🚀 go-pugleaf

valerie@cs.umass.edu (Valerie Caro) writes:


>   In the past few months we have started getting alot of
>   Cache parity errors on several of out DECstation 5000/200's.
>   This only started happening after these machines were updated
>   to Ultrix 4.2a, but I am not sure if that is related. Can
>   anyone tell me what causes these errors? Is this necessarily
>   a hardware problem?

>	       Thanks,
>	       Valerie Caro

>	       valerie@cs.umass.edu

We began experiencing these errors.  We do not know exactly when
it started.  But it could have been because of Ultrix 4.2a.
On a 5000/240 the errors were infrequent.  On a 5000/200 they 
occurred twice an hour on average.  It seemed tied the the # of 
seconds on the clock.  IE: the occurance pattern was like:
4:28:43
4:58:43
5:28:43
5:43:43
6:28:43
...

The seconds # changed every time we rebooted it.
 
Digital replaced the system board on both.  
 
I just checked.  The 240 is OK now, the 200 just spat out 2 errors
today after being up for 2 days.  They had the same # of seconds.
 
We have another 200 with no problem.
We have other 240s with no problem.
So, you tell me?
 
Charles Allen
CBALLEN@CLEMSON.CLEMSON.EDU