Fix mount point detection to include partitions

Use lsblk instead of mount command to detect mount points. This
properly detects mounts on partitions (e.g., /dev/sda1) rather
than only whole-device mounts.

- Shows multiple mount points (up to 3) comma-separated
- Correctly identifies BOOT drives with root partition
- Handles NVMe partition naming (nvme0n1p1, etc.)

Fixes: #8

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

driveAtlas.sh

@@ -500,14 +500,21 @@ for bay in $all_bays; do
             osd_id="-"
         fi
 
-        # Check if boot drive
+        # Check mount points using lsblk (includes partitions)
+        # This catches both whole-device mounts and partition mounts (e.g., /dev/sda1)
         usage="-"
-        if mount | grep -q "^/dev/${device}"; then
-            mount_point=$(mount | grep "^/dev/${device}" | awk '{print $3}' | head -1)
-            if [[ "$mount_point" == "/" ]]; then
+        mount_points="$(lsblk -n -o MOUNTPOINT "/dev/$device" 2>/dev/null | grep -v '^$' | head -3 | tr '\n' ',')"
+        mount_points="${mount_points%,}"  # Remove trailing comma
+        if [[ -n "$mount_points" ]]; then
+            if [[ "$mount_points" == *"/"* && ! "$mount_points" == *"/boot"* && ! "$mount_points" == *"/home"* ]]; then
+                # Root filesystem mounted (but not just /boot or /home)
+                if echo "$mount_points" | grep -qE '^/,|^/$|,/$'; then
                     usage="BOOT"
                 else
-                usage="$mount_point"
+                    usage="$mount_points"
+                fi
+            else
+                usage="$mount_points"
             fi
         fi