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Grub fails to recognize Windows on a different disk.

Grub fails to recognize Windows on a different disk.

G
Gerardo_DG_YT
Junior Member
23
08-11-2025, 07:38 AM
#1
Grub bootloader isn't recognizing my Windows setup. It seems Windows is on a separate drive than the GRUB installation. Am I correct in assuming GRUB doesn<|pad|> to ignore installs on different disks? Windows is mounted at /run/media/isxander/Windows. I've tried update-grub and os-prober, but nothing fixed the issue. Edit: I've faced GRUB problems before. Manjaro hides GRUB by default. Also, in grub.cfg many lines are commented out when the 'uncomment if' option is used, indicating Manjaro has made significant changes. Edit 2: I'm new to Linux and feel uneasy altering configurations unless I follow a detailed guide (please understand).
G
Gerardo_DG_YT
08-11-2025, 07:38 AM #1

Grub bootloader isn't recognizing my Windows setup. It seems Windows is on a separate drive than the GRUB installation. Am I correct in assuming GRUB doesn<|pad|> to ignore installs on different disks? Windows is mounted at /run/media/isxander/Windows. I've tried update-grub and os-prober, but nothing fixed the issue. Edit: I've faced GRUB problems before. Manjaro hides GRUB by default. Also, in grub.cfg many lines are commented out when the 'uncomment if' option is used, indicating Manjaro has made significant changes. Edit 2: I'm new to Linux and feel uneasy altering configurations unless I follow a detailed guide (please understand).

J
JopperMan
Member
121
08-12-2025, 04:35 PM
#2
Use rEFind to check for your Windows EFI file.
J
JopperMan
08-12-2025, 04:35 PM #2

Use rEFind to check for your Windows EFI file.

T
TynthBR
Junior Member
1
08-16-2025, 10:36 PM
#3
Grub.cfg might need manual adjustments. Refer to the discussion in another forum for more details. This problem has been reported before as well.
T
TynthBR
08-16-2025, 10:36 PM #3

Grub.cfg might need manual adjustments. Refer to the discussion in another forum for more details. This problem has been reported before as well.

A
AthuskTheBooli
Junior Member
18
08-18-2025, 12:31 AM
#4
In this situation, os-prober doesn't display any output. The previous discussion identified this issue.
A
AthuskTheBooli
08-18-2025, 12:31 AM #4

In this situation, os-prober doesn't display any output. The previous discussion identified this issue.

V
Vichoflo
Senior Member
396
08-18-2025, 04:45 AM
#5
Absolutely, many face this issue.
V
Vichoflo
08-18-2025, 04:45 AM #5

Absolutely, many face this issue.

R
Raidex20
Posting Freak
751
08-18-2025, 12:46 PM
#6
For a UEFI install, you must employ grub-uefi while avoiding grub2 and the reverse.
R
Raidex20
08-18-2025, 12:46 PM #6

For a UEFI install, you must employ grub-uefi while avoiding grub2 and the reverse.

Z
Zmondy
Senior Member
405
08-18-2025, 04:16 PM
#7
What operating system am I running? Is my Windows UEFI or something else? How do I reinstall GRUB?
Z
Zmondy
08-18-2025, 04:16 PM #7

What operating system am I running? Is my Windows UEFI or something else? How do I reinstall GRUB?

M
54
08-18-2025, 05:29 PM
#8
I would just reassess and reinstall both.
M
Miltondahlberg
08-18-2025, 05:29 PM #8

I would just reassess and reinstall both.