Hitachi CB 520H B1 Service Manual page 436

Confirming and updating firmware version for CB 540A B1,
CB 520H B2/B3/B4, CB 520X B1/B2/B3
Firmware earlier than shown below does not support Changing LOM
configuration. Before changing LOM configuration procedure, you need to
confirm firmware version. If firmware versions are earlier than shown below,
you need to update firmware version shown below or later.
On the other hand, if you want to backdate firmware earlier than shown
below, you need to enable LOM according to
10-8" section before backdate firmware.
Table 10-2 Firmware versions available for changing LOM configuration
Server blade
CB 540A B1
CB 520H B2
CB 520H B3
10-4
BMC, EFI
03-14 or later
04-30 or later
08-05 or later
Change LOM configuration
Hitachi Compute Blade 500 Series System Service Manual
"How to enable LOM. on page
Firmware
Management module
A0145 or later
A0205 or later
A0235 or later