So on my Supermicro X9SCM-iF motherboard I have an option for boot from the Sandisk USB Key internally or UEFI boot internally from the Sandisk USB key. I have chose normal boot from the key and disabled the others, does UEFI boot work with unRAID 5.05 and if so what advantages or disadvantages does it have?

 

Thanks

Based on my experience, if you selected the "UEFI [Flash Drive Name]" version presented to you your system just would not boot.  That is what mine did.  so I went back into the BIOS, selected the non-UEFI version and all was well.

 

My shallow research told me that for UEFI boot to work we'd need an updated, and appropriately configured, syslinux.  But there is little to no benefit to UEFI that I can tell in our case so I'm not surprised Tom hasn't jumped on it. I think an updated syslinux might help with some USB compatibility problems I was having (hence why I started the research) but I solved it by using a different USB stick.  I also couldn't be sure it wasn't the MB's fault anyway so I stopped trying to update syslinux myself (I failed miserably)

Thats really useful, thanks for taking the time to respond to my question.