Before you consider how to set up your ESX host for booting from a SAN, decide whether it makes sense for your environment.

Boot from a SAN:

If you do not want to handle maintenance of local storage.

When you need easy cloning of service consoles.

In diskless hardware configurations, such as on some blade systems.

Do not boot from a SAN if you risk I/O contention between the service console and VMkernel.