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Questions tagged [uefi]

Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware (BIOS)

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Could `rm -rf / --no-preserve-root` mess up the bios?

In order to see approximate speeds for tarballing an entire system, and then restoring that system when if it was foobar'd, I partially cloned one of our primary systems onto a workstation that, while not integral to our company systems, would be…
MirroredFate
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How do I convert my linux disk from MBR to GPT with UEFI?

I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
Chris Jones
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USB drive not detected in Intel EFI shell

I must update an Intel S3420GPLC board. BIOS, BMC, FRU / SDR, the whole thing. Everything is pretty much automated in the Intel download. You're supposed to boot to the integrated EFI shell, mount the USB disk/key, and launch the startup.nsh script…
Silver Quettier
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Force Windows Server 2008 to use legacy BIOS bootloader instead of EFI

We have UEFI servers and have come across a situation where we need to force Windows Server 2008 to boot via the legacy BIOS method instead of through UEFI. Is there a way to tell Windows Server 2008 (either during install or post-install) to ignore…
MikeyB
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UEFI netboot menu

I have an existing PXE syslinux environment and I'd like to set up a similar EFI-based netboot environment. I'm a big fan of the various menus as seen in the screenshot below and I'd like to find something equivalent. Ideal features would…
MikeyB
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IBM Server takes a long time to boot past UEFI to OS

I have a pair of IBM System x3620 servers. These servers do fine once they finally reach the point where the operating system takes over, but it takes them forever to get past the new-fangled UEFI boot system... a good five minutes or so; maybe…
Joel Coel
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What is the PXE Client System Architecture Type "BC EFI (7)" from RFC 4578?

RFC 4578 defines various machine architectures for PXE as follows: Type Architecture Name ---- ----------------- 0 Intel x86PC 1 NEC/PC98 2 EFI Itanium 3 DEC Alpha 4 Arc x86 5 Intel Lean Client 6 EFI IA32 7 …
MikeyB
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CentOS 7 and Hyper-V

I'm trying to install CentOS 7 using Hyper-V and it's failing with the following error message: tsc: Fast TSC calibration failed PCI: Fatal: No config space access function found i8042: No controller found [long waiting…
Giovanni Tirloni
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How to install Ubuntu Server 12.04 in a Virtualbox VM with UEFI boot enabled

I have a server which I'd like to install Ubuntu 12.04 on, but I've had some problems and thought it would be nice to get things working in a Virtualbox VM with the same features as the server. I want to enable UEFI-boot in the VM. I "Enable EFI" in…
Deleted
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How to perform a P2V conversion of a Windows Server 2008 R2 EFI system?

As discussed elsewhere, Windows Server 2008/R2 will automatically use the EFI boot loader when installed on EFI systems, and will also automatically use the GPT partitioning scheme on such systems. And you can't do anything at all about this (other…
Massimo
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HyperV Linux EFI VHDX migration is missing EFI in the boot options

I have a HyperV 2016 cluster of n machine running on W2k16. I've duplicated the VHDX of a RHEL 7.5 (Gen2) VM that runs with this boot order (and secure boot disabled): After creating a new VM with the cloned disk, the EFI file entry disappeared,…
Lorenzo Brunetti
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GCP: Invalid resource usage: 'UEFI feature is not available for this project.'

I created an image using the --guest-os-features="UEFI_COMPATIBLE" option as described in the documentation but when trying to instantiate an VM Instance (using the Console and gcloud) I get the following error: ERROR:…
Simon Kirsten
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Building uEFI bootable ISO and USB for Windows 7 deployment

I have been trying to build up a window's 7 and 2k8 EFI deployment ISO or USB. But struggling to to even get an ISO to boot from even VMware Workstation EFI implementation. The problem is there is no clear requirement to what the EFI bootloader is…
Darragh
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How to retrieve Serial Number from Windows on new U/EFI box?

I need to retrieve the hardware serial numbers from a set of new HP mini desktops that need provisioning. This worked in the past using a WSH script to query it via WMI. Unfortunately, the newer models no longer contain a BIOS but rather come with…
Gringo Suave
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How much physical RAM is "lost" to BIOS/UEFI?

Browsing the linux kernel output dmesg on 6 different systems (4 server, and for the sake of comparison also 2 laptops) I am shocked by the large amount of BIOS/UEFI reserved RAM Three servers systems have this output 3 x server with 128GiB RAM show…
fraleone
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