i use UEFI
Now i just want to make sure what i am doing is safe, here are the steps i am going to take:
I will use a usb to open Windows installer
resize the current 3.60 tb drive to 3.1 tb
create a new partition for windows
install windows on it
Now i have windows working, but grub has been replaced!
i use my other live usb to boot up into Manjaro Live USB
follow the guide to reinstall grub
is this correct?
everytime i update windows will i need to re do the grub install?
whats the chances it will corrupt / delete my files?
is it possible to make it so Windows cannot access my Manjaro drive (just wanting to make sure that if one day something happens on windows it wont access manjaro.)? (not a problem if not possible)
Will this corrupt my bios or cause problems in anyway? (Even if i do it correctly)
Now i also have another question, if i use a totally new SSD, that i will buy and install on my pc will it still delete grub or does that not have to do anything with it?
You have to shirink the ext4 partition from a manjaro live usb session. Otherwise correct. There is no way to absolutely protect the ESP from windows (the 100MB green partition), it is not messed up on every update but 1-2 times a year.
Windows will not see the ext4 and never touch anything there.
Can you explain what you mean by “Windows will not see the ext4 and never touch anything there.”. What is located in ext4? My friend helped me Install manjaro a year ago and i lost contact with him so i do not know what is on there.
I’m not sure you can install Windoof on a partition beyond 2 TB of the start…
It would be better to save the big amount of user data from your ext4 partition and to shrink the Linux partition to let’s say 100 GB or what ever needed for the application part. Then Windoof could be installed at a partition within the first 2 TB.
The Windows installer should normally allow you to create an ESP on that drive. But I’m not sure, as I don’t use Windows. I only know about Windows from what I read about it, and that’s not very flattering.
Yes, but after editing /etc/default/grub in order to enable the os_prober — which you only need to run once, so after it has found Windows and added it to the GRUB menu, you must edit the file again in order to disable the os_prober again.
Using a second ESP partition or drive will reduce the risk of windows overwriting something at least on minor/quarterly updates. You should be aware that there is no absolute guarantee. I have done exactly that, and than i updated the bios from the windows tool and kaboom… i had to restore grub. So keep the manjaro flash usb close. The problem is, the UEFI boot process has two components - the loader on the ESP partition (the little green thing), and the UEFI variables. And every OS have access to these (and can write or delete them), even if the disk component is excluded.
While at /etc/default/grub also check some of the other settings, because the grub menu is hidden by default. It is easier to have a menu instead of hitting ESC every time you need to switch the OS
Let me correct the above list:
Between 1 and 2 you will have to follow the guide to restore grub
Forget 4: if you are dual booting you need os prober enabled. On every kernel update (at least once a month) in manjaro the grub menu list is regenerated and you obviously need windows to appear there.