Your ESXi boot configuration must meet specific requirements.
|ESXi system requirements
|Follow vendor recommendations for the server booting from a SAN.
|Configure the adapter, so it can access the boot LUN. See your vendor documentation.
|Multipathing to a boot LUN on active-passive arrays is not supported because the BIOS does not support multipathing and is unable to activate a standby path.
|If the array is not certified for a direct connect topology, the SAN connections must be through a switched topology. If the array is certified for the direct connect topology, the SAN connections can be made directly to the array. Boot from SAN is supported for both switched topology and direct connect topology.
|Hardware- specific considerations
|If you are running an IBM eServer BladeCenter and use boot from SAN, you must disable IDE drives on the blades.