Felix Radensky wrote:

Yes, NAND and NOR are on the same local bus controller.

Maybe powerpc folks can provide some insight here.
Is it possible that simultaneous access to NOR and NAND
on MPC8536 can result in NAND timeouts ?

I've heard other reports of such problems with eLBC, but was unable to 
reproduce it myself last time I tried.  Could you reduce this down to a 
minimal set of specific reproduction instructions (e.g. eliminate UBI if 
possible, or else explain how to set up UBI)?

-Scott