diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cf9d9d..7c1f5e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 ## Changelog
 
+### v0.49.0 — slice 10 P2 activation: pending-drive detection + "Újraindítás most" (2026-06-12)
+
+A drive enrolled into a running guest activates only at the next guest boot (the host-side live inject
+is blocked on unprivileged LXC — see felhom-agent v0.26.0). Per the decision: enroll persists (no forced
+reboot), and the customer activates pending drives with one batched restart.
+
+- **Pending detection** (`pendingActivationDrives`): a registered StoragePath whose backing drive the
+  agent reports present+attached but which is NOT a live mount in this container → "pending activation".
+- **Settings UI:** a banner ("N meghajtó aktiválásra vár") with an **"Újraindítás most (~30 mp)"** button
+  (one restart batches all pending drives). `POST /api/storage/activate` → `agentapi.GuestReboot` →
+  agent `POST /guest/reboot`. The reboot takes the controller down too, so the JS reloads after the
+  restart window rather than awaiting the (cut-short) response.
+
 ### v0.48.0 — slice 10 P2C: enroll passes the drive into the guest (passthrough) (2026-06-12)
 
 Pairs with felhom-agent v0.25.0 (`POST /disks/guest-attach`) + the golden's `/mnt:rslave` controller
diff --git a/controller/internal/agentapi/client.go b/controller/internal/agentapi/client.go
index a02571f..c696518 100644
--- a/controller/internal/agentapi/client.go
+++ b/controller/internal/agentapi/client.go
@@ -331,6 +331,15 @@ func (c *Client) GuestAttach(ctx context.Context, where string) error {
 	return err
 }
 
+// GuestReboot reboots THIS guest to activate persisted-but-inactive drive binds (slice 10 P2
+// activation — the host-side live inject is blocked on an unprivileged guest, so a drive enrolled into
+// a running guest activates only at the next boot). The agent runs the reboot detached + returns 202;
+// this guest (and the controller) restarts shortly after. User-triggered ("Újraindítás most").
+func (c *Client) GuestReboot(ctx context.Context) error {
+	_, err := c.post(ctx, "/guest/reboot", struct{}{})
+	return err
+}
+
 // EjectResult mirrors POST /disks/eject (the dependent-guest warning).
 type EjectResult struct {
 	VMID            int    `json:"vmid"`
diff --git a/controller/internal/web/handlers.go b/controller/internal/web/handlers.go
index 9faee58..89a4ac6 100644
--- a/controller/internal/web/handlers.go
+++ b/controller/internal/web/handlers.go
@@ -803,6 +803,9 @@ func (s *Server) settingsData() map[string]interface{} {
 		storageViews = append(storageViews, view)
 	}
 	data["StoragePaths"] = storageViews
+	// Drives enrolled but not yet activated in the guest (slice 10 P2): they need the user-triggered
+	// "Újraindítás most" to take effect (the host-side live inject is blocked on an unprivileged guest).
+	data["PendingDrives"] = s.pendingActivationDrives()
 
 	// Recovery info for emergency section
 	data["RetrievalPassword"] = s.settings.GetRetrievalPassword()
diff --git a/controller/internal/web/storage_handlers.go b/controller/internal/web/storage_handlers.go
index 7fe8292..9c708ba 100644
--- a/controller/internal/web/storage_handlers.go
+++ b/controller/internal/web/storage_handlers.go
@@ -13,6 +13,7 @@ import (
 
 	"gitea.dooplex.hu/admin/felhom-controller/internal/agentapi"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/settings"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/system"
 )
 
 // Guided storage provisioning (rebuilt on the agent-delegated disk model). The controller is a thin
@@ -153,6 +154,44 @@ func (s *Server) runStorageAttach(ctx context.Context, agent diskAgent, device,
 	return storageInitResult{Registered: true, Where: where}, nil
 }
 
+// pendingActivationDrives returns registered storage paths that are NOT yet live-mounted in this
+// container but whose backing drive the agent reports present+attached — enrolled drives waiting for
+// the guest restart that activates their bind (slice 10 P2; the host-side live inject is blocked on an
+// unprivileged guest). The customer activates them with the "Újraindítás most" button (one restart
+// batches all). Best-effort: agent unreachable → none.
+func (s *Server) pendingActivationDrives() []string {
+	paths := s.settings.GetStoragePaths()
+	if len(paths) == 0 {
+		return nil
+	}
+	agent, err := s.agentClient()
+	if err != nil {
+		return nil
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	resp, err := agent.Disks(ctx)
+	if err != nil {
+		return nil
+	}
+	attached := map[string]bool{}
+	for _, d := range resp.Disks {
+		if d.MountPath != "" && d.State == "attached" {
+			attached[d.MountPath] = true
+		}
+	}
+	var pending []string
+	for _, sp := range paths {
+		if sp.Decommissioned {
+			continue
+		}
+		if attached[sp.Path] && !system.IsMountPoint(sp.Path) {
+			pending = append(pending, sp.Path)
+		}
+	}
+	return pending
+}
+
 // registerStoragePath records a freshly-mounted path in the StoragePath registry (schedulable by
 // default) and refreshes the FileBrowser mounts so it's usable immediately.
 func (s *Server) registerStoragePath(where, label string, setDefault bool) error {
@@ -201,6 +240,8 @@ func (s *Server) ServeStorageAPI(w http.ResponseWriter, r *http.Request) {
 		s.handleStorageImpact(w, r)
 	case r.URL.Path == "/api/storage/register" && r.Method == http.MethodPost:
 		s.handleStorageRegister(w, r)
+	case r.URL.Path == "/api/storage/activate" && r.Method == http.MethodPost:
+		s.handleStorageActivate(w, r)
 	default:
 		http.NotFound(w, r)
 	}
@@ -341,6 +382,24 @@ func (s *Server) handleStorageWipe(w http.ResponseWriter, r *http.Request) {
 	writeDiskJSON(w, http.StatusOK, true, "", map[string]any{"device": req.Device, "wiped": fr.Formatted, "durable_id": fr.DurableID})
 }
 
+// handleStorageActivate reboots the guest to activate pending drive binds (slice 10 P2). The agent
+// reboots detached + returns 202; this controller restarts with the guest, so the caller's response
+// may be cut short — the UI handles that and reloads after the restart window.
+func (s *Server) handleStorageActivate(w http.ResponseWriter, r *http.Request) {
+	agent, err := s.agentClient()
+	if err != nil {
+		writeDiskJSON(w, http.StatusServiceUnavailable, false, err.Error(), nil)
+		return
+	}
+	if err := agent.GuestReboot(r.Context()); err != nil {
+		s.logger.Printf("[ERROR] [web] guest reboot (activate pending drives) failed: %v", err)
+		writeDiskJSON(w, http.StatusBadGateway, false, err.Error(), nil)
+		return
+	}
+	s.logger.Printf("[WARN] [web] guest restart requested to activate pending drive binds")
+	writeDiskJSON(w, http.StatusAccepted, true, "", map[string]any{"rebooting": true})
+}
+
 // handleStorageRegister records an ALREADY-mounted, unregistered user-data drive into the StoragePath
 // registry — no format, no eject. It is the natural primary action for a mounted-but-unregistered data
 // drive (e.g. felhom-usb): the customer's intent is to USE the existing data, not wipe it. It reuses
diff --git a/controller/internal/web/templates/settings.html b/controller/internal/web/templates/settings.html
index 98e935b..2086cd0 100644
--- a/controller/internal/web/templates/settings.html
+++ b/controller/internal/web/templates/settings.html
@@ -352,6 +352,15 @@ function pollUntilBack() {
         <a href="/settings/storage/attach" class="btn btn-sm btn-outline">🔗 Meglévő meghajtó csatolása</a>
     </div>
 
+    {{if .PendingDrives}}
+    <div class="alert alert-warning" style="margin-top:1rem">
+        <strong>{{len .PendingDrives}} meghajtó aktiválásra vár.</strong>
+        Az újonnan csatolt adatmeghajtók a vendég rövid (~30 mp) újraindítása után válnak elérhetővé az alkalmazások számára.
+        <div style="margin-top:.6rem"><button class="btn btn-sm btn-primary" id="activate-drives-btn" onclick="activatePendingDrives()">Újraindítás most (~30 mp)</button></div>
+        <div id="activate-result" style="margin-top:.5rem"></div>
+    </div>
+    {{end}}
+
     <div style="margin-top:1.5rem">
         <h4 style="margin-bottom:.25rem">Meghajtók (ügynök nézet)</h4>
         <p class="form-hint" style="margin-bottom:.75rem">A host-ügynök által észlelt meghajtók élő nézete. A meghajtó <strong>szerepkörét</strong> az ügynök saját vizsgálattal állapítja meg: a rendszer- és biztonsági-mentés meghajtók védettek (csak operátori aláírással módosíthatók), a felhasználói adatmeghajtókat Ön kezeli.</p>
@@ -481,6 +490,16 @@ window.__registeredPaths=[{{range .StoragePaths}}{{if .Path}}"{{.Path}}",{{end}}
       location.reload();
     }catch(e){ alert('Hiba: '+e.message); }
   };
+  // Activate pending drive binds by rebooting the guest (~30s). The reboot takes the controller down
+  // too, so the fetch may not resolve — we reload after the restart window regardless.
+  window.activatePendingDrives=function(){
+    if(!confirm('A vendég újraindul (~30 másodperc). Eközben az alkalmazások és a vezérlőpult rövid időre nem elérhetők. Folytatja?')) return;
+    var btn=document.getElementById('activate-drives-btn'); var out=document.getElementById('activate-result');
+    if(btn) btn.disabled=true;
+    if(out) out.innerHTML='<span class="form-hint">Újraindítás folyamatban… az oldal automatikusan újratöltődik.</span>';
+    fetch('/api/storage/activate',{method:'POST',headers:Object.assign({'Content-Type':'application/json'},csrfHeaders())}).catch(function(){});
+    setTimeout(function(){location.reload();}, 45000);
+  };
   window.confirmEject=function(where){
     var name=where.replace(/^\/mnt\//,'');
     openConfirm({title:'Meghajtó leválasztása', mount:where, mountName:name,