You might review it and see if the method you used was similar as some methods delete the partitions.
I don't know if the tool you used to convert to MBR is similar to the software described below which indicates that it can do so without data loss.
I don't know why you were unable to install windows 10 on a GPT drive as that is the default for windows 10, UEFI on a GPT drive. Linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile toram noejectĭrwxr-xr-x 2 fred fred 4096 Jan 8 15:47. Set isofile="/ISO/focal-desktop-amd64.iso" Then created grub.cfg to boot cat grub.cfg Sudo grub-install -target=x86_64-efi -boot-directory=/media/fred/FOCAL/EFI/BOOT -efi-directory=/media/fred/FOCAL llĭrwxr-x-+ 3 root root 4096 Jan 20 13:52. I installed grub to flash drive & created ESP & folder for ISO. I could not use newer grub 2.04, but 2.02 works. Number Start End Size File system Name Flagsġ 1049kB 4051MB 4050MB fat32 focal msftdata Sector size (logical/physical): 512B/512B I really recommend USB3, but all my USB3 flash drives are large & I only wanted focal on this one. I just installed 20.04 to a new NVMe drive from my sdb drive, which became sda as I unplugged a M.2 SATA drive. win file that is over 4GB and will not work on FAT32. Most Linux ISO are not that large, but newer Windows now has a.
I often then include an ISO or two in data partition, but full install is often all I need for repairs.įAT32 will not support any file over 4GB. And my larger flash drives are now full Ubuntu installs with data partition. Most of the time now, I have ISO on SSD & HDD and loopmount those to install on the other drive. So I now use a standard configfile entry in grub that does not change and a text file with all the grub2 loopmount boot stanza in my ISO folder. I always forget to run 'sudo update-grub' when updating or changing an ISO. I did once use grub to boot a Windows 7 repair flash drive, but that was not an ISO. I am almost positive that grub will not boot Windows ISO. I had to do that with Puppy years ago, but only have used Ubuntu, gparted and a couple others in recent history.
So then you have to at least extract kernel & initrd files to boot. UEFI grub install and example grub boot stanzas, Also WindowsĪ few ISO are not configured to boot using grub2's loopmount. ISO Booting with Grub 2 from Hard drive - drs305Įxamples - you may copy & edit for your path & ISO version
How to Create a EFI/UEFI GRUB2 Multiboot USB drive to boot ISO images And different versions use slightly different names like linux or linux.efi etc. I often have to open ISO to see what grub uses as boot parameters. I find getting path and boot parameters correct as most common issue. Is there some issue with letting Windows have its own flash drive and everything else on another larger flash drive.īasically you just install grub2, create a folder for the isos and edit a grub.cfg to loop mount the isos. But I do not think Windows supports that. I use grub2's loopmount to boot many ISO on one flash drive. We all a volunteers and need to know what has already been suggested. So moved to Other Linux support since not an official Ubuntu flavor.īest to ask one question per post, so all posts can be about that question, otherwise it can get confusing.īut do not double post same question.