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Questions tagged [efi]

EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack.

EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack. It was originally developed by Intel, and development ceased in 2005 when Intel contributed it to the Unified EFI Forum, which developed and develops the Unified Extensible Firmware Interface.

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How do I mount the EFI partition on Windows 8.1 so that it is readable and writeable?

Here is what I do: restart machine with Windows 8.1 determine "EFI System" partition with the Disk Management utility run command prompt as administrator type diskpart type select disk 0 then select partition 2 then assign open windows explorer…
RyanTM
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Is there a list of available boot-args for darwin / OS X

In OS X you can set boot parameters with nvram boot-args=[options] Where the options I know about -v (verbose) -x (safe mode) and arch=x86_64 (boot into 64 bit kernel on 64 bit capable machines). Are there any others? There doesn't seem to be any…
stib
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How do I remove an EFI System partition from a drive in Windows 7?

I have an external HD which used to be my TimeMachine drive. I got a different drive for that, so I want the original drive back as an external on my Windows box, but it has this random 200 MB partition labeled as EFI System Partition. How do I get…
Daniel Huckstep
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How to delete OS from boot menu

After installing fedora and Centos and other OS now I have them all showing in my Boot menu [F2] on start up not the menu form the OS even after deleting them and reinstaling other OS - Ubuntu -so It just shows one when the OS starts but when I go…
Talal
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How to hide EFI-partition?

For some sort of reason my EFI-partition shows up in disk management as well as This PC. Is there a way to hide again without messing up my system? Preferably by command line (diskpart).
CosmicHusky
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How to know if my BIOS supports UEFI?

I recently bought a new Dell notebook for my girlfriend and I want to know if the computer comes with a UEFI BIOS, unfortunately I didnt find any information in the manual or on Windows, is there some way to discover it?
Diogo
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Create EFI partition before installing Windows 10

I'm currently using a dual boot setup on my laptop, with Windows 10 and Fedora and I'm planning to replace my HDD with an SSD for obvious reasons. I'll make a clean installation of both OS, but I've got a doubt regarding the EFI partition: since…
Lolu
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What hardware device used to eat up 1.4GB of my 4GB RAM, and now suddenly after no hardware changes eats up 2.2GB?

This is more or less a continuation of What hardware device eats up 1.4GB of my 4GB RAM? While I have more or less accepted the solution there that for some mysterious reason, after a BIOS upgrade my graphics adapter suddenly reserved 1.4GB of…
mihi
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Can I delete the 'EFI System Partition' without harming other data on the drive?

I have three external HDDs in a USB enclosure. After a recent upgrade to Windows 7, during which these three drives were actually installed inside the PC tower, two of the three drives now have a 200 MB EFI partition, and the two drives do not show…
Andy
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What is the EFI shell?

My BIOS offers me the option to launch an EFI shell, but I have no idea what that is. Does it allow me to turn on CPU flags like VT-x or something similar? Why would I want to use it?
Flame_Phoenix
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Tools to modify UEFI Variables in Windows/Linux?

I have a DELL machine that use Phoenix SecureCore Tiano as its UEFI/BIOS However, it is totally not configurable as its UEFI shell & menus are hidden in BIOS Setup. I'm wondering if there were tools that can modify the UEFI settings(such as Boot…
marstone
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How can I reboot or shutdown the system in an EFI or UEFI shell?

Having consulted resources related to the commands available in a UEFI/EFI shell, I cannot find two commands I would expect to be available: reboot poweroff, halt, or shutdown What am I missing here? (can it be that the EFI shell is somewhat…
fraleone
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How to get rEFInd working with FileVault 2 on OSX 10.8

I installed rEFInd on my new Macbook Air which I planned on using to do a dual boot to Linux, but prior to installing Linux, I decided to encrypt my drive. I knew I was going to do this, so I had already installed rEFInd with the --esp option. When…
David
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How can I add a BCD Boot Entry for Linux in Windows Boot Manager in EFI?

I have a Windows 10 Laptop booting in EFI mode. I currently have Windows 10 and Linux Mint installed. I want to be able to boot into Linux mint from Windows Boot Manager. The thing is, I kind of deleted the Boot Entry for it, because it wasn't…
ZeroSkill
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How to get out of EFI shell in virtual box

I am running a virtual machine for Mac OSX and it always boots into EFI shell, I just want a simple explanation of what this is and how, if possible, to exit it.
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