我认为我的服务器中有一个内存出现错误，我想知道如何找到它是哪一个。
服务器型号：Supermicro 6072R-EN3RFT
内存：128 GB
安装了最新更新的 CentOS 7
mcelog 内容如下：
:[ 883.230897] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
:[ 883.230904] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 10: cc0001c7000800c1
:[ 883.230906] EDAC sbridge MC0: TSC 0
:[ 883.230908] EDAC sbridge MC0: ADDR b71b18000
:[ 883.230909] EDAC sbridge MC0: MISC 908401000200e8c
:[ 883.504829] EDAC sbridge MC0: PROCESSOR 0:306e4 TIME 1469612575 SOCKET 0 APIC 0
:[ 883.504841] mce: [Hardware Error]: Machine check events logged
:[ 883.606151] EDAC MC0: 7 CE memory scrubbing error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0xb71b18 offset:0x0 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0008:00c1 socket:0 ha:0 channel_mask:1 rank:1)
:[ 899.306134] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
:[ 899.306143] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 10: cc000207000800c1
:[ 899.306145] EDAC sbridge MC0: TSC 0
:[ 899.306148] EDAC sbridge MC0: ADDR c71b19000
:[ 899.306150] EDAC sbridge MC0: MISC 908410000200e8c
:[ 899.306153] EDAC sbridge MC0: PROCESSOR 0:306e4 TIME 1469612590 SOCKET 0 APIC 0
:[ 899.306172] mce: [Hardware Error]: Machine check events logged
:[ 899.644814] EDAC MC0: 8 CE memory scrubbing error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0xc71b19 offset:0x0 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0008:00c1 socket:0 ha:0 channel_mask:1 rank:1)
:[ 901.190512] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1
:[ 901.190528] {1}[Hardware Error]: It has been corrected by h/w and requires no further action
:[ 901.190533] {1}[Hardware Error]: event severity: corrected
:[ 901.190538] {1}[Hardware Error]: Error 0, type: corrected
:[ 901.190541] {1}[Hardware Error]: fru_text: CorrectedErr
:[ 901.190546] {1}[Hardware Error]: section_type: memory error
:[ 901.190549] [Firmware Warn]: error section length is too small
:[ 4916.540282] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
:[ 4916.540290] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 10: cc000287000800c1
:[ 4916.540292] EDAC sbridge MC0: TSC 0
:[ 4916.540294] EDAC sbridge MC0: ADDR b743ff000
:[ 4916.540296] EDAC sbridge MC0: MISC 908400800240e8c
:[ 4916.540298] EDAC sbridge MC0: PROCESSOR 0:306e4 TIME 1469616606 SOCKET 0 APIC 0
:[ 4916.540313] mce: [Hardware Error]: Machine check events logged
:[ 4916.540340] EDAC MC0: 10 CE memory scrubbing error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0xb743ff offset:0x0 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0008:00c1 socket:0 ha:0 channel_mask:1 rank:1)
我尝试了以下操作：
grep "[0-9]" /sys/devices/system/edac/mc/mc*/csrow*/ch*_ce_count
/sys/devices/system/edac/mc/mc0/csrow0/ch0_ce_count:669
/sys/devices/system/edac/mc/mc0/csrow0/ch1_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow0/ch2_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow0/ch3_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow0/ch0_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow0/ch1_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow0/ch2_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow0/ch3_ce_count:0
这是否意味着我有 8 个插槽，每个插槽有 16 GB，而第一个插槽包含有错误的内存？
你知道哪一个内存模块有错误吗？我不是系统管理员，所以我真的不知道该怎么做……
亲切的问候
答案1
我认为您的 DIMM 插槽可能标有BANK A DIMM 0、BANK A DIMM 1等，最多BANK B DIMM 3。您可以假设这BANK A DIMM 0是问题所在，然后尝试将其与其他 7 个插槽中的一个交换（假设它们都相同），然后重复测试，直到再次生成错误。如果不同的/sys/devices/system/edac/mc/mc?/csrow0/ch?_ce_count计数器增加，那么您可以相当肯定您已经找到了问题 DIMM。
答案2
这就是您为查找并查明问题所做的事情。
实用程序名称：edac-utils
就我而言，我在 CentOS7 上安装，您可以找到适用于其他版本和版本的实用程序。
yum install edac-utils
干得好。
[root@centos7 ~]# 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: CPU_SrcID#0_Ha#0_Chan#1_DIMM#0: 2187 Corrected Errors
mc0: csrow0: CPU_SrcID#0_Ha#0_Chan#2_DIMM#0: 0 Corrected Errors
mc0: csrow1: 0 Uncorrected Errors
mc0: csrow1: CPU_SrcID#0_Ha#0_Chan#1_DIMM#1: 24464678 Corrected Errors
mc0: csrow1: CPU_SrcID#0_Ha#0_Chan#2_DIMM#1: 3874265 Corrected Errors
mc1: 0 Uncorrected Errors with no DIMM info
mc1: 0 Corrected Errors with no DIMM info
mc1: csrow0: 0 Uncorrected Errors
mc1: csrow0: CPU_SrcID#1_Ha#0_Chan#1_DIMM#0: 0 Corrected Errors
mc1: csrow0: CPU_SrcID#1_Ha#0_Chan#2_DIMM#0: 0 Corrected Errors
mc1: csrow1: 0 Uncorrected Errors
mc1: csrow1: CPU_SrcID#1_Ha#0_Chan#1_DIMM#1: 0 Corrected Errors
mc1: csrow1: CPU_SrcID#1_Ha#0_Chan#2_DIMM#1: 0 Corrected Errors
上述结果与以下结果相符：
[root@centos7 ~]# grep "[0-9]" /sys/devices/system/edac/mc/mc*/csrow*/ch*_ce_count
/sys/devices/system/edac/mc/mc0/csrow0/ch1_ce_count:2187
/sys/devices/system/edac/mc/mc0/csrow0/ch2_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow1/ch1_ce_count:24464678
/sys/devices/system/edac/mc/mc0/csrow1/ch2_ce_count:3874265
/sys/devices/system/edac/mc/mc1/csrow0/ch1_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow0/ch2_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow1/ch1_ce_count:0
/sys/devices/system/edac/mc/mc1/csrow1/ch2_ce_count:0