How to verify and keep record of replacement performed on node

To verify if we have replaced DIMM on correct slot and CPU we can use the following method 

We can look at hardware.history file which records any replacement for example DIMM,SSD,HDD,NIC being made to that node. This file remains local to each CVM

1. After we replace DIMM we will boot the host up

2. Power on CVM and run following command

ncc hardware_info update_hardware_info

           This will update the hardware.history file present in ~/config directory and it will recognize any new replacement

3. Open hardware.history using less

less ~/config/hardware.history

4. Go to last line by pressing shift+g

5. Check out the most recent replacement it should look something like this

Mon, 05 Oct 2020 15:37:01 CDT|Component changed: Memory module{locator:P1-DIMMC1} Old values: |{serial_number: 423D07AF}|(Last Detected Mon, 05 Oct 2020 10:13:25 CDT) New values: |{serial_number: 152057A5}

6. It mentions DIMM P1-DIMMC1 was replaced and its serial number is changed from 423D07AF to 152057A5

This is a quick and easy way for verifying any replacements.

For further details please refer to the following article

NCC Hardware Info

NX Hardware [Memory]