CISCO UCS C240 M4 12LFF SD card slots on motherboard

Askingslushy · April 9

What are the Use cases for these sd card slots?

Lurick · April 9

They are for boot media, mainly ESXi before that was depreciated a while back on the ESXi side.

It can still be used for other boot media though.

Askingslushy · April 9

Any other use cases if it is an unraid server where i'm using a usb drive?

leadeater · April 9

USB and SD card are interchangeable here, they are functionally the same. The only thing to be careful of is the quality of the SD card but that also applies to USB drives. High failure rates is why ESXi stopped supporting both USB and SD card.

Still a good home lab option for unRAID OS or even Linux, just have a plan for when it fails because it's not an if since it will.

Needfuldoer · April 10

If you use SD cards as boot media, a least use the "high endurance" kind marketed for dashcams and get much higher capacity than you need. Run both slots in a mirrored configuration.