UCS Unable to boot from SAN

[dustinlally]

I have some blades that I'm unable to boot from SAN.  The weird thing is I can see the LUN's and I can install ESXi 5.5 fine.  It's up until I reboot and the blades just boot to the BIOS because they don't see any disk.  When I try to change boot order, the only thing I can boot to is UEFI.  

[Clifford Aldan]

What is your topology from UCS to SAN array? 

What is the UCS firmware? 

What is the server model used? 

What is the network adapter used? 

What type of Boot from SAN is it (FC, FCOE, iSCSI)?

[Walter Dey]

When you see your lun, and can install ESXi, it means, that

- your zoning is correct

- your lun masking / mapping is correct

If boot fails, your boot policy is the problem ! are you sure, that the target pwwn points to the controller of the disksubsystem, that the lun nr. is correct ? we seen all kind of weird things, like cable crossed,.....