The following error messages are displayed during the boot up process and it hangs in the middle of it:
Error Message 1
A system restart is required.
The system detected an exception during the UEFI pre-boot environment.
Type: Invalid opcode (06) Source: Software (UEFI0004)
Error Message 2
Avago EFI SAS Driver: Unhealthy status reported by this UEFI driver without specific error message(s). UEFI0116: One or more boot drives have reported issue(s). Check the Driver health menu in boot manager for details.
Based on the hardware OEM vendor documentation related to the error code UEFI0004 and CPU Exception Type 0x06: Invalid Opcode (Software) this could happen due to several reasons, but on this specific issue the BIOS Boot mode was set to BIOS as expected on the DL Appliance by default, so the next items to discard on the list are the ones listed below on Recommended Response Action.
Severity 1 (Critical)