194 lines
6.4 KiB
Markdown
194 lines
6.4 KiB
Markdown
# Dual Boot Omarchy
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## Video Guide
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<p align="center">
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<a href="https://youtu.be/ZxHXKE8r1jI">
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<img src="https://img.youtube.com/vi/ZxHXKE8r1jI/0.jpg" width="700">
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</a>
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</p>
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Patch the [Omarchy](https://omarchy.com) ISO to install alongside Windows. Creates a modified ISO with a dual-boot installer that preserves your Windows installation while adding Omarchy with LUKS encryption and btrfs snapshots.
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## Requirements
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- **OS**: Arch Linux or Omarchy (to run the patcher)
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- **Omarchy ISO**: Download from [omarchy.com](https://omarchy.com)
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- **UEFI**: Required for dual-boot (no legacy BIOS support)
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- **Free disk space**: 20GB+ unallocated space on the target drive
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- **USB drive**: For booting the patched ISO (Ventoy recommended)
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## Quick Start
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```bash
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git clone https://github.com/28allday/Dual-Boot-Omarchy.git
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cd Dual-Boot-Omarchy
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# Place your Omarchy ISO in this directory, then:
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sudo ./patch-omarchy-dualboot.sh
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# Or specify the ISO path directly:
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sudo ./patch-omarchy-dualboot.sh /path/to/omarchy-3.x.x.iso
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```
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This creates `omarchy-dualboot-YYYY.MM.DD.iso` — copy it to a Ventoy USB and boot from it.
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## How It Works
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### The Patcher (run on your existing system)
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The patcher modifies the Omarchy ISO by:
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1. **Extracting** the ISO and its squashfs root filesystem
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2. **Injecting** a dual-boot setup script into the live environment
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3. **Replacing** the boot sequence to run the dual-boot installer on tty1
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4. **Repacking** the squashfs and creating a new bootable ISO
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### The Installer (runs when you boot the patched ISO)
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When you boot the patched ISO, you get a menu:
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| Option | Action |
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|--------|--------|
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| **1** | Install Omarchy alongside Windows (dual-boot) |
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| **2** | Clean up a failed installation |
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| **3** | Standard install (original Omarchy installer, wipes disk) |
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| **4** | Exit to shell |
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#### Option 1: Dual-Boot Install
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1. **Drive selection** — shows available drives, detects Windows partitions
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2. **Free space check** — verifies 20GB+ unallocated space exists
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3. **Encryption password** — sets up LUKS2 encryption for the Linux partition
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4. **Partitioning** — creates two partitions in free space:
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- 1GB EFI partition (labelled "LINUXEFI") for the Linux bootloader
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- Remaining space: LUKS2 encrypted partition for Linux root
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5. **Filesystem setup** — creates btrfs with subvolumes:
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- `@` — root filesystem
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- `@home` — user home directories
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- `@log` — system logs
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- `@pkg` — pacman package cache
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6. **Omarchy configurator** — collects your username and preferences
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7. **archinstall** — installs the base Arch system
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8. **Limine bootloader** — installed and configured with:
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- LUKS encryption support
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- Windows auto-detection
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- Bootable btrfs snapshots via snapper
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- Plymouth splash screen (Omarchy theme)
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9. **Omarchy packages** — installs the full Omarchy desktop
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10. **UEFI boot entry** — creates "Omarchy" entry in your firmware
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**Windows partitions are never touched.**
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#### Option 2: Cleanup Failed Installation
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If a previous dual-boot install failed partway through:
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- Detects and removes Linux partitions (LINUXEFI, LUKS)
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- Cleans up UEFI boot entries
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- Leaves Windows completely untouched
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## What Gets Created on the Target Drive
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```
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Drive (e.g. nvme0n1):
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├── Windows partitions (UNTOUCHED)
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│ ├── EFI System Partition (Windows Boot Manager)
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│ ├── Microsoft Reserved
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│ ├── Windows (C:)
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│ └── Recovery
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├── LINUXEFI (1GB, FAT32) ← NEW: Linux bootloader
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│ ├── EFI/BOOT/BOOTX64.EFI (Limine)
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│ ├── vmlinuz-linux (kernel)
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│ ├── initramfs-linux.img (initramfs with encrypt hook)
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│ └── limine.conf (boot menu with Windows + snapshots)
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└── Linux Root (LUKS2 encrypted) ← NEW: Omarchy system
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└── btrfs
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├── @ (/)
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├── @home (/home)
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├── @log (/var/log)
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└── @pkg (/var/cache/pacman/pkg)
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```
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## Booting After Installation
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1. Reboot your computer
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2. Press **F12/F8/DEL** at startup for the boot menu
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3. Select **"Omarchy"** for Linux or **"Windows Boot Manager"** for Windows
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The Limine boot menu also shows:
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- Omarchy (default)
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- Omarchy (fallback)
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- Snapshots (bootable btrfs snapshots)
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- Windows Boot Manager
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## Features
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- **LUKS2 encryption** — full disk encryption for the Linux partition
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- **Btrfs subvolumes** — proper layout for snapshots and rollbacks
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- **Snapper integration** — automatic timeline snapshots with bootable rollback via Limine
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- **Offline installation** — uses packages from the ISO, no internet required during install
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- **Plymouth splash** — Omarchy-themed boot animation
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- **SDDM auto-login** — boots straight into Hyprland
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## Dependencies
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The patcher automatically installs these if missing:
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| Package | Purpose |
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|---------|---------|
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| `xorriso` | ISO creation and manipulation |
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| `squashfs-tools` | Extracting and repacking the squashfs filesystem |
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| `cdrtools` | Reading ISO metadata (`isoinfo`) |
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## Troubleshooting
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### Can't boot into Omarchy after install
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- Use F12/F8 boot menu to select "Omarchy" manually
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- If no entry exists: boot the ISO again, choose option 4 (shell), and run:
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```bash
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efibootmgr --create --disk /dev/nvme0n1 --part N --loader '\\EFI\\BOOT\\BOOTX64.EFI' --label 'Omarchy'
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```
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### LUKS password prompt doesn't appear
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- Verify initramfs has the encrypt hook:
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```bash
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lsinitcpio /boot/initramfs-linux.img | grep encrypt
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```
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- Rebuild if missing:
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```bash
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sudo mkinitcpio -P
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```
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### Windows disappeared from boot menu
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- Boot into Omarchy, then:
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```bash
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sudo limine-update
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```
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This rescans for other bootloaders including Windows.
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### Failed install left orphan partitions
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Boot the patched ISO again and choose **option 2** (Clean up failed installation).
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## Uninstalling Omarchy (keeping Windows)
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Boot from the patched ISO, choose **option 2**, and it will:
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- Remove the Linux EFI and LUKS partitions
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- Clean up UEFI boot entries
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- Leave Windows untouched
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Then use Windows Disk Management to reclaim the free space.
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## Credits
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- [Omarchy](https://omarchy.com) - The Arch Linux distribution
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- [archinstall](https://github.com/archlinux/archinstall) - Arch Linux installer framework
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- [Limine](https://limine-bootloader.org/) - Bootloader
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- [Snapper](http://snapper.io/) - Btrfs snapshot management
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## License
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This project is provided as-is for the Omarchy community.
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