群晖 NAS 扩容 ECC 内存

众所周知，群晖是卖软件的，买系统送硬件，金贵的内存和磁盘再也不是苹果的专属了。

新购入的群晖 DS1522+ 只有单条 8G 群晖原装内存，为长久使用考虑，购买了两条三星 DDR4 ECC @2666 8G 内存，为了防止兼容性问题，直接将原装内存也替换掉，拆机时才发现自带的内存是 3200 频率的，算了，以后升级再说吧。

开启终端

首先需要在设置中允许终端连接

然后使用终端连接进去，切换为根用户，使用 dmidecode 命令查询内存状态。

kane@Synology:/$ sudo -i

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

Password: 
root@Synology:~# dmidecode -t memory
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.1.1 present.

Handle 0x001E, DMI type 16, 23 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: Multi-bit ECC
    Maximum Capacity: 64 GB
    Error Information Handle: 0x0021
    Number Of Devices: 2

Handle 0x001F, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x001E
    Error Information Handle: 0x0022
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 8192 MB
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL A
    Type: DDR4
    Type Detail: Synchronous Unbuffered (Unregistered)
    Speed: 3200 MT/s
    Manufacturer: A-DATA Technology
    Serial Number: A42F0100
    Asset Tag: Not Specified
    Part Number: AD4B320038G22-BSSC  
    Rank: 1
    Configured Memory Speed: 2400 MT/s
    Minimum Voltage: 1.2 V
    Maximum Voltage: 1.2 V
    Configured Voltage: 1.2 V

Handle 0x0020, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x001E
    Error Information Handle: 0x0023
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: Unknown
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL B
    Type: Unknown
    Type Detail: Unknown
    Speed: Unknown
    Manufacturer: 0000
    Serial Number: Unknown
    Asset Tag: Not Specified
    Part Number: Unknown
    Rank: Unknown
    Configured Memory Speed: Unknown
    Minimum Voltage: Unknown
    Maximum Voltage: Unknown
    Configured Voltage: Unknown

更换内存

拆机视频可以参考

实际上拆机一半才发现，内存插槽在硬盘槽右边位置，并不需要拆机，只需要小心打开插槽更换内存即可。

完成

更换内存后，重新开机，引导一切正常，再次查看内存信息。

# dmidecode -t memory
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.1.1 present.

Handle 0x001E, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: Multi-bit ECC ## 这里说明已经开启 ECC 错误校验
        Maximum Capacity: 64 GB              ## 最大支持 64G 即单条 32G
        Error Information Handle: 0x0021
        Number Of Devices: 2                 ## 最多支持双通道

Handle 0x001F, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: 0x0022
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 8192 MB                        ## 容量
        Form Factor: SODIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: P0 CHANNEL A
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2667 MT/s                     ## 内存运行速率，可以看到降低为 2666MT/s
        Manufacturer: Samsung
        Serial Number: 021A764A
        Asset Tag: Not Specified
        Part Number: M474A1K43DB1-CTD    
        Rank: 1
        Configured Memory Speed: 2400 MT/s
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Handle 0x0020, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x001E
        Error Information Handle: 0x0023
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: SODIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: P0 CHANNEL B
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2667 MT/s
        Manufacturer: Samsung
        Serial Number: 021A7551
        Asset Tag: Not Specified
        Part Number: M474A1K43DB1-CTD    
        Rank: 1
        Configured Memory Speed: 2400 MT/s
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

不过问题不大，3200 频率降低到 2666 确实会损失一些读写速度，不过并不重要，等以后有机会再升级吧。

附上一个定妆照：