The issue is due to how the default BIOS setup on the IBM Blade handles the presented LUNs.
In case of ESXi embedded the USB key containing the boot bank can have its drive ID changed while the system is not completely booted, making it impossible for the hypervisor loader to find its boot banks.
The issue is resolved by modifying the host BIOS setting Adapter Option ROM Support and disabling devices from which the host is not supposed to boot.
For example:
- Boot to <F1> Setup.
- Click Load Default Settings.
- Save settings.
- Press Enter.
- Click System Settings.
- Select Devices and I/O Ports.
- Enable/Disable ADAPTER OPTION ROM SUPPORT.
- Enable/Disable UEFI Option ROM(s).
Note: This issue may be resolved after disabling the Planar SAS option within ADAPTER OPTION ROM SUPPORT.