ceb1f6fa4f
- simple_grub_repair.sh: Fixed GRUB boot issue successfully - Direct GRUB installation without chroot complications - Successfully creates debian EFI bootloader - Resolves reset/reboot loop after LVM migration - Tested and confirmed working
85 lines
2.3 KiB
Bash
Executable File
85 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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# Simple GRUB Boot Repair Script
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# Direct GRUB repair without chroot complications
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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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VG_NAME="system-vg"
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EXTERNAL_DRIVE="/dev/sda"
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log() { echo -e "${BLUE}[$(date '+%H:%M:%S')]${NC} $1"; }
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error() { echo -e "${RED}[ERROR]${NC} $1" >&2; exit 1; }
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success() { echo -e "${GREEN}[SUCCESS]${NC} $1"; }
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warning() { echo -e "${YELLOW}[WARNING]${NC} $1"; }
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echo -e "${GREEN}=== Simple GRUB Boot Repair ===${NC}"
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echo
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# Check if running as root
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if [ "$EUID" -ne 0 ]; then
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error "This script must be run as root. Use: sudo $0"
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fi
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log "Mounting external system..."
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mkdir -p /tmp/ext-boot /tmp/ext-efi
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# Mount the boot and EFI partitions
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mount "/dev/$VG_NAME/boot" /tmp/ext-boot || error "Failed to mount boot"
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mount "${EXTERNAL_DRIVE}1" /tmp/ext-efi || error "Failed to mount EFI"
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success "Mounted external boot partitions"
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log "Installing GRUB to external drive..."
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# Install GRUB directly to the external drive
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grub-install --target=x86_64-efi \
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--efi-directory=/tmp/ext-efi \
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--bootloader-id=debian \
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--boot-directory=/tmp/ext-boot \
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--recheck \
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"$EXTERNAL_DRIVE" || error "GRUB installation failed"
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success "GRUB installed successfully"
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log "Checking installation..."
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# Check if GRUB EFI file was created
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if [ -f "/tmp/ext-efi/EFI/debian/grubx64.efi" ]; then
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success "GRUB EFI bootloader created successfully"
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else
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error "GRUB EFI bootloader not found after installation"
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fi
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# List EFI directory contents
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log "EFI boot entries after repair:"
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ls -la /tmp/ext-efi/EFI/ || warning "Could not list EFI entries"
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log "Cleaning up..."
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umount /tmp/ext-boot
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umount /tmp/ext-efi
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rmdir /tmp/ext-boot /tmp/ext-efi
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success "GRUB repair completed!"
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echo
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echo -e "${GREEN}=== Next Steps ===${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. Set boot order to prioritize external M.2 SSD"
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echo "4. Look for 'debian' entry in boot menu"
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echo "5. Boot from external drive"
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echo
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echo -e "${YELLOW}BIOS Settings:${NC}"
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echo "• Disable Secure Boot (if enabled)"
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echo "• Enable UEFI mode (disable Legacy/CSM)"
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echo "• Set external M.2 as first boot device"
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echo
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success "External M.2 should now boot properly!" |