Windows missing in Grub2 Efi menu

[Tarp]

Hi
Unfortunately I have to have keep a dualboot option with Leap 15.2 and Windows 10 on my desktop computer in order to use a certain slide-scanner software, that will not run in linux (despite efforts..).
I have two SSDs in the computer; sda for Opensuse and sdb for Windows and It has worked until recently. Why the Windows option went missing I can not tell. It was not something that I did actively.

I have read several posts to try to fix the issue myself and I have made these two commands to get info:

localhost:/home/soren # efibootmgr -v
BootCurrent: 0002
Timeout: 3 seconds
BootOrder: 0002,0003,0000
Boot0000* opensuse-secureboot   HD(2,GPT,cccf3b96-6829-4e45-bfd4-cbd7c095171c,0x4800,0xfa000)/File(\EFI\OPENSUSE\SHIM.EFI)
Boot0002* opensuse      HD(2,GPT,cccf3b96-6829-4e45-bfd4-cbd7c095171c,0x6294000,0xfa000)/File(\EFI\OPENSUSE\GRUBX64.EFI)..BO
Boot0003* opensuse      HD(2,GPT,cccf3b96-6829-4e45-bfd4-cbd7c095171c,0x4800,0xfa000)/File(\EFI\OPENSUSE\GRUBX64.EFI)..BO

localhost:/home/soren # blkid
/dev/sda1: UUID="b77f8b28-87f7-44c2-a64b-61034cf97f55" TYPE="ext2" PARTUUID="69fa5493-7e7b-49cd-8b2c-1cab665e5140"
/dev/sda2: SEC_TYPE="msdos" UUID="868A-6BDF" TYPE="vfat" PARTUUID="cccf3b96-6829-4e45-bfd4-cbd7c095171c"
/dev/sda3: UUID="55566329-3db6-4fa4-8ea5-19015aada123" UUID_SUB="fa7466aa-eaa4-4771-93ff-2e091b2eea7e" TYPE="btrfs" PARTUUID="4d7cd186-2aa5-4e69-a76d-11efefd9f1ff"
/dev/sda4: UUID="a13607c4-be9a-4356-8800-f6547cca46e4" TYPE="swap" PARTUUID="e262ba3b-27bd-42e9-8b0f-5cc619314c90"
/dev/sda5: UUID="88f66972-9888-4b7a-a5a2-405d79ccb02c" UUID_SUB="0b7d4673-eb12-4ef9-9c7c-28237b7bca26" TYPE="btrfs" PARTUUID="64468fa7-13bc-424f-b0b2-100c4bb24bc8"
/dev/sdb1: LABEL="Genoprettelse" UUID="1872FB1672FAF6FA" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="dc8b28d2-e254-43ad-b1ef-d450dd176d7e"
/dev/sdb2: UUID="2004-0144" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="509772ac-8c8c-40d2-98be-38f1f541160d"
/dev/sdb3: PARTLABEL="Microsoft reserved partition" PARTUUID="47b0e236-35ae-4fe9-9687-ca91836bf938"
/dev/sdb4: UUID="08320F2B320F1CF6" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="505fb991-08b3-48aa-80a0-5ecbc43b400b"
/dev/sdb5: UUID="10D42506D424EFA0" TYPE="ntfs" PARTLABEL="sdb1" PARTUUID="f78f7078-66ad-463f-bf8e-426e3f4da199"

How do I get Windows back as an option in Grub"

LABEL="Genoprettelse" means LABEL=Restore (in Danish)

Thank You ind advance!

[malcolmlewis]

Hi
Likely unchecked the YaST2 bootloader entry to 'probe foreign os'? If you run the following command as root user;

os-prober

Do you see the Windows entry appear?

[Tarp]

os-prober

creates an empty return..

[malcolmlewis]

os-prober

creates an empty return..

Hi
So if you look down in /boot/efi/EFI directory on /dev/sdb2 is there a MS directory?

[Tarp]

I cannot get access to dev/sdb2 - access denied - even as root.

[malcolmlewis]

I cannot get access to dev/sdb2 - access denied - even as root.

Hi
It should be mounted?

ls -la /boot/efi/EFI

[Tarp]

localhost:/home/soren # ls -la /boot/efi/EFI
totalt 40
drwxr-xr-x 4 root root  8192 25 okt  2019 .
drwxr-xr-x 3 root root 16384  1 jan  1970 ..
drwxr-xr-x 2 root root  8192 28 aug 00:29 boot
drwxr-xr-x 3 root root  8192  7 dec  2019 opensuse

[malcolmlewis]

localhost:/home/soren # ls -la /boot/efi/EFI
totalt 40
drwxr-xr-x 4 root root  8192 25 okt  2019 .
drwxr-xr-x 3 root root 16384  1 jan  1970 ..
drwxr-xr-x 2 root root  8192 28 aug 00:29 boot
drwxr-xr-x 3 root root  8192  7 dec  2019 opensuse

Hi
Looks like you will need to boot from the Windows media and fix booting. Now have you tried booting from the BIOS boot menu? Your sure that the windows install was UEFI boot and not legacy?

[Tarp]

Thank You I will try that option - and no - I am not sure that Windows were installed in UEFI mode - I was probably not even aware of the possible issues at installation time.

[arvidjaar]

Hi
It should be mounted?

ls -la /boot/efi/EFI

What makes you believe /boot/efi is /dev/sdb2 and not /dev/sda2?