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.

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Can't format pendrive whatever I do. It is not read only pendrive [duplicate]

This is a working pendrive. I can write on the main partition, delete from it. Everything possible can be done. Just can't format it. Formatting tools on OS other than Mac show format complete but ...
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Can't format pendrive whatever I do [duplicate]

I really need help. Even if you are not sure of the solution, please suggest something. I really need it. I formatted a pendrive in macOS using disk utility (GUID, macOS extended journaled). Then I ...
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Clean installation of windows 10 on ssd with EFI, recovery partition

My system have two hard-drive one is SSD for OS and other is HDD for DATA. Currently I am using Windows 10 and Ubuntu on SSD. While creating partition for Ubuntu installation I might have deleted a 10 ...
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I deleted my efi storage and I can't boot up my operating system

I was installing fedora 32 and I deleted my efi storage after that I am unable to boot up my OS and it only shows black screen after I turned on the PC.
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Windows 10 where is the boot partition EFI or MBR

At random, when I booted up my Windows 10 computer recently, it was unable to find the boot disk. This was out of the blue, I had not been having boot problems. In truth, I do not know if I was using ...
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Mount RW access to EFI partition windows 10

How to get RW access to the EFI partition in Windows 10 Enterprise LTSC 1809?
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UEFI Win10 Installation: How do I separate the data and system into different partition?

I would like to separate system partition and data partition in my 1 TB SSD when installing Win10. It was possible in the MBR days, but now, it seemed that Win10 will wipe out the entire SSD during ...
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Unable to delete 3TB external EFI cold storage from MAC

I have an external WD 3TB , i used it for my hackintosh before, now i just want to delete everything in there and use it for my PC desktop, however it does not let me erase the drive completely. My ...
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How to launch built in efi shell?

I have a Lenovo ThinkCenter with American MegaTrends (AMI) UEFI with UEFI shell v2.0.31 I think. From clover bootloader, there is an option to launch the shell and I'm able to enter it. However, from ...
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which EFI record was used for Linux run

I have a two disks (WIn10 and Linux Mint ), both disks have EFI partition but Windows disk EFI contains a records for WIn10 as well as for Mint. How can I check (on running Mint) which EFI was used ...
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Stuck on EFI Interactive Shell with MacOS Catalina x Mid-2009 MacBook Pro

I updated my 2009 MacBook Pro with Catalina Patcher software from DosDude1 and it was working great until I restarted it. When I restarted it was stuck on an EFI window and has remained this way even ...
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System reserved formatted to EFi

I was installing Ubuntu with windows already installed so when i tried to install it on my desired drive it gave an error that no efi file system found so I changed my system reserved disk of windows ...
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Refresh EFI entries that show under efibootmgr

When I type efibootmgr into the terminal I get output that looks a little something like this: 0001 Ubuntu 0002 Windows 1001 Random Partition 1 1002 Random Partition 2 1003 Random Partition 3 Now ...
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Is it possible the boot firmware only runs UEFI on USB but not on hard drives?

I am using a custom (i686) PC for a product development. I have created an EFI image that would boot a kernel using grub2. If I dd the image to a USB drive, plug the drive and then start the machine,...
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upgrade grub tty ncurses prompt trying to install to partition instead of drive, is this right?

I did sudo aptitude full-upgrade -y in tty2 to upgrade. I stopped because I see at the ncurses prompt that aptitude is trying to install to partition instead of drive's MBR, and grub-install always ...
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Remove EFI System Partition & Wipe Drive 0?

Some time ago, installed a bigger SSD (1 TB M.2) to act as my OS boot disk, cloning the original OS-sporting HD (256 GB) onto it and it works fine. Recently, I wanted to try out Linux and installed ...
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How to load MacOS from an APFS partition using GRUB2?

This is a Apple machine, not a Hackintosh. Before Apple switched to APFS, you could put this inside a menu entry in GRUB: set root=(your OS X partition) chainloader /System/Library/CoreServices/boot....
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How can I see my GUID partition table (gpt) physically with hexdump?

With hexdump, I can see the binary content of the master boot record, for example. Similarly, I want to see what my gpt looks like. Is it located in EFI System Partition somewhere? I have only found ...
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How to add EFI GOP driver to platform firmware for use with Secure Boot?

I am trying to insert a GOP driver for the SM750 embedded graphics chip into the platform firmware so that it can be used with secure boot. This is in the form of an .efi file that was given to me by ...
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Intentionally and safely delete Ubuntu directory in EFI partition with Live Ubuntu USB

Situation I want to clean a computer to a near-pristine state with Windows 10 after having tried Ubuntu 18.04 on it. I have all the overall procedure under the belt. The last detail is that the ...
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Windows EFI on an other drive

I tried to do that but Windows still complain and not booting Is there any method to "bind" the EFI partition to a Windows on an other drive ?
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Deleting EFI partition after removing dual-boot CentOS

I installed CentOS 8 yesterday alongside my Windows 10 installation, and I assigned the partitions manually, creating the following: / , /home, /swap, /boot/efi. Unfortunately, I didn't assign enough ...
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efibootmgr ignores increased timeout setting

I have a dual boot system and want to increase the timeout from 1 second to at least 3 seconds I did sudo mount -o rw -t efivarfs efivarfs /sys/firmware/efi/efivars and sudo efibootmgr -t 3 but the ...
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Boot into EFI Shell

I am trying to boot into the EFI shell on my ACER VERITON MG2640G. I have tried the following without success: I have pressed some F-keys when starting the computer. This will open the Windows-Start-...
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EFI Boot via USB Hub and extension cables

I'm not able to EFI boot from USB (3.0) flash drives if they plugged into specific USB periphery. My question is: Are there any requirements to USB-hardware which are necessary in order to boot with ...
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Is it possible to boot a Linux EFISTUB from Windows Boot Manager?

I know that it would be better to install GRUB or some other bootloader, but I would like to have this setup to see if it's even possible. I am using UEFI and not BIOS.
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DUET EFI Boot “BStartart!” Error

Heyo, I've had some trouble with DUET booting recently, and the closest I've ever gotten to installing another distro - but when I start up DUET (this is my only option) I get an error saying "...
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Can a PC show more ways to boot than actually exist?

I was running Windows 10 along with a small partition for Ubuntu on my Acer Aspire (V Nitro) VN7-592G with a Crucial SSD and a Toshiba HDD. I didn't use this partition and erased it some time ago, I ...
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efibootmgr is not selecting the right drive/partition

I have an issue adding an rEFInd entry to my boot list, or to be more precise, I'm able to add it, but it selects the wrong disk (even tho I selected another one with the -d parameter.) Take a look ...
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How can I be able to view/start multiple Win 10 installations from rEFInd?

Due to a much younger brother, I use multiple Windows 10 installations alongside Pop_OS, one of them dedicated to him playing games (most are unable to run in a vm), the problem I have come across is ...
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How to display EFI volume in Explorer? [closed]

I'm still stuck at an error message.
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Partition map issues external WD SSD exfat drive, how can I re-add EFI partition?

Partition map issues external WD SSD exfat drive, how can I re-add EFI partition? this week , partial data disappeared on this external drive . Mac's first aid showed that the partition map had ...
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What Filesystems Are Supported by Lenovo And Dell Laptops on EFI System Partition?

According to the UEFI specification (13.3.1.1 File System Format) an EFI firmware must support FAT12, FAT16 and FAT32 file systems for the EFI system partition (ESP). However, the Arch Wiki states ...
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Installing ubuntu dualboot - windows wont start

I was installing Ubuntu on one old notebook on the same HDD as windows. There was no EFI partition so I create one during the ubuntu installation process. There were some errors and in the end, I ...
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Remove EFI System Partition [duplicate]

I have a 2nd drive which has an EFI System Partition of 750MB and an unused partition of 118GB. I want to remove the EFI System Partition and reformat the entire drive. But when I click around there ...
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Partitions have become inaccessible

SETUP Dell Chromebook 13 7310 (with MrChromebox Firmware) EFI dual boot with Windows 10 and Ubuntu 19.10 WHAT HAPPENED BEFORE THE PROBLEM EMERGED When my laptop cannot wake up from hibernation ...
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Windows EFI Partition Not Editable

Based on the following question: How to access efi partition on windows 10? I have been unable to open the EFI partition by running the commands below: mountvol start \\?\Volume{xxxxxxx-ec0e-43ab-...
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220 views

Lack of EFI shell on machine

I don't appear to have an EFI shell on my machine, there's no option to access it through my BIOS and it never shew up in rEFInd when I used it. Is there any way I could install one?
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Windows 10 verbose boot by modding bootmgfw.efi?

Is it possible to verbose boot Windows 10 in UEFI mode via modifying the bootmgfw.efi file, or any other way? (I am using GRUB, not the default Windows bootloader, if that helps at all. I heard that ...
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nvme SSD not recognized after cloning a (hardware raid 10 sata) disk onto it using clonezilla

I had a RAID 10 VROC array of cheap SSDs that was degraded (1 out of 4 SATA SSDs dead). The array was degraded, but still worked. It had a GTP partition table and the regular 3 partitions that get ...
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secureboot with parrotOS - not able to sign custom kernel

I've installed Parrot OS on my surface and built the custom kernel for the surface from jakeday repo. I'm currently trying to sign my custom kernel that I can turn on secureboot again. I've followed ...
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Multiple Linux (Debian/Ubuntu 2018/2019, CentOS, Fedora) grub2 2.04 Installation and Booting Problems

First, I have some strategic questions: The Ubuntu installers automatically invoke grub-install in UEFI mode on UEFI hardware, even if I want to install grub2 on an external SSD. Can I avoid this, i....
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Can I check what caused the computer to power on in efi/uefi?

I need to force computers to boot from pxe if they power on due to wake-on-lan, and if started with power button they need to boot from hdd. Is there a way to check how the system was powered on in ...
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Reverting a Dual Boot Windows/Ubuntu

So I used to have a dual boot system with Windows for gaming stuff and Ubuntu for work, but I now have a separate machine for work so I dont use this Ubuntu anymore. Thats why I'd like to remove ...
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Restore EFI partition which was deleted while doing dual boot

I dual booted Manjaro with Windows 10 but the grub didn't show up. So, while installing again I formatted EFI 100 MB partition and installed Linux boot-loader there. Linux is running well but now I ...
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Good way to backup laptop SSD with UEFI, Ubuntu, Windows dual boot

I have an Acer Aspire R laptop with 260GB SSD, UEFI, Ubuntu and Windows 10 dual boot. How can I backup / clone / image the whole drive to be reinstalled on a new drive if current drive fails? a) ...
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52 views

Cannot boot Win10 from disk 2 while taking disk 1 with other Win10 out of computer. Dual WIN10 boot. Lack of EFI file?

I have two disk at computer and I installed two Windows 10 operating systems at separate drives. Unfortunately after taking out disk 2. I cannot boot windows 10 from disk 1. It looks like windows boot ...
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51 views

Would it be possible to change out the BIOS/EFI (open firmware) of a 2009 Mac mini for some other BIOS?

Would it be possible to change out the BIOS/EFI (open firmware) of a 2009 Mac mini for some other BIOS? I know this is not standard and nobody really does this, however I have a Mac mini, that I am ...
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68 views

Can't install CentOS 6.10 on UEFI-GPT Disk

So I have installed CentOS 6.10 minimal.iso for x64 bit system from their website and I have been trying all the morning to install it along Ubuntu which is already installed on a different partition, ...
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Does NTDETECT and NTOSKRNL available with UEFI GPT booting?

I am not able to understand the process after ESP will call Boot Manager where it ll begin loading Boot Loader and passes to the kernel. Last step which i mentioned am not able to understand whether ...

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