Can an ESXi host boot from an SD if it has more than 512GB of memory

[juchestyle]

Hey guys and gals,

Our architecture guru asked the above question.  I have never ran into this in either theory or real world.  I googled it and couldn't find any reference.  Does anyone have any insight into this, and can provide a link?  Here is the exact question:

"I just saw something in one of the VMWare training courses that says once an ESXi host goes over 512GB of memory it can no longer boot from an SD device … only from a physical drive or a SATADOM device.  Have you guys ever heard of this kind of limitation or know if it applies to our current version of ESXi?"

Thank you in advance!

[daphnissov]

That limitation only applies when running vSAN, and there only because the vSAN trace files can overwhelm smaller disks. If you're not using vSAN then there's no such limitation.

[juchestyle]

Do you have a link to this?

[daphnissov]

Hardware Requirements for Virtual SAN

Virtual SAN Considerations When Booting from a Flash Device - Virtual Blocks