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Having issues getting Grub to recognise my windows drive.

I followed a guide which gave a step by step on how to have Windows and Ubuntu on two separate SSDs.

It pretty much went like this.

Install windows on ssd1

Disconnect windows drive and install ubuntu on ssd2

Boot into new ubuntu with windows drive connected and sudo update-grub

Done.

Except, here I am many hours later and I'm not done.

Sudo update-grub doesn't show a windows boot manager. Sudo os-prober doesn't show anything at all. I can see the drive with Windows on it in the Ubuntu file explorer. I can go into every folder except the windows one. (Not sure if this is a permissions issue or something? I don't use bitlocker so I don't think this is an encryption thing)

I've been messing around with this for ages now and I really have no idea what to do. I can smash F11 a million times when booting and choose Windows/Linux drives but I cannot get Grub to pick it up.

Any suggestions? (and if it wasn't already obvious I'm very new to this so -50 Int for suggestions haha) Thanks :)

ibuntwho
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2 Answers2

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Fixed by re-installing windows on GPT SSD in UEFI mode.

And my BIOS was automatically disabling windows boot manager when I installed linux on drive #2. So re-enabling that basically fixed the problem.

ibuntwho
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Well first thing first do trouble shooting on the windows drive. If grub isn't seeing the windows boot loader.... is it there.

Can you boot to just the windows drive? select the windows drive as the primary boot drive and see what happens. If that doesn't work remove the Ubuntu drive and do a boot with just the windows drive.

If your windows doesn't boot then you found the source of the error. If it does boot then your very strange idea of removing disks flopped. You should have left in both drives and installed Ubuntu and grub onto either the primary or secondary disk reflecting your preference for environment.

Eric Jurgens
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