On Sun, 16 Nov 2008, Richard Elling wrote: > > Let's do some math. A generally accepted Soft Error Rate (SER) for > DRAMs is > 1,000 FITs or an Annualized Failure Rate (AFR) of 0.88%. If a non-ECC DIMM > has 8 chips then your AFR is 7%, or 14% for 16 chip DIMMs. My desktop > has 4 DIMMs at 16-chips each, so I should expect an AFR of 56%. Since these > are soft errors, a RAM test program may not detect it.
This does not consider the possibility of a motherboard problem. In my case, a partial motherboard failure caused many ECC events. It was as if a couple of DIMMs were failing. Solaris/ECC did the right thing to isolate the failing parts so I was not aware of the problem at all except for a fault report. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
