Initial commit: Complete LVM migration toolset with fixes

- Fixed partition size calculation bugs in migrate_to_lvm.sh
- Added comprehensive error handling for USB drive stability
- Optimized data copy operations using cp -a for better performance
- Corrected mount point detection for encrypted home partitions
- Enhanced drive detection and exclusion logic
- Added proper size override mechanisms for manual intervention
- Improved filesystem creation and validation processes
- Complete toolset for external M.2 drive migration scenarios

Tested successfully on:
- Debian 13 Trixie Live USB environment
- 476GB external M.2 drives via USB 3.0
- Complex partition layouts (root/home/EFI + encryption)
- Large data transfers (314GB+ encrypted home directories)

lvm-migration-tools/access_tools.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+# Mount backup tools partition and provide easy access
+# Use this when booted from the external M.2 SSD
+
+set -e
+
+# Colors
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+print_info() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+print_success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}[WARNING]${NC} $1"
+}
+
+echo ""
+echo "=========================================="
+echo "  Backup Tools Access Helper"
+echo "=========================================="
+echo ""
+
+# Try to find backup tools partition
+TOOLS_PARTITION=$(blkid -L "BACKUP_TOOLS" 2>/dev/null || echo "")
+
+if [[ -z "$TOOLS_PARTITION" ]]; then
+    print_warning "Backup tools partition not found by label."
+    print_info "Searching for tools partition..."
+    
+    # Look for small partitions that might be our tools partition
+    while IFS= read -r line; do
+        partition=$(echo "$line" | awk '{print $1}')
+        size=$(echo "$line" | awk '{print $4}')
+        
+        # Check if it's a small partition (likely tools)
+        if [[ "$size" == *M ]] && [[ ${size%M} -le 1024 ]]; then
+            print_info "Found potential tools partition: $partition ($size)"
+            TOOLS_PARTITION="/dev/$partition"
+            break
+        fi
+    done < <(lsblk -n -o NAME,SIZE | grep -E "sd|nvme.*p")
+fi
+
+if [[ -z "$TOOLS_PARTITION" ]]; then
+    echo "❌ Could not find backup tools partition"
+    echo ""
+    echo "Available partitions:"
+    lsblk
+    echo ""
+    echo "To manually mount tools:"
+    echo "1. Identify the tools partition from the list above"
+    echo "2. sudo mkdir -p /mnt/backup_tools"
+    echo "3. sudo mount /dev/[partition] /mnt/backup_tools"
+    echo "4. cd /mnt/backup_tools/backup_system"
+    echo "5. ./launch_backup_tools.sh"
+    exit 1
+fi
+
+# Create mount point
+MOUNT_POINT="/mnt/backup_tools"
+print_info "Creating mount point: $MOUNT_POINT"
+sudo mkdir -p "$MOUNT_POINT"
+
+# Mount tools partition
+print_info "Mounting tools partition: $TOOLS_PARTITION"
+if sudo mount "$TOOLS_PARTITION" "$MOUNT_POINT"; then
+    print_success "Tools partition mounted successfully"
+else
+    echo "❌ Failed to mount tools partition"
+    exit 1
+fi
+
+# Check if backup system exists
+if [[ -d "$MOUNT_POINT/backup_system" ]]; then
+    print_success "Backup tools found!"
+    
+    cd "$MOUNT_POINT/backup_system"
+    
+    echo ""
+    echo "📁 Backup tools are now available at:"
+    echo "   $MOUNT_POINT/backup_system"
+    echo ""
+    echo "🚀 Available commands:"
+    echo "   ./launch_backup_tools.sh    - Interactive menu"
+    echo "   ./backup_script.sh --help   - Command line help"
+    echo "   python3 backup_manager.py   - GUI (if available)"
+    echo "   ./create_desktop_entry.sh   - Create desktop shortcut"
+    echo ""
+    
+    # Ask what to do
+    read -p "Launch backup tools now? (y/n): " launch
+    if [[ "$launch" =~ ^[Yy] ]]; then
+        ./launch_backup_tools.sh
+    else
+        echo ""
+        echo "Tools are ready to use. Change to the tools directory:"
+        echo "cd $MOUNT_POINT/backup_system"
+    fi
+    
+else
+    print_warning "Backup system not found in tools partition"
+    echo ""
+    echo "Contents of tools partition:"
+    ls -la "$MOUNT_POINT"
+fi