After update from centos 6.6 to centos 6.7 and reboot it, I have get a lot of this error into /var/log/messages: > May 3 11:27:20 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=6093 CAS=896, CE Err=0x10000 > (Correctable Patrol Data ECC)) > May 3 11:27:21 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=1 RDWR=Read RAS=1330 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:22 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=2673 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:23 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=1335 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:24 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=1335 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:25 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=240 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:26 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=3 RDWR=Read RAS=1796 CAS=900, CE Err=0x10000 > (Correctable Patrol Data ECC)) > May 3 11:27:27 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=3 RDWR=Read RAS=1337 CAS=4, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:28 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=3 RDWR=Read RAS=3094 CAS=900, CE Err=0x10000 > (Correctable Patrol Data ECC)) > May 3 11:27:29 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=3 RDWR=Read RAS=240 CAS=6, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) > May 3 11:27:30 s-virt kernel: EDAC MC0: CE row 2, channel 1, label > "": (Branch=0 DRAM-Bank=3 RDWR=Read RAS=240 CAS=6, CE Err=0x2000 > (Correctable Non-Mirrored Demand Data ECC)) I have "yum install edac-utils -y" and I have get this output: > [root at s-virt ~]# edac-util -v > mc0: 0 Uncorrected Errors with no DIMM info > mc0: 0 Corrected Errors with no DIMM info > mc0: csrow0: 0 Uncorrected Errors > mc0: csrow0: ch0: 0 Corrected Errors > mc0: csrow0: ch1: 0 Corrected Errors > mc0: csrow0: ch2: 0 Corrected Errors > mc0: csrow0: ch3: 0 Corrected Errors > mc0: csrow1: 0 Uncorrected Errors > mc0: csrow1: ch0: 0 Corrected Errors > mc0: csrow1: ch1: 0 Corrected Errors > mc0: csrow1: ch2: 0 Corrected Errors > mc0: csrow1: ch3: 0 Corrected Errors > mc0: csrow2: 0 Uncorrected Errors > mc0: csrow2: ch0: 0 Corrected Errors > mc0: csrow2: ch1: 80384 Corrected Errors > mc0: csrow2: ch2: 0 Corrected Errors > mc0: csrow2: ch3: 0 Corrected Errors > mc0: csrow3: 0 Uncorrected Errors > mc0: csrow3: ch0: 0 Corrected Errors > mc0: csrow3: ch1: 8 Corrected Errors > mc0: csrow3: ch2: 0 Corrected Errors > mc0: csrow3: ch3: 0 Corrected Errors The server is a: > [root at s-virt ~]# lshw > s-virt.dom.it > description: Tower Computer > product: ProLiant ML370 G5 (433752-421) > vendor: HP > serial: GBxxxxxxxM > width: 64 bits > capabilities: smbios-2.4 dmi-2.4 vsyscall64 vsyscall32 > configuration: boot=hardware-failure-fw chassis=tower > family=ProLiant sku=433752-421 uuid=34333337-3532-4742-3837- > 35303557534D with this RAM installed: > [root at s-virt ~]# dmidecode -t memory|grep Size > Size: 1024 MB > Size: 2048 MB > Size: No Module Installed > Size: No Module Installed > Size: 1024 MB > Size: 2048 MB > Size: No Module Installed > Size: No Module Installed > Size: 1024 MB > Size: 4096 MB > Size: No Module Installed > Size: No Module Installed > Size: 1024 MB > Size: 4096 MB > Size: No Module Installed > Size: No Module Installed I'm not a hardware guru and I do not know "decrypt" log and output commands messages What is the problem signaled into log? What I must to do ? Many thanks for your help. -- Dario Lesca (inviato dal mio Linux Fedora 23 Workstation)