56c07dbe49
- Removed 40+ broken/messy scripts, moved to old_scripts/ - Created lvm_block_backup.sh - proper block-level LVM snapshot backup - Uses dd for block-level cloning instead of file-level rsync - Successfully tested: 462GB backup in 33 minutes - Creates exact, bootable clone of internal drive to external drive - Proper LVM snapshot management with cleanup - Clear documentation in README_BACKUP.md - Clean, minimal solution that actually works
274 lines
8.2 KiB
Bash
Executable File
274 lines
8.2 KiB
Bash
Executable File
#!/bin/bash
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# GRUB Boot Repair Script for LVM Migration
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# Fixes GRUB bootloader issues after LVM migration to external M.2 drive
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set -e
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# Colors for output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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# Configuration
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VG_NAME="system-vg"
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EXTERNAL_DRIVE="/dev/sda" # Adjust if needed
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log() {
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local message="[$(date '+%Y-%m-%d %H:%M:%S')] $1"
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echo -e "${BLUE}$message${NC}"
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}
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error() {
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local message="[ERROR] $1"
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echo -e "${RED}$message${NC}" >&2
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exit 1
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}
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warning() {
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local message="[WARNING] $1"
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echo -e "${YELLOW}$message${NC}"
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}
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success() {
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local message="[SUCCESS] $1"
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echo -e "${GREEN}$message${NC}"
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}
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confirm_action() {
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echo -e "${YELLOW}$1${NC}"
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read -p "Do you want to continue? [y/N] " -n 1 -r
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echo
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if [[ ! $REPLY =~ ^[Yy]$ ]]; then
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error "Operation aborted by user"
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fi
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}
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check_prerequisites() {
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log "Checking prerequisites for GRUB repair..."
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# Check if running as root
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if [ "$EUID" -ne 0 ]; then
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error "This script must be run as root. Use: sudo $0"
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fi
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# Check if running from live system
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local root_device=$(df / | tail -1 | awk '{print $1}')
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if [[ "$root_device" != *"loop"* ]] && [[ "$root_device" != *"overlay"* ]] && [[ "$root_device" != *"tmpfs"* ]]; then
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warning "This should be run from a live USB system for safety"
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confirm_action "Continue anyway? (Not recommended if booting from the problematic system)"
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fi
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# Check required tools
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for tool in grub-install update-grub mount umount lvm; do
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if ! command -v $tool >/dev/null 2>&1; then
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error "$tool not found. Please install required packages."
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fi
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done
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success "Prerequisites check passed"
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}
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detect_external_drive() {
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log "Detecting external M.2 drive with LVM..."
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# Check if LVM volume group exists
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if ! vgs "$VG_NAME" >/dev/null 2>&1; then
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# Try to activate volume groups
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vgchange -ay || warning "Could not activate volume groups"
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if ! vgs "$VG_NAME" >/dev/null 2>&1; then
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error "Volume group '$VG_NAME' not found. Is the external drive connected?"
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fi
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fi
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# Display volume group information
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log "Found volume group '$VG_NAME':"
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vgs "$VG_NAME"
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# Check logical volumes
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local required_lvs=("root" "home" "boot")
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for lv in "${required_lvs[@]}"; do
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if ! lvs "$VG_NAME/$lv" >/dev/null 2>&1; then
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error "Logical volume '$VG_NAME/$lv' not found"
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fi
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done
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success "External LVM drive detected successfully"
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}
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mount_external_system() {
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log "Mounting external LVM system..."
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local mount_base="/mnt/ext"
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mkdir -p "$mount_base"
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# Mount in correct order
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log "Mounting root filesystem..."
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mount "/dev/$VG_NAME/root" "$mount_base" || error "Failed to mount root"
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log "Mounting boot filesystem..."
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mkdir -p "$mount_base/boot"
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mount "/dev/$VG_NAME/boot" "$mount_base/boot" || error "Failed to mount boot"
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log "Mounting EFI partition..."
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mkdir -p "$mount_base/boot/efi"
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# Find EFI partition (usually first partition on external drive)
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local efi_partition="${EXTERNAL_DRIVE}1"
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if [ -b "$efi_partition" ]; then
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mount "$efi_partition" "$mount_base/boot/efi" || error "Failed to mount EFI partition"
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else
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error "EFI partition $efi_partition not found"
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fi
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log "Mounting home filesystem..."
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mkdir -p "$mount_base/home"
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mount "/dev/$VG_NAME/home" "$mount_base/home" || error "Failed to mount home"
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success "External system mounted at $mount_base"
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echo "$mount_base"
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}
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repair_grub() {
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local mount_base="$1"
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log "Repairing GRUB bootloader..."
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# Bind mount necessary filesystems for chroot
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log "Setting up chroot environment..."
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mount --bind /dev "$mount_base/dev" || error "Failed to bind /dev"
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mount --bind /proc "$mount_base/proc" || error "Failed to bind /proc"
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mount --bind /sys "$mount_base/sys" || error "Failed to bind /sys"
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mount --bind /run "$mount_base/run" || error "Failed to bind /run"
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# Copy DNS resolution
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cp /etc/resolv.conf "$mount_base/etc/resolv.conf" 2>/dev/null || warning "Could not copy DNS settings"
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log "Updating initramfs to include LVM support..."
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chroot "$mount_base" /bin/bash -c "
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# Ensure LVM is in initramfs
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echo 'GRUB_ENABLE_CRYPTODISK=y' >> /etc/default/grub 2>/dev/null || true
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# Update initramfs with LVM support
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update-initramfs -u -k all
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echo 'Initramfs updated successfully'
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" || warning "Initramfs update had issues"
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log "Reinstalling GRUB bootloader..."
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chroot "$mount_base" /bin/bash -c "
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# Install GRUB to the external drive
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grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=debian --recheck '$EXTERNAL_DRIVE'
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echo 'GRUB installed successfully'
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" || error "GRUB installation failed"
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log "Updating GRUB configuration..."
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chroot "$mount_base" /bin/bash -c "
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# Update GRUB configuration
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update-grub
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echo 'GRUB configuration updated successfully'
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" || error "GRUB configuration update failed"
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success "GRUB repair completed"
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}
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check_grub_files() {
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local mount_base="$1"
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log "Checking GRUB installation..."
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# Check EFI bootloader
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if [ -f "$mount_base/boot/efi/EFI/debian/grubx64.efi" ]; then
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success "GRUB EFI bootloader found"
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else
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warning "GRUB EFI bootloader missing"
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fi
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# Check GRUB configuration
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if [ -f "$mount_base/boot/grub/grub.cfg" ]; then
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success "GRUB configuration found"
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# Check if configuration mentions LVM
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if grep -q "$VG_NAME" "$mount_base/boot/grub/grub.cfg"; then
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success "GRUB configuration includes LVM volumes"
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else
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warning "GRUB configuration may not include LVM setup"
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fi
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else
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error "GRUB configuration missing"
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fi
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}
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cleanup_mounts() {
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local mount_base="$1"
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log "Cleaning up mount points..."
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# Unmount in reverse order
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umount "$mount_base/run" 2>/dev/null || true
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umount "$mount_base/sys" 2>/dev/null || true
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umount "$mount_base/proc" 2>/dev/null || true
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umount "$mount_base/dev" 2>/dev/null || true
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umount "$mount_base/home" 2>/dev/null || true
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umount "$mount_base/boot/efi" 2>/dev/null || true
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umount "$mount_base/boot" 2>/dev/null || true
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umount "$mount_base" 2>/dev/null || true
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# Remove mount directory
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rmdir "$mount_base" 2>/dev/null || true
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success "Mount points cleaned up"
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}
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show_next_steps() {
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echo
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echo -e "${GREEN}=== GRUB Repair Completed ===${NC}"
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echo
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echo -e "${BLUE}Next steps:${NC}"
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echo "1. Reboot your system"
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echo "2. Enter BIOS/UEFI settings"
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echo "3. Ensure boot order prioritizes the external M.2 SSD"
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echo "4. Look for 'debian' entry in the boot menu"
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echo "5. Boot from the external drive"
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echo
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echo -e "${YELLOW}If boot still fails:${NC}"
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echo "• Check BIOS/UEFI settings for Secure Boot (disable if necessary)"
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echo "• Verify UEFI mode is enabled (not Legacy/CSM)"
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echo "• Try different USB ports if using external enclosure"
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echo "• Run this script again from live USB if needed"
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echo
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echo -e "${GREEN}The system should now boot properly from the external M.2!${NC}"
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}
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main() {
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echo -e "${GREEN}=== GRUB Boot Repair for LVM Migration ===${NC}"
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echo "This script repairs GRUB bootloader issues after LVM migration"
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echo
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check_prerequisites
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detect_external_drive
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echo
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echo -e "${YELLOW}This will repair GRUB on the external M.2 drive${NC}"
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echo "Drive: $EXTERNAL_DRIVE"
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echo "Volume Group: $VG_NAME"
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echo
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confirm_action "Proceed with GRUB repair?"
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local mount_base=$(mount_external_system)
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# Set trap to ensure cleanup
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trap "cleanup_mounts '$mount_base'" EXIT
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repair_grub "$mount_base"
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check_grub_files "$mount_base"
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cleanup_mounts "$mount_base"
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# Clear trap since we cleaned up successfully
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trap - EXIT
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show_next_steps
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}
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main "$@" |