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On several occasions, the earliest being on pre-release code in April 1988,
and the latest on V3R1 (in 1988 a B40, now a mod 200) I've experienced a
similar 'hang' situation.  I've most often noticed it in the middle of the
night, I'm the only one on the machine, editing a source member with SEU, 
and no other jobs running.  You press a key (F4, roll key, etc.), and the
system seems to hang for a minute or two.  I reported this to IBM on
a few occasions, but we didn't get anywhere trying yo find the cause of
the problem.


On Sat, 3 May 1997, Chris Rehm wrote:

> I have a customer with a wierd problem. I am hoping someone will have some
> feedback on this.
> 
> We recently upgraded one of our guys to a 530, and they have been
> appropriately astonished with wonderful performance, but a problem they
> had with one of their previous models has resurfaced. 
> 
> Occasionally, the machine will "stall". Their will be plenty of jobs
> sitting in batch, but all of them will be getting zero CPU. Even with the
> CPU utilization at <1%. Just as there is nothing apparently starting the
> stall, it appears to end for no reason. 
> 
> Has anyone seen this before?
> 
> 
> Chris Rehm             | You have to ask yourself, "How
> Mr.AS400@ibm.net       | often can I afford to be unexpectedly 
>                        | out of business?" 
> Get Warped or Get Bent!| Then get an AS/400.
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