How do I identify Linux server ECC memory modules from a shell prompt?
You need to count the chips on the module. If memory module has 9 chips per sides, it is ECC memory (EDAC protected memory). It may or may not be registered. If the memory module has 8 chips per side, it is not ECC memory modules.
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You can get this information by visiting your BIOS setup menu. Another option is to use dmidecode command to dump bios memory information from a shell prompt:
# dmidecode --type 16
# dmidecode 2.11
SMBIOS 2.5 present.
Handle 0x0016, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Single-bit ECC
Maximum Capacity: 64 GB
Error Information Handle: Not Provided
Number Of Devices: 8
To see memory speed and other information, enter:
# dmidecode --type memory
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3 comment
You can run the command dmidecode (e.g. to be found in package kernel-utils on RedHat based distibutions), and it will give you a bunch of BIOS related information including your installed memory.
Have you ever tried it? :D
Handle 0x0013, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0012
Error Information Handle: No Error
Total Width: 40968 bits
Data Width: 41024 bits
Size: 1024 MB
Form Factor: DIMM
Set: 1
Locator: J6G1
Bank Locator: DIMM 0
Type: DDR2
Type Detail: Synchronous
Speed: 800 MHz
Manufacturer: Kingston
Serial Number: 690CFA80
Asset Tag: 0000072D
Part Number: 4B544331472D5544494D4D00000000000000
Could you please show me which is the chip-count here? :)
For me it works nice:
# dmidecode 2.12
SMBIOS 2.5 present.
Handle 0x0026, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Single-bit ECC
Maximum Capacity: 16 GB
Error Information Handle: Not Provided
Number Of Devices: 2