OT: Slow booting, was re: Booting an IBM MP 3000 S/390 System - test-drb@ccmp.vtda.org

11 Aug 2015

...
  From: Chuck Guzis 
...
  Could it be that the presence of ECC registered SDRAM
requires that
 every memory location get written before boot-up can proceed? There's
 2GB of the stuff, so that could be the difference. 
I was going to suggest that, actually. Turning on ECC in the memory in a
somewhat older HP minitower machine caused a long delay in booting while it
cleared all the memory.

	Noel