Hitachi Compute Blade 2000 User Manual page 188

 About Boot Paths (Legacy Boot and EFI Boot)
Boot paths are categorized into two boot modes in the Compute Blade 2000. The
implemented boot processing depends on which mode you select.
The two Compute Blade 2000 boot modes are:
 Legacy booting (conventional mode and boot method)
 EFI booting (newly supported mode and boot method)
The boot mode is determined automatically according to the boot device selected as
Boot Option #1.
When Built-in Shell or UEFI:xxxxx is selected as Boot Option #1, EFI booting applies
and the legacy boot path will be ignored.
Note that when a boot device other than Built-in Shell or UEFI:xxxxx is selected as
Boot Option #1, the EFI boot path will be ignored.
137