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Can I boot ESXi from an SD card while placing OSDATA on my SAN?

Duncan Epping · Nov 16, 2021 · 1 Comment

I see this question popping up all the time, literally twice a day on our VMware internal slack, can I boot ESXi from an SD card while placing OSDATA on my SAN? I guess people are confused after reading this article. It is probably a result of skim-reading as the article is in-depth and spells it out to the letter. If you look at the following table then it mentions FCoE and iSCSI:

However, FCoE, iSCSI, and FC would only be supported when you boot from SAN, only then is OSDATA supported on a SAN device. When you boot from USB/SD, OSDATA will need to reside on a locally attached device. In other words, the answer to the original question is: no you cannot boot ESXi from an SD card and place OSDATA on your SAN. Again, for details, read this excellent document.

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About the author

Duncan Epping is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is a VCDX (# 007), the author of the "vSAN Deep Dive", the “vSphere Clustering Technical Deep Dive” series, and the host of the "Unexplored Territory" podcast.

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