(Error code 2c2220)
This error originated from one of the following locations within the iPXE source code:
DEBUG=efi_block(Please edit this page to include any of your own useful hints and tips for fixing this error.)
If you are trying to boot first local disk with sanboot –no-describe –drive 0x80 it will fail due to disks not being mapped to legacy device ids. Recommended solution for this is to use exit 1 instead which should return error to EFI firmware so that it should try to boot next-device instead.