Issue With dual boot.

[itsvrushabh]

System details

Omarachy 3.3.3

What's wrong?

Hey Team,

###I aleardy used the linux with dual boot. I have two different SSD to install two OS.

###When I install omarchy. Omarchy remove my other bootable drive from firmware.

Regards
Vrushabh

[badnikhil]

Nothing was actually removed from your SSD.

What Omarchy likely did was overwrite or reprioritize UEFI boot entries, not erase the other OS. This is common when installers run grub-install or efibootmgr without preserving existing entries.

A few important points to check:

Firmware (UEFI) boot order

Enter UEFI/BIOS setup and check if the other SSD is still listed

Many installers set themselves as the first (or only) boot entry

EFI System Partition (ESP)

If both OSes share the same ESP, Omarchy may have overwritten the bootloader files

The other OS’s root filesystem is usually still intact

Boot entries can be restored

From Omarchy or a live Linux ISO, you can inspect with:

lsblk
efibootmgr -v

Missing entries can be recreated manually with efibootmgr

Dual-disk setups still share firmware

Even with two separate SSDs, UEFI boot entries live in firmware NVRAM

Installers modifying NVRAM affects all disks

This is usually recoverable without reinstalling either OS.

If you can share:

UEFI or Legacy boot mode

Whether both OSes use the same ESP

Output of lsblk and efibootmgr -v

it should be straightforward to restore the missing boot entry.