This is actually old news and is one of those you won’t believe it until you try it kind of tips. It occurred to me to post this tip when I was creating the bootable floppies to flash the HBA and TOE cards.
Believe it or not, IBM Blade Centers (and most IBM servers these days) will not boot to an NEC USB Floppy. In order to boot to a floppy, it has to be a TEAC floppy disk drive. For whatever reason, the NEC drive doesn’t pick up as a boot device and the system will by-pass it.

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