diff --git a/backend/converter.py b/backend/converter.py
index 670989e..788f300 100644
--- a/backend/converter.py
+++ b/backend/converter.py
@@ -162,8 +162,14 @@ def _detect_archive_ext(name: str) -> Optional[str]:
 
 def discover_disk(source: Path) -> DiskInfo:
     """Walk the source directory and find the primary disk image."""
+    return _pick_largest(discover_all_disks(source))
+
+
+def discover_all_disks(source: Path) -> list:
+    """Walk the source directory and return all disk images found,
+    sorted by size descending."""
     if source.is_file():
-        return _probe(source)
+        return [_probe(source)]
 
     candidates = []
     for dirpath, _, filenames in os.walk(source):
@@ -175,9 +181,14 @@ def discover_disk(source: Path) -> DiskInfo:
     if not candidates:
         raise FileNotFoundError(f"No disk image found in {source}")
 
-    # Pick largest as primary
     candidates.sort(key=lambda p: p.stat().st_size, reverse=True)
-    return _probe(candidates[0])
+    return [_probe(p) for p in candidates]
+
+
+def _pick_largest(disks: list) -> DiskInfo:
+    if not disks:
+        raise FileNotFoundError("No disks")
+    return disks[0]
 
 
 def _probe(disk_path: Path) -> DiskInfo:
@@ -392,8 +403,10 @@ def _process_analysis(analysis_id: str, vmid: int, source_filename: str):
         source = _extract_nested(source)
 
         _update_analysis(analysis_id, "processing", "Discovering disk image...")
-        disk = discover_disk(source)
+        disks = discover_all_disks(source)
+        disk = disks[0]
         logger.info("Disk found: %s (format=%s, size=%.1f GiB)", disk.path, disk.format, disk.size_gb)
+        logger.info("Total disks discovered: %d", len(disks))
 
         _update_analysis(analysis_id, "processing", "Detecting OS and boot type...")
         extract_dir = source if source.is_dir() else source.parent
@@ -402,6 +415,13 @@ def _process_analysis(analysis_id: str, vmid: int, source_filename: str):
         logger.info("Analysis done: os=%s efi=%s", os_type, efi)
 
         from models import AnalyzeResponse
+        all_disks_data = [{
+            "filename": d.path.name,
+            "format": d.format,
+            "size_gb": d.size_gb,
+            "size_bytes": d.size_bytes,
+        } for d in disks]
+
         result = AnalyzeResponse(
             vmid=vmid,
             filename=disk.path.name,
@@ -409,6 +429,7 @@ def _process_analysis(analysis_id: str, vmid: int, source_filename: str):
             disk_size_gb=disk.size_gb,
             os_type=os_type,
             efi_detectable=efi,
+            all_disks=all_disks_data,
         )
         _update_analysis(analysis_id, "completed", "Analysis complete", result=result.model_dump())
 
diff --git a/backend/models.py b/backend/models.py
index 603ee13..809eaec 100644
--- a/backend/models.py
+++ b/backend/models.py
@@ -106,6 +106,7 @@ class AnalyzeResponse(BaseModel):
     disk_size_gb: float
     os_type: Optional[str] = None
     efi_detectable: Optional[bool] = None
+    all_disks: list = []
 
 
 # ---------------------------------------------------------------------------
diff --git a/frontend/app.py b/frontend/app.py
index 30ae6af..4eeb72f 100644
--- a/frontend/app.py
+++ b/frontend/app.py
@@ -398,13 +398,36 @@ async def confirm_session(
     auto_detect_boot: str = Form("true"),
     boot_type: str = Form("uefi"),
     session_id: str = Form(""),
+    has_multiple_disks: str = Form("0"),
+    boot_disk_index: str = Form("0"),
 ):
     """Build the job payload and submit to the backend."""
-    # Validate VM ID range
     err = _validate_vmid(vmid)
     if err:
         return render("_analysis.html", request=request, error=err)
 
+    # Determine boot disk from multi-disk selection
+    boot_file = source_filename
+    boot_fmt = disk_format
+
+    if has_multiple_disks == "1":
+        idx = int(boot_disk_index) if boot_disk_index.isdigit() else 0
+        form_data = await request.form()
+        boot_file = form_data.get(f"disk_{idx}_file", source_filename)
+        boot_fmt = form_data.get(f"disk_{idx}_fmt", disk_format)
+
+        additional_disks = []
+        for i in range(10):
+            dfile = form_data.get(f"disk_{i}_file")
+            if dfile and i != idx:
+                additional_disks.append({
+                    "disk_type": "image_file",
+                    "source_filename": dfile,
+                    "format": form_data.get(f"disk_{i}_fmt", "vmdk"),
+                })
+    else:
+        additional_disks = []
+
     payload = {
         "vmid": vmid,
         "vm_name": vm_name,
@@ -416,9 +439,10 @@ async def confirm_session(
         "session_id": session_id,
         "boot_disk": {
             "disk_type": "image_file",
-            "source_filename": source_filename,
-            "format": disk_format,
+            "source_filename": boot_file,
+            "format": boot_fmt,
         },
+        "additional_disks": additional_disks,
     }
     if target_disk_size_gb is not None:
         payload["target_disk_size_gb"] = target_disk_size_gb
diff --git a/frontend/templates/_analysis.html b/frontend/templates/_analysis.html
index 83896aa..4646fe5 100644
--- a/frontend/templates/_analysis.html
+++ b/frontend/templates/_analysis.html
@@ -25,6 +25,24 @@
     <tr><td>EFI Bootable</td><td>{{ 'Yes' if analysis.efi_detectable else 'Unknown' }}</td></tr>
   </table>
 
+  {% if analysis.all_disks and analysis.all_disks|length > 1 %}
+  <div style="margin-top:1rem;">
+    <label style="font-size:0.75rem;color:var(--pve-muted);font-weight:600;margin-bottom:0.3rem;display:block;">Disks Found — select boot disk</label>
+    <table class="pve-table">
+      {% for d in analysis.all_disks %}
+      <tr>
+        <td style="width:auto;padding-right:0.5rem;">
+          <input type="radio" name="boot_disk_index" value="{{ loop.index0 }}" {% if loop.first %}checked{% endif %}>
+        </td>
+        <td>{{ d.filename }}</td>
+        <td>{{ d.format }}</td>
+        <td>{{ d.size_gb }} GB</td>
+      </tr>
+      {% endfor %}
+    </table>
+  </div>
+  {% endif %}
+
   <p class="pve-dim" style="margin:0.75rem 0;">Is this correct? Configure the VM below and submit the conversion job.</p>
 
   <form id="confirm-form" data-vmid="{{ vmid }}" data-source-filename="{{ source_filename }}">
@@ -32,6 +50,13 @@
     <input type="hidden" name="source_filename" value="{{ source_filename }}">
     <input type="hidden" name="disk_format" value="{{ analysis.disk_format }}">
     <input type="hidden" name="session_id" value="{{ session_id or '' }}">
+    {% if analysis.all_disks and analysis.all_disks|length > 1 %}
+    <input type="hidden" name="has_multiple_disks" value="1">
+    {% for d in analysis.all_disks %}
+    <input type="hidden" name="disk_{{ loop.index0 }}_file" value="{{ d.filename }}">
+    <input type="hidden" name="disk_{{ loop.index0 }}_fmt" value="{{ d.format }}">
+    {% endfor %}
+    {% endif %}
 
     <div class="pve-row">
       <div class="pve-form-group">