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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.

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Can't locate Debian in efi folder (Windows 10/deepin dual boot)

I deleted a partition in Windows 10 to remove deepin distro. Now, when I attempt to launch Windows, I receive the 3F0 error. I made some progress in the command prompt to locate/remove the Debian file,...
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40 views

What file should I go for, bootx64.efi? Or bootmgr.efi?

I am going to do a clean install of windows 10 using usb stick. I followed the instruction successfully make a usb installation media. In the usb drive, you can see there is a bootmrg.efi file and ...
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44 views

Convert disk from UEFI boot to BIOS boot

I have a disk with a Windows 10 installation on a laptop that has suffered an unfortunate accident. I know the hard disk is still good, and now I'd like to move this disk, including the existing ...
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17 views

EFI Partition required or not required

Laptop OS got corrupt, could not boot. somehow recovered data. There are multiple partitions and 1 being Sony Boot partition. I want to delete all partitions and have 3 partitions, 1 for OS and other ...
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1answer
20 views

Windows 10 won't boot after moving EFI partition

On dualboot, I had two EFI partitions on two drives. One drive with EFI partition for GNU/Linux, second drive and EFI partition for Windows. I moved Windows boot files from second EFI partition to ...
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1answer
19 views

Change boot order on a Mid 2010 Mac Pro, without MacOS

I have a mid 2010 Mac Pro. I don't have MacOS installed on it. Instead I have two separate Debian installs (I've recently upgraded the hard drive to an SSD, but still want to keep the previous hard ...
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1answer
27 views

Moving Windows partition (EFI, GPT)

Suppose I have a computer that was once a purely Windows desktop, whose disk contained at least the usual EFI System Partition (the ESP) and the Windows partition itself. Suppose that one day I ...
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72 views

Using built-in eMMC SD card slot on UEFI

I have a Lenovo ThinkPad X1 Yoga 1st (20FR). It has an eMMC SD card slot which doesn't seem to be available from the firmware, even though some relevant drivers are loaded: (uefi shell) > drivers ...
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2answers
70 views

EFI partitions after wiping out Ubuntu

I've decided to wipe out dual booted-Ubuntu off my pc. However, i made a mistake of not dealing with the partitions before wiping Ubuntu off. Now, windows is not letting me extend my HDD with the ...
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1answer
38 views

Fixing my multi-OS U/EFI Situation

You'll have to forgive my ignorance - even after some reading the suject elludes me a bit. I have the following installed and was booting them all successfully using rEFInd: Windows 10 Antergos (...
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1answer
82 views

PureOS on MacBook without Windows

I've been trying to find a good way to install PureOS on a Macbook Pro. So far I've only seen one very convoluted solution that involves installing a trial version of Windows 10. I'm looking for a ...
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1answer
135 views

Using Physical EFI Disk Image as a Virtual Hard Drive [duplicate]

I imaged an HP Envy laptop that has an M.2 Solid State drive. When I view the image file in FTK I can see 5 partitions including the Windows partition. I would like a virtual instance of this ...
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123 views

Installing rEFInd on Windows 7

ALL, I'm trying to follow an instruction here to install rEFInd on top of my Windows 7 laptop. Problem is - step 2 fail because apparently mountvol on Windows 7 does not have an option "/S". I tried ...
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44 views

Is it possible to boot from a Dos 6.22 USB drive… on a mac pro?

Using UNetBootin, I've made a bootable DOS 6.22 usb drive from a dos 6.22 bootdisk ISO. The drive is a 4gb FAT32 drive, formatted on a windows machine. Is there anyway to boot a 2013 Mac Pro ...
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0answers
35 views

How to boot Arch Linux on MSI B250M PRO-VDH?

I want to achieve a proper GRUB installation, so it will be able to EFI boot Arch Linux on my MSI B250M PRO-VDH without further user intervention. Everything has been set-up as it follows: /dev/sdc1 ...
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56 views

Move EFI partition when there is no space left - may I remove OEM Partition?

Over the years, after several moves to Linux and back, my home PC ended with the following awkward partitions on its two SSDs (all data is on NAS) Disk1: [--- EFI partition 32MB ---][--- Empty ---] ...
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259 views

OPNSense VGA MBR USB

I want to install OPNSense on my HP DL360 G6 but it only boots USB drives that use MBR partition scheme, not EFI. The VGA img file is EFI, so it doesn't recognize it and doesn't boot. And when I try ...
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1answer
231 views

Create MBR Bootable Ubuntu USB from Mac

I need to create an ubuntu 16.04 server install USB from a Mac but the computer I'm installing it to only supports booting from MBR USBs. It seems when I try dd it makes it an EFI formatted drive. ...
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4answers
993 views

Run EFI files/scripts from [boot, virtual media] ISO

Most vendors recently provide servers firmware updates only as set of EFI files (example). But their servers internal (also as any external) IP-KVM can connect only ISO images as boot virtual media. ...
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1answer
350 views

Moving `/boot` and `/` (root) partitions about on GPT/UEFI volume

I work under Linux with a 500GB GPT internal storage device, partitioned, so /boot, / (root), /var and /home are in separate ext4 volumes. For historical reasons (it used to be a dual Linux-Linux ...
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1answer
221 views

I'm confused! I don't have an EFI partition in my drive, but I can boot Windows 10 anyways

I installed Windows on my new SSD in my laptop and I noticed that there is an OEM, a Recovery and the C: partition but no EFI. I heard that the latter is necessary for Windows to boot, so how come my ...
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1answer
556 views

How to safely set, change, remove values of EFI variables

After spending hours debugging a problem where systemd-boot started skipping its boot menu and in general ignoring its configuration file /loader/loader.conf (on the EFI partition), I've discovered ...
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2answers
3k views

Could not locate '\EFI\Boot\bootia32.efi': [14] Not Found

When I boot up Windows 10 IoT (64-bit) on one specific device, before booting, a black screen with the following message always pops up: ** UEFI:NTFS (ia32) ** [INFO] Boot disk: PciRoot(0)/Pci(...
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155 views

Can Clonezilla and GParted be put on an EFI partition?

So here's the dilemma: I have a bunch of flash drives I'm trying to set up as multi-boot utility drives for Clonezilla and GParted, and since those utilities don't take up very much space, I'd also ...
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1answer
57 views

Recover data from EFI partition

I'm using Windows 10. While installing Ubuntu I accidentally converted one of my data partitions (drive D) to an EFI system partition. After restarting the system in Windows, I cannot access drive D. ...
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320 views

Booting from USB - MiiX 300

So I've tried to install Android_86 and went wrong somewhere couple years so and I formatted my internal HD in my Lenovo MIIX 300 and it only has grub now. I want to fresh install windows again and I ...
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1answer
240 views

Windows refusing to install due to ESP formatted as NTFS

After converting my MBR disk to GPT when the only partition left is an NTFS partition, I can't install Windows because the partition is marked as EFI System Partition. The guides I found recommend to ...
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1answer
863 views

rEFInd doesn't start Mac OSX

I had rEFInd running fine previously. Then I updated to Mac OSX Mojave beta. After the update, rEFInd was missing. So I just reinstalled it. However, it didn't work. Went back to 10.13.5 fresh ...
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0answers
38 views

rEFInd's EFI file removed but computer still boots on

I'm on multiboot (Ubuntu/LUKS, Win7/VeraCrypt, Win7 unencrypted) and I installed rEFind to tinker few boot things I slightly broke. I nearly made my stuff and now I want to remove it (or at least make ...
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1answer
133 views

Where does the BIOS get the boot options from and how do I remove them?

My question in short: My BIOS gives me boot options to old Linux distros that dosen't exist anymore. How can I remove them? The longer version: I'm running a UEFI multiboot PC with the following ...
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282 views

Restoring EFI folder/boot without reinstall

After a recent disaster while attempting to dual boot Ubuntu and Windows 10 (Grub did not completely install and my BIOS constantly tried to boot from the D: drive rather than the C: drive), I used ...
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1answer
46 views

Script before OS starting

I need to run a script before the operating system starts. The script reads a text file (on file-system FAT32), if the result is "A", then launch OS1, elseif the result is "B", then launches OS2 (...
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57 views

What is this 32GB partition named “HFS” which windows 7 installed?

I have an existing UEFI/GPT linux install and wanted to dual boot windows 7, which doesn't normally like UEFI/GPT. I had to install Windows 7 SP1 with the bios set to UEFI+CSM (mixed mode, allowing ...
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1answer
73 views

EFI partition appearing after factory mode

When I reset my Windows 10 to factory mode, a new partition showed up; it's an EFI partition. It's my new laptop and I am concerned about whether that could cause any problem. delete files in the ...
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303 views

Stuck in Efi Shell

Okay so I’ve gotten myself into a bit of a predicament. I recently was attempting to download windows onto my Chromebook, and i found a guide that told me to try the Mr. Chromebook download, which i ...
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1answer
184 views

Original Windows 7 installation disk on EFI computer

I have an original Windows 7 64-bit installation disc, but with my new computer (Cloud Project AIR-X1 based upon Intel Atom Z3735) I can't boot from it. It's because the CD is not EFI-compatible. My ...
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1answer
6k views

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 ...
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207 views

recovery and efi system partitions on secondary hard

i have two drives the ssd which have windows 10 on it and another 1tb hdd one that gonna contain only data but because i installed windows on it previously it has two partition recovery and efi system ...
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0answers
2k views

Mount EFI partition on a removable media in Windows 10

There are these similar questions like mine already: How do I mount the EFI partition on Windows 8.1 so that it is readable and writeable? But, my trouble is that these methods are not working for ...
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59 views

Grub doesn't seem to find grub.cfg automatically?

Whenever I start my Linux machine I get greeted by the Minimal Bash like editing... screen and I always have to specify the grub.cfg file manually. I tried the command update-grub2 but the next time I ...
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1answer
4k views

Stuck at EFI Shell version 2.31 [5.8]

A friend gave me a pc the other day saying that it can't boot. All i got is that the machine is a vulcan laptop model no VNB11602IS. I tried running some live distros using a USB drive but no luck. ...
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302 views

Add EFI capability to GRUB2 on hybrid dual boot MBR type eHDD

I am trying to create a universal (BIOS/EFI) bootable USB HDD that can provide me with portable 32-bit & 64-bit ‘Windows To Go’ environments, together with a 64-bit Ubuntu-based distro and 64-bit ...
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0answers
2k views

Windows doesn't directly boot, always launches EFI shell

I have to type exit in the shell everytime to launch my Windows 10 OS. I do have the proper boot order in my firmware settings(i.e. HDD first). I tried lot of settings like Fastboot, Legacy boot,UEFI ...
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2answers
221 views

Partitions at the beginning and end of drive and migration to smaller SSD

I need to migrate one 256GB HDD to 240GB SSD, but EFI partition is at the very end of my HDD. I already did backup: sudo dd if=/dev/sda of=backup.img but I can't put this image to my SSD drive, ...
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1answer
31 views

thumbrules for figuring out space so that windows boot loader and linux can live happily.

I have tried it two times already and each time I hit some or the other road-block. AFAIU it, both Windows 10 and any GNU/Linux say Debian can live each happily with each other. Now I have a 4 TB ...
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1answer
349 views

How can I delete current OS EFI boot record when going for a fresh new Windows 10 installation

Long story short, I went for UEFI installation using Rufus without know what UEFI was about a month ago, did some things wrong and ultimately I have EFI records of OSes that no longer exist on my SSD (...
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1answer
5k views

Startup issues possibly startup.nsh in EFI shell

I have a mini PC that always boots into Windows no matter what boot order is set in UEFI. I thought there was a startup script on ESP/EFI partition that was overwriting the boot order at every startup ...
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0answers
494 views

Linux Mint with EFI, Windows 10 with MBR

Long story short, I now have two drives in my PC: /dev/nvme0n1 - Linux mint installation, EFI boot. Primary OS /dev/sda - Windows 10 installation, MBR boot. Secondary The idea is, as you probably ...
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987 views

Dual boot Windows 10-Ubuntu - Grub, os-prober not detecting Windows 10 partition

Got my Dell XPS 9560 replaced by warranty after motherboard on previous one went bad. Took out the HDD on the new unit and swapped it out with SSD in previous unit. In the past when swapping out hard ...
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1answer
304 views

Is it meaningful to have an EFI/UEFI boot disk?

I would like to create a minimal boot disk and have the option of DOS, Linux or EFI executables. As I understand, UEFI is a substitute for classic system BIOSes and has its own byte code definitions, ...