On Monday 04 May 2009, Jonathan Haws wrote:
I suggest that you run some stress tests in a conditioning cabinet to see if the other boards don't show any problems.
That is a good idea. I haven't thought of performing those tests. Are there specific tests I can enable in the U-Boot environment for that?
Perhaps the memory tests from the POST infrastructure. But from my experience a realworld application running under Linux is a good test. For example compiling a Linux kernel in a loop. Perhaps mounted via NFS. Something like this should fail at some time when SDRAM related problems exist.
We have been using a couple of these boards extensively and in some pretty loaded configurations. For example, one board has been used as a data capture system to capture gigabytes of data over a network connection. That uses RAM extensively before it actually writes it out to disk.
That's good. Which OS was used here? Linux?
But Jerry's note about x-raying the problematic board is a good idea.
Best regards, Stefan
===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de =====================================================================