Have you checked bugzilla ? Does this sound similar to your scenario  - 
https://bugzilla.lustre.org/show_bug.cgi?id=22749 ?

regards
p
On 1/5/11 9:14 AM, Alexey Lyashkov wrote:
> Hi Robert,
>
> On Jan 4, 2011, at 23:14, robert wrote:
>
>    
>> Hi Everyone!
>>
>> I just setup a lustre system on centos 5.5 and lustre 1.8.5. there are
>> three identical oss with four osts each.
>>
>> After having fantastic write rates but low read rates, I ran the
>> obdfilter-survey script to get a hint of what may cause this.
>>
>> Unfortnately obdfilter-survey in case=disk mode freezes on two of my
>> three oss at the write task of the 4 objs, 16 threads line and leaves
>> the system in an unstable state requiring a reboot.
>>      
> Can you provide /var/log/messages contents in time of running 
> obdfilter-survey ?
> if you able to replicate crashing - getting output sysrq+t  (in crash time) 
> be very useful to investigate that problem.
>
>
>
> --------------------------------------------
> Alexey Lyashkov
> [email protected]
>
>
>
>
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