help please error on bios grub

[xmanz]

Hi there im trying to get my ssd with w10 to be reconised again after a mint fresh install it doesnt seem to want to be shown.
amongst issues id though id start with this one incase it affects other issues....so this is my mint install ssd.......

this is windows 10

win 10

grub data

any help appreciated

[Jo-con-Ël]

It looks like Windows is installed on BIOS legacy mode. Current Mint editions (LM 21.X) try to install on both BIOS and UEFI mode. In your case EFI partition (sda1) is not flagged correctly (it would esp,boot) to boot on UEFI mode and also that bios boot/bios_grub (sda2) partition you have created is ext.4 and it used to be no filesystem at all (cleared). I´m not sure those changes on flags and filesystem was made for you after installing and you didn´t commnent what you did before.

Run and post back sudo efibootmgr -v and/or inxi -SM to confirm the mode you are booting . ´

If booting on BIOS legacy mode, Windows will be detected after running sudo update-grub and Windows entry will be offered on next boot GRUB menu (no need to modify grub file).

You would be able to boot Mint on BIOS mode, choosing Mint´s disk on computer´s boot menu (see this or you computer user manual), not ubuntu or EUFI Mint disk option.

If it is not, no Mint BIOS boot option is offered on computer boot order/boot menu or you can not boot that option, then BIOS Legacy mode install would failed. In that case:

Maybe you want to reinstall Mint from scratch and avoid UEFI mode Install, ensuring it installs on BIOS legacy only mode: booting Linux Mint Live on BIOS mode, formatting Mint disk on MBR/msdos partition scheme and creating only one ext.4 partition with Gparted or Disks, installing Mint with Something Else option and ignoring the warning to create an EFI partition).

Without reinstalling (so keeping Mint already installed) I would try booting Linux Mint live USB on BIOS mode to format bios boot partition to cleared and re-flag if needed with Gparted. Then reinstalling grub (bios).

Wait for another users suggestions as I´m not sure you can recreate bios-grub partition (maybe with gdisk or running dd on terminal) from Mint installed session. Also I´m not sure running sudo grub-install --target=i386-pc /dev/sda will work w/o formatting sda2 to cleared.