'll have to break it into more volumes in order for FreeBSD 
to see it.

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 :).

George Mamalakis

IT Officer
Electrical and Computer Engineer (Aristotle Un. of Thessaloniki),
MSc (Imperial College of London)

Department of Electrical and Computer Engineering
Faculty of Engineering
Aristotle University of Thessaloniki

phone number : +30 (2310) 994379

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