Неисправная память или контроллер?

У меня проблема с Dell PowerEdge R420 на CentOS 6 с 6 * 8 ГБ ОЗУ.

Я начал видеть:

Nov  9 16:43:45 hostname kernel: [20343924.149151] sbridge: HANDLING MCE MEMORY ERROR
Nov  9 16:43:45 hostname kernel: [20343924.149156] CPU 0: Machine Check Exception: 0 Bank 9: cc00008c000800c1
Nov  9 16:43:45 hostname kernel: [20343924.149160] TSC 0 ADDR 421c11000 MISC 90024f4dae6988c PROCESSOR 0:206d7 TIME 1478727825 SOCKET 0 APIC 0
[...]

Nov  9 16:43:46 hostname kernel: [20343925.090225] EDAC sbridge: Lost 6 memory errors
Nov  9 16:43:46 hostname kernel: [20343925.090369] EDAC MC0: CE row 2, channel 0, label "CPU_SrcID#0_Channel#3_DIMM#0": 2 Unknown error(s): memory scrubbing on FATAL area OVERFLOW: cpu=0 Err=0008:00c1 (ch=1), addr = 0x421c0c000 => socket=0, Channel=3(mask=8), rank=0
Nov  9 16:43:46 hostname kernel: [20343925.090373]
[...] It repeats multiple time for row 0 and 1 as well.

Это заставляет меня думать, что DIMM памяти неисправен, а скорее контроллер. Вероятность того, что все 3 модуля DIMM на одном контроллере неисправны, но нет ни одного на другом, маловероятна.

$ 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_Channel#1_DIMM#0: 754182 Corrected Errors
mc0: csrow1: 0 Uncorrected Errors
mc0: csrow1: CPU_SrcID#0_Channel#2_DIMM#0: 7181 Corrected Errors
mc0: csrow2: 0 Uncorrected Errors
mc0: csrow2: CPU_SrcID#0_Channel#3_DIMM#0: 16891 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_Channel#1_DIMM#0: 0 Corrected Errors
mc1: csrow1: 0 Uncorrected Errors
mc1: csrow1: CPU_SrcID#1_Channel#2_DIMM#0: 0 Corrected Errors
mc1: csrow2: 0 Uncorrected Errors
mc1: csrow2: CPU_SrcID#1_Channel#3_DIMM#0: 0 Corrected Errors

Кто-нибудь может подтвердить проблему? Что я могу сделать ? Если действительно умирают модули DIMM, как я могу узнать, какой именно?

*-memory
      description: System Memory
      physical id: 1000
      slot: System board or motherboard
      size: 48GiB
    *-bank:0
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 0
         serial: 3067A18C
         slot: DIMM_A1
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)
    *-bank:1
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 1
         serial: 30679E65
         slot: DIMM_A2
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)
    *-bank:2
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 2
         serial: 30679E66
         slot: DIMM_A3
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)

   *-bank:6
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 6
         serial: 30679E63
         slot: DIMM_B1
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)
    *-bank:7
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 7
         serial: 30679CF1
         slot: DIMM_B2
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)
    *-bank:8
         description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 36KSF1G72PZ-1G4M1
         vendor: 002C04B3002C
         physical id: 8
         serial: 30679CEF
         slot: DIMM_B3
         size: 8GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)