I am using dual boot Ubuntu 16.04 and Windows 10. There is a problem which I cannot boot to my normal Windows, and am trying to recover it via USB stick. However, even if I change the boot order, the grub menu still displaying and I have no option to boot from USB.
1 Answer
Yes there is a way.
First make sure you have secure boot disabled from the firmware settings. (The menu that opens when you press f2 during boot)
Then follow the following steps:
- Press c when in grub menu to open command line
- press
ls
to list all partitions in all hard drives
my output was as follows:
grub>ls
(hd0) (hd0,gpt1) (hd1) (hd1,gpt8) (hd1,gpt7) (hd1,gpt6) (hd1,gpt5) (hd1,gpt4) (hd1,gpt3) (hd1,gpt2) (hd1,gpt1)
This clearly shows that my usb drive is hd0.
- type
ls (hd0,gpt1)
to confirm:
Output is as follows:
grub>ls (hd0,gpt1)
Partition hd0,gpt1: Filesystem type fat - Label `CES_X64FREV`, UUID 4099-DBD9 Partition start-512 Sectors...
Inplace of
(hd0,gpt1)
type the address of first partition of usb disk e.g:(hd1,gpt1)
or(hd2,gpt1)
. According to output ofls
command.
We need the UUID shown in the above line
- Note the UUID of you usb drive.
Type the following commands one by one.
insmod part_gpt insmod fat insmod search_fs_uuid insmod chain search --fs-uuid --set=root 409-DBD9
In place of 4099-DBD9, write UUID which you noted down earlier.
Now we select the efi file to boot from. Type the following:
chainloader /efi/boot/bootx64.efi
Finally type
boot
That's it, That should boot the usb drive.
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1Worked for booting a Mint 19 tara USB stick after many other approaches failed! Amazing!– jcandyJan 19, 2019 at 23:21
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1It works! but I had to doing some dancing to get there. Not sure how the ls command "clearly" shows which is which. I ended up doing "ls (hd0)" which gave a size that matched my usb disk size to confirm. Then I used the "ls" command again with a tab complete to find that (hd0,msdos2) contained the /efi/boot/bootx64.efi path: "ls (hd0,msdos2)/efi/boot/bootx64.efi" I could then get the UUID and follow the rest of the steps.– NoremacOct 23, 2020 at 16:34
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1Thanks man, finally this worked after trying many things in the whole day. Dec 13, 2020 at 16:37