error message


Could anyone give me some pointers to investigating the following console error message.

WARNING: correctable error from pci0 (upa mid 1f) during dvma read transaction.


This is a SUN Enterprise 250 running Solaris 2.6. There are 2 RAID boxes, some external HDs and an AIT Tape drive attached.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

What the next messages? Can you give me more information.

Looks like an OS level error regarding a PCI DMA bus transaction.  I'm no SPARC bus expert, but I'd look first at what card is residing in that slot (PCI0) to investigate what might be causing the problem.

Other than that, I'd look at the use of the "upa" in there as an indicator that it's a frame buffer - seems to be the only device driver that has that word in it.

Look on the bright side - at least the error is correctable - most likely it just re-posts the transaction.  A performance hit, but it still works.

You might also want to look at the possibility of one of your PCI busses being saturated, which would cause a possible miss on a DMA transaction.


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
UPA is a bus not frame buffer, CPU and memory are connect to UPA bus too. That mean something in UPA maybe fail.

It look like memory fail. (I check it from
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Unix OS

From novice to tech pro — start learning today.