Hello everyone,
I had two drive, one for Windows 10 and the other one for Manjaro.
Both os installed on UEFI mode, GPT drive.
I chose “Erase Disk” when installing Manjaro.
I set Manjaro as first boot priority.
Here comes the problem, GRUB is not showing Windows when boot. I also check several similar question, but almost all of them encounter the problem because their Windows is installed on BIOS mode, MBR drive and Manjaro on UEFI mode, GPT drive. Any workaround?
Thanks.
In manjaro “sudo update-grub”
also by default grub is hidden if only one O/S.
Hei, thanks for the reply.
Already ran ‘sudo update-grub’ twice, but still not works.
And yes, after installation GRUB is not showing, but i set the config file from ‘hidden’ to ‘menu’.
Please post the output of these commands:
sudo os-prober
sudo parted -l
efibootmgr -v
sudo os-prober
Not showing anything.
sudo parted -l
Model: ATA Patriot Burst (scsi)
Disk /dev/sda: 120GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 2097kB 317MB 315MB fat32 boot, esp
2 317MB 111GB 110GB ext4
3 111GB 120GB 9449MB linux-swap(v1) swap
efibootmgr -v
BootCurrent: 0001
Timeout: 0 seconds
BootOrder: 0001,0002,0003,2001,2002,2003
Boot0001* EFI Hard Drive (Patriot Burst) PciRoot(0x0)/Pci(0x17,0x0)/Sata(2,32768,0)/HD(1,GPT,7ce6036e-0f3d-bf46-a7a2-077dc27050fa,0x1000,0x96000)RC
Boot0002* Manjaro HD(1,GPT,7ce6036e-0f3d-bf46-a7a2-077dc27050fa,0x1000,0x96000)/File(\EFI\Manjaro\grubx64.efi)
Boot0003* Windows Boot Manager HD(1,GPT,c8dff997-bf1b-4400-b957-ea6d9397f86e,0x800,0x82000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...)................
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC
Model: ATA Patriot Burst (scsi)
Disk /dev/sda: 120GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 2097kB 317MB 315MB fat32 boot, esp
2 317MB 111GB 110GB ext4
3 111GB 120GB 9449MB linux-swap(v1) swap
Your other disk (with Windows) doesn’t show up at all. Disk failure? I couldn’t say but something is not right.
Well done! You have deleted Windows! Only thing that remains is the boot entry:
Delete it:
sudo efibootmgr -B 0003
PS:
Boot0003* Windows Boot Manager HD(1,GPT...
Boot0002* Manjaro HD(1,GPT,...
It is the same harddrive. So if you have only this one, then windows is gone.
You have only shown /dev/sda what about /dev/sdb your second drive?
nope, the windows is not gone. I can set the boot priority to Windows Boot Manager to boot into Windows.
Well, then… where is the HDD/SSD? 
yes the two other comment also ask where is the other drive.
i also don’t know the answer 
when im on Manjaro, the Windows drive is not showing, and vice versa.
Does it mean that you can still boot up your Windows? Through Bios boot menu?
yes i can
Check this list 
That’s something!
This is a rather odd case. I am afraid I can’t wrap my head around it.
If your system used two distinct devices - it is possible to decide which one to boot using the device boot menu ( commonly F12 or F7 ).
I think you should service yourself by boot a live USB then run filesystem check on your root partition.
fsck /dev/sda2
Then boot Windows in fail safe mode and run chkdsk c: /f
Something is off or wrong on your system - is impossible to know …
Thanks! It worked.
The problem is on my Windows drive, it used RST format, had to change it to AHCI first. I did a clean install after that (i don’t if GRUB showed Windows after the drive changed to AHCI without re-install).
After the installation complete, you CAN’T change the Windows drive to RST format again, otherwise GRUB will not show Windows drive.
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