Switching to Legacy on a SuperMicro
To switch the boot mode from UEFI back to BIOS (Legacy mode), you can use the IPMI interface, or you can work when directly connected to the server.
Install Java applet
Decide if you want to use the IPMI management console, or if you plan to connect directly to the server. If you want to use the console, decide if you want to use the Java remote console applet to access the console, or if you want to use HTML5.
If you want to use the Java remote console applet, you might need to install it. See Step 1: Install Java applet.
Change the mode to BIOS
This procedure is nearly identical to the procedure for switching to UEFI. You change
the same fields on the Setup Utility screen, but you
specify either Legacy or Disabled.
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From the IPMI management console, sign in to the server as the elemental user.
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Reboot the system:
[elemental@hostname sudo rebootThe system starts to reboot. The window size might change as the system is rebooting.
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While the system is rebooting, repeatedly press the Delete key on the keyboard (or the del button on the virtual keyboard). The Setup Utility screen appears.
You can use these keys to work on the screen:
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The arrow keys
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Enter to select
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ESC to return to the previous screen.
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On the main menu, choose Advanced.
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In sSATA Configuration, change the following line to Legacy:
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sSATA RAID Option ROM/UEFI Driver
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In PCIe/PCI/PnP Configuration, change the following lines to Legacy:
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AOC-URN2-14GXS-SLOT1 PCI-E 3.0 X8 OPROM
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RSC-RIUW-EBR SLOT1 PCI-E X8 OPROM
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RSC-RIUW-2E16 SLOT1 PCI-E X16 OPROM
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RSC-RIUW-2E16 SLOT2 PCI-E X16 OPROM
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Onboard LAN OPROM Type
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Onboard Video OPROM
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Still in PCIe/PCI/PnP Configuration, change the following lines to Disabled:
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Onboard LAN NVMe1 OPROM
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Onboard LAN NVMe2 OPROM
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Select F4. On the Save & Exit dialog, choose Yes.
