Question I have your X7DBE motherboard with the LSI SAS3080X controller card and am running Linux OS Kernel 2.6.16 on it. My problem is that whenever I run the disk I/O test, I receive the message below. Have you seen this error before and do you have any workaround solution for this? mptbase:ioc 0 : warning- unexpected doorbell active ! CPU1: Machine Check Exception: 0000000000000005 Bank 0: b200 0040 1000 0400 Bank 5: b200 1210 2008 0400 Kernel Panic – Not Syncing : CPU Context Corrupt Answer If you are using the LSI SAS3080X card, you need to set the PCI-e I/O Performance to “Coalesce” instead of “Payload 256B” in BIOS -> Advanced -> PCI Configuration. That will fix your problem. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) A L F 4 FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 5808 Storage: - SAS 01/19/07 BT     Print Answer