major pita w/LSI Tyan TA26 combo

V. T. Mueller freebsd-amd64 at
Sat Mar 11 13:50:03 GMT 2006

Hello Ken,

Ken Gunderson schrieb:
> On Mon, 06 Mar 2006 17:34:24 +0100
> "V. T. Mueller" <freebsd-amd64 at> wrote:
>>We used to have problems with adapters running at 66MHz or more 
>>using risercards in a number of Tyan S2707. Those risercards came 
>>from Chenbro, along with the cases. By replacing them with Tyan 
>>risercards (which became available a few months *after* the boards) 
>>those problems vanished.
>>And now comes the interesting part: Months later, problems began to 
>>reoccur. In the end we found out that the power supplies were of 
>>somewhat low quality. Replacing the power supply helped in every 
>>system that was affected.
> Could you please provide more details about the low quality units, e.g.
> make and model?

Sorry for the delay. Here is the data of one of those PSUs:

EMACS/zippy Model: P2U-6300P (V)
Ser. No.: T33406403

We had a bunch of them replaced with newer versions. I can't tell 
you from which serial number onwards the problems went away but I 
was told that all models with "black labelled fan" cause problems 
and all with "blue labelled fan" work flawlessly. So the latter 
might be somewhat revision 2 ...


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