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是记忆缺陷还是有其他可能？

tag-icon • tag-icon memory
是记忆缺陷还是有其他可能？

我有一台运行的服务器，无需物理访问。我认为安装了 16Gb 内存，但我不确定。这里可能有什么问题？

#dmidecode -t memory
# dmidecode 3.0
Scanning /dev/mem for entry point.
SMBIOS 2.6 present.

Handle 0x0014, DMI type 16, 15 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: Single-bit ECC
    Maximum Capacity: 8 GB
    Error Information Handle: Not Provided
    Number Of Devices: 2

Handle 0x0016, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x0014
    Error Information Handle: Not Provided
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 8192 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM0
    Bank Locator: BANK0
    Type: Other
    Type Detail: Synchronous
    Speed: 1333 MHz
    Manufacturer: Manufacturer00
    Serial Number: SerNum00
    Asset Tag: Not Specified
    Part Number: ModulePartNumber00
    Rank: Unknown

Handle 0x0018, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x0014
    Error Information Handle: Not Provided
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 8192 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM1
    Bank Locator: BANK1
    Type: Other
    Type Detail: Synchronous
    Speed: 1333 MHz
    Manufacturer: Manufacturer01
    Serial Number: SerNum01
    Asset Tag: Not Specified
    Part Number: ModulePartNumber01
    Rank: Unknown

但还有这样的：

# free
              total        used        free      shared  buff/cache   available
Mem:        7881812      236436      237512        8736     7407864     7233756

删除并读取内存后，CentOS 现在再次使用 16Gb：

              total        used        free      shared  buff/cache   available
Mem:       16139344      293560    15629068        8708      216716    15548680

dmidecode 仍然说Maximum Capacity: 8 GB。

令我恼火的是，内存条总是被识别但一开始就没有被使用。

任何想法？

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