diff --git a/boot_control_android.cc b/boot_control_android.cc
index ec2ca0f..dee5fa8 100644
--- a/boot_control_android.cc
+++ b/boot_control_android.cc
@@ -82,12 +82,24 @@
   return module_->getCurrentSlot();
 }
 
+bool BootControlAndroid::GetPartitionDevice(const std::string& partition_name,
+                                            BootControlInterface::Slot slot,
+                                            bool not_in_payload,
+                                            std::string* device,
+                                            bool* is_dynamic) const {
+  return dynamic_control_->GetPartitionDevice(partition_name,
+                                              slot,
+                                              GetCurrentSlot(),
+                                              not_in_payload,
+                                              device,
+                                              is_dynamic);
+}
 
 bool BootControlAndroid::GetPartitionDevice(const string& partition_name,
-                                            Slot slot,
+                                            BootControlInterface::Slot slot,
                                             string* device) const {
-  return dynamic_control_->GetPartitionDevice(
-      partition_name, slot, GetCurrentSlot(), device);
+  return GetPartitionDevice(
+      partition_name, slot, false /* not_in_payload */, device, nullptr);
 }
 
 bool BootControlAndroid::IsSlotBootable(Slot slot) const {
diff --git a/boot_control_android.h b/boot_control_android.h
index 0b042e3..5009dbd 100644
--- a/boot_control_android.h
+++ b/boot_control_android.h
@@ -46,6 +46,11 @@
   BootControlInterface::Slot GetCurrentSlot() const override;
   bool GetPartitionDevice(const std::string& partition_name,
                           BootControlInterface::Slot slot,
+                          bool not_in_payload,
+                          std::string* device,
+                          bool* is_dynamic) const override;
+  bool GetPartitionDevice(const std::string& partition_name,
+                          BootControlInterface::Slot slot,
                           std::string* device) const override;
   bool IsSlotBootable(BootControlInterface::Slot slot) const override;
   bool MarkSlotUnbootable(BootControlInterface::Slot slot) override;
diff --git a/boot_control_chromeos.cc b/boot_control_chromeos.cc
index 0f47169..da84e99 100644
--- a/boot_control_chromeos.cc
+++ b/boot_control_chromeos.cc
@@ -148,9 +148,11 @@
   return current_slot_;
 }
 
-bool BootControlChromeOS::GetPartitionDevice(const string& partition_name,
-                                             unsigned int slot,
-                                             string* device) const {
+bool BootControlChromeOS::GetPartitionDevice(const std::string& partition_name,
+                                             BootControlInterface::Slot slot,
+                                             bool not_in_payload,
+                                             std::string* device,
+                                             bool* is_dynamic) const {
   // Partition name prefixed with |kPartitionNamePrefixDlc| is a DLC module.
   if (base::StartsWith(partition_name,
                        kPartitionNamePrefixDlc,
@@ -180,9 +182,18 @@
     return false;
 
   *device = part_device;
+  if (is_dynamic) {
+    *is_dynamic = false;
+  }
   return true;
 }
 
+bool BootControlChromeOS::GetPartitionDevice(const string& partition_name,
+                                             BootControlInterface::Slot slot,
+                                             string* device) const {
+  return GetPartitionDevice(partition_name, slot, false, device, nullptr);
+}
+
 bool BootControlChromeOS::IsSlotBootable(Slot slot) const {
   int partition_num = GetPartitionNumber(kChromeOSPartitionNameKernel, slot);
   if (partition_num < 0)
diff --git a/boot_control_chromeos.h b/boot_control_chromeos.h
index 0209052..6edc148 100644
--- a/boot_control_chromeos.h
+++ b/boot_control_chromeos.h
@@ -47,6 +47,11 @@
   BootControlInterface::Slot GetCurrentSlot() const override;
   bool GetPartitionDevice(const std::string& partition_name,
                           BootControlInterface::Slot slot,
+                          bool not_in_payload,
+                          std::string* device,
+                          bool* is_dynamic) const override;
+  bool GetPartitionDevice(const std::string& partition_name,
+                          BootControlInterface::Slot slot,
                           std::string* device) const override;
   bool IsSlotBootable(BootControlInterface::Slot slot) const override;
   bool MarkSlotUnbootable(BootControlInterface::Slot slot) override;
diff --git a/common/boot_control_interface.h b/common/boot_control_interface.h
index 3906e2f..c93de5c 100644
--- a/common/boot_control_interface.h
+++ b/common/boot_control_interface.h
@@ -59,8 +59,18 @@
   // every slot. In order to access the dynamic partitions in the target slot,
   // GetDynamicPartitionControl()->PreparePartitionsForUpdate() must be called
   // (with |update| == true for the first time for a payload, and |false| for
-  // for the rest of the times) prior to calling this function. On success,
-  // returns true and stores the block device in |device|.
+  // for the rest of the times) prior to calling this function.
+  // The handling may be different based on whether the partition is included
+  // in the update payload. On success, returns true; and stores the block
+  // device in |device|, if the partition is dynamic in |is_dynamic|.
+  virtual bool GetPartitionDevice(const std::string& partition_name,
+                                  Slot slot,
+                                  bool not_in_payload,
+                                  std::string* device,
+                                  bool* is_dynamic) const = 0;
+
+  // Overload of the above function. We assume the partition is always included
+  // in the payload.
   virtual bool GetPartitionDevice(const std::string& partition_name,
                                   Slot slot,
                                   std::string* device) const = 0;
diff --git a/common/boot_control_stub.cc b/common/boot_control_stub.cc
index 2eb9211..907f670 100644
--- a/common/boot_control_stub.cc
+++ b/common/boot_control_stub.cc
@@ -35,6 +35,15 @@
   return 0;
 }
 
+bool BootControlStub::GetPartitionDevice(const std::string& partition_name,
+                                         BootControlInterface::Slot slot,
+                                         bool not_in_payload,
+                                         std::string* device,
+                                         bool* is_dynamic) const {
+  LOG(ERROR) << __FUNCTION__ << " should never be called.";
+  return false;
+}
+
 bool BootControlStub::GetPartitionDevice(const string& partition_name,
                                          Slot slot,
                                          string* device) const {
diff --git a/common/boot_control_stub.h b/common/boot_control_stub.h
index cc16190..a1bdb96 100644
--- a/common/boot_control_stub.h
+++ b/common/boot_control_stub.h
@@ -41,6 +41,11 @@
   unsigned int GetNumSlots() const override;
   BootControlInterface::Slot GetCurrentSlot() const override;
   bool GetPartitionDevice(const std::string& partition_name,
+                          Slot slot,
+                          bool not_in_payload,
+                          std::string* device,
+                          bool* is_dynamic) const override;
+  bool GetPartitionDevice(const std::string& partition_name,
                           BootControlInterface::Slot slot,
                           std::string* device) const override;
   bool IsSlotBootable(BootControlInterface::Slot slot) const override;
diff --git a/common/fake_boot_control.h b/common/fake_boot_control.h
index bd9d9ca..adbacd6 100644
--- a/common/fake_boot_control.h
+++ b/common/fake_boot_control.h
@@ -48,7 +48,9 @@
 
   bool GetPartitionDevice(const std::string& partition_name,
                           BootControlInterface::Slot slot,
-                          std::string* device) const override {
+                          bool not_in_payload,
+                          std::string* device,
+                          bool* is_dynamic) const override {
     if (slot >= num_slots_)
       return false;
     auto part_it = devices_[slot].find(partition_name);
@@ -58,6 +60,12 @@
     return true;
   }
 
+  bool GetPartitionDevice(const std::string& partition_name,
+                          BootControlInterface::Slot slot,
+                          std::string* device) const override {
+    return GetPartitionDevice(partition_name, slot, false, device, nullptr);
+  }
+
   bool IsSlotBootable(BootControlInterface::Slot slot) const override {
     return slot < num_slots_ && is_bootable_[slot];
   }
diff --git a/dynamic_partition_control_android.cc b/dynamic_partition_control_android.cc
index a9c2bb3..829e3eb 100644
--- a/dynamic_partition_control_android.cc
+++ b/dynamic_partition_control_android.cc
@@ -886,22 +886,35 @@
     const std::string& partition_name,
     uint32_t slot,
     uint32_t current_slot,
-    std::string* device) {
+    bool not_in_payload,
+    std::string* device,
+    bool* is_dynamic) {
   const auto& partition_name_suffix =
       partition_name + SlotSuffixForSlotNumber(slot);
   std::string device_dir_str;
   TEST_AND_RETURN_FALSE(GetDeviceDir(&device_dir_str));
   base::FilePath device_dir(device_dir_str);
 
+  if (is_dynamic) {
+    *is_dynamic = false;
+  }
+
   // When looking up target partition devices, treat them as static if the
   // current payload doesn't encode them as dynamic partitions. This may happen
   // when applying a retrofit update on top of a dynamic-partitions-enabled
   // build.
   if (GetDynamicPartitionsFeatureFlag().IsEnabled() &&
       (slot == current_slot || is_target_dynamic_)) {
-    switch (GetDynamicPartitionDevice(
-        device_dir, partition_name_suffix, slot, current_slot, device)) {
+    switch (GetDynamicPartitionDevice(device_dir,
+                                      partition_name_suffix,
+                                      slot,
+                                      current_slot,
+                                      not_in_payload,
+                                      device)) {
       case DynamicPartitionDeviceStatus::SUCCESS:
+        if (is_dynamic) {
+          *is_dynamic = true;
+        }
         return true;
       case DynamicPartitionDeviceStatus::TRY_STATIC:
         break;
@@ -920,6 +933,15 @@
   return true;
 }
 
+bool DynamicPartitionControlAndroid::GetPartitionDevice(
+    const std::string& partition_name,
+    uint32_t slot,
+    uint32_t current_slot,
+    std::string* device) {
+  return GetPartitionDevice(
+      partition_name, slot, current_slot, false, device, nullptr);
+}
+
 bool DynamicPartitionControlAndroid::IsSuperBlockDevice(
     const base::FilePath& device_dir,
     uint32_t current_slot,
@@ -936,6 +958,7 @@
     const std::string& partition_name_suffix,
     uint32_t slot,
     uint32_t current_slot,
+    bool not_in_payload,
     std::string* device) {
   std::string super_device =
       device_dir.Append(GetSuperPartitionName(slot)).value();
@@ -975,7 +998,7 @@
     }
   }
 
-  bool force_writable = slot != current_slot;
+  bool force_writable = (slot != current_slot) && !not_in_payload;
   if (MapPartitionOnDeviceMapper(
           super_device, partition_name_suffix, slot, force_writable, device)) {
     return DynamicPartitionDeviceStatus::SUCCESS;
diff --git a/dynamic_partition_control_android.h b/dynamic_partition_control_android.h
index 18a05fb..e3bedbc 100644
--- a/dynamic_partition_control_android.h
+++ b/dynamic_partition_control_android.h
@@ -61,6 +61,13 @@
   bool GetPartitionDevice(const std::string& partition_name,
                           uint32_t slot,
                           uint32_t current_slot,
+                          bool not_in_payload,
+                          std::string* device,
+                          bool* is_dynamic);
+
+  bool GetPartitionDevice(const std::string& partition_name,
+                          uint32_t slot,
+                          uint32_t current_slot,
                           std::string* device);
 
  protected:
@@ -222,6 +229,7 @@
       const std::string& partition_name_suffix,
       uint32_t slot,
       uint32_t current_slot,
+      bool not_in_payload,
       std::string* device);
 
   // Return true if |partition_name_suffix| is a block device of