SUMMARY: memory address not aligned errors

From: Michael Wright mikew@chsws44.medaphis.com)
Date: Thu Aug 08 1996 - 13:05:23 CDT


Sorry if you get multiple copies of this SUMMARY, I've been having problems
with mail recently, and I wasn't sure if the first one went out.

I'm also sorry I forgot to fill in the subject line earlier. Here's the
text from my original message:

> I have seen the following memory errors on two SPARCstation 20's
> if I shut them down to the "ok" prompt, and immediately run "test-memory":
>
> ERROR: Physical Address = 0x459510 U-number = J0201
> Expected = 0xa5a5a5a5 Observed = 0xa5a501a5
> ERROR: Physical Address = 0x459518 U-number = J0201
> Expected = 0xa5a5a5a5 Observed = 0xa5a501a5
> Memory Address not Aligned
>
> However, if I run another memory test after the first one fails, it
> always completes without errors. Has anyone ever seen this before?
> Both SPARCstations have 8 64MB memory cards.

Sun replaced two of the SIMMS, didn't fix the problem. Next they
replaced the CPU board, didn't fix the problem. Finally, the SUN
technician said noticed how it only occurred right after we shut down
the machine, and ran the memory test, and then it only occurred
once. Since we could duplicate it on another SPARCstation 20, he
called SUN and they told him, "Oh yeah, that's a known problem, you
have to issue a "reset" before you run the memory test, or else you
will see that error".

Thanks to all who responded. I wish SUN could have just told us this
when we called in and explained the problem originally.

...Mike

-- 
Michael Wright 			UNIX System Administrator
Medaphis Systems Corporation	email: michael.wright@medaphis.com
8085 Rivers Avenue		Phone: 803-569-8535
N. Charleston, SC 29406		FAX  : 803-569-8502

Status: RO



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