Intel Microcode Updates

[spetrillo]

Hello all,

When I built my last PVE server I updated the Intel microcode. I had to rebuild it over the weekend, and knowing the microcode update was already completed, I just validated it. It came back as thought the microcode update was not done. I am now officially confused. Are the microcode updates not permanent?

Thanks,
Steve

 

[MarkusKo]

no, microcode updates are applied to the cpu by the kernel on system boot but they have to be installed on the os first - they are more like a device driver and try to fix cpu issues on the os / kernel level (simplified).

if you reinstall your os you have to reinstall the microcode packages.

bios / uefi updates are written to the mainboard chip and are permanent. they have fixes for cpu issues too.

 

[spetrillo]

Thank you for clarifying this!