diff --git a/src/Core/System/RootFS/sbin/firmware_upgrade.sh b/src/Core/System/RootFS/sbin/firmware_upgrade.sh
index 089aacbb..734b27e1 100644
--- a/src/Core/System/RootFS/sbin/firmware_upgrade.sh
+++ b/src/Core/System/RootFS/sbin/firmware_upgrade.sh
@@ -36,7 +36,7 @@ fi
 # Global variables
 ENV_FILE=".env"
 if [ -f "$ENV_FILE" ]; then
-    export $(cat "$ENV_FILE" | grep -v '^#' | xargs)
+    export $(xargs < "$ENV_FILE");
 fi
 
 # mountDiskPart: Mounts a disk partition by UUID.
diff --git a/src/Core/System/RootFS/sbin/initial_storage_part_four b/src/Core/System/RootFS/sbin/initial_storage_part_four
index 3e67a660..3eb2d3fc 100644
--- a/src/Core/System/RootFS/sbin/initial_storage_part_four
+++ b/src/Core/System/RootFS/sbin/initial_storage_part_four
@@ -117,9 +117,13 @@ done
 # If the partition was successfully created
 if [ "$resultParted" = "0" ];then
     if [ "$action" = "create" ]; then
-        /sbin/mkfs.ext4 -qF "${partitionFour}"
+        echo " - start mkfs.ext4 $partitionFour...";
+        /sbin/mkfs.ext4 -qF "$partitionFour"
+        echo " - result $?...";
         sleep 5;
-        resize2fs ${partitionFour}
+        echo " - start resize2fs $partitionFour...";
+        resize2fs "$partitionFour"
+        echo " - result $?...";
         sleep 5;
     fi
 
@@ -137,6 +141,7 @@ if [ "$resultParted" = "0" ];then
     if [ "$mountResult" != "0" ]; then
         echo " - start check ${partitionFour}...";
         /sbin/fsck.ext4 -p "$partitionFour";
+        echo " - result $?...";
         mount -t "$type" "${partitionFour}" "$tmp_dir" 2> /dev/null > /dev/null;
         mountResult=$?;
     fi;
diff --git a/src/Core/System/RootFS/sbin/pbx_firmware b/src/Core/System/RootFS/sbin/pbx_firmware
index eeab980b..08fabfc3 100644
--- a/src/Core/System/RootFS/sbin/pbx_firmware
+++ b/src/Core/System/RootFS/sbin/pbx_firmware
@@ -148,10 +148,12 @@ if [ -r "${img_file}" ]; then
     fi
   fi
 
+  part4Action='create';
   if [ -n "$partitionFour" ]; then
     export FS_BACKUP_PART4=fs-backup-part4.img;
     echo " - Start backup fs $FS_BACKUP_PART4 super block for part4 ($partitionFour)"
     dd if="$partitionFour" of="$FS_BACKUP_PART4" bs=1M count=1 >/dev/null 2>&1;
+    part4Action='update';
   fi
 
   echo " - Installing new image on $DISK"
@@ -178,7 +180,7 @@ if [ -r "${img_file}" ]; then
   echo " - The execution of the dd command was finished...";
 
   # Update the partition table
-  /sbin/initial_storage_part_four update "$DISK";
+  /sbin/initial_storage_part_four "$part4Action" "$DISK";
   echo " - Check if it necessary to update 4-th storage partition. The result is ${?}...";
 fi
 
diff --git a/src/Core/System/RootFS/sbin/pbx_replace_fake_img.sh b/src/Core/System/RootFS/sbin/pbx_replace_fake_img.sh
index 8632a0c2..8285b67c 100644
--- a/src/Core/System/RootFS/sbin/pbx_replace_fake_img.sh
+++ b/src/Core/System/RootFS/sbin/pbx_replace_fake_img.sh
@@ -17,31 +17,29 @@
 #
 
 ENV_FILE=".env"
-# vars UUID_STORAGE, UPDATE_IMG_FILE in ENV_FILE
+# vars STORAGE_UUID, UPDATE_IMG_FILE in ENV_FILE
 if [ -f "$ENV_FILE" ]; then
-    export $(cat "$ENV_FILE" | grep -v '^#' | xargs)
+    export $(xargs < "$ENV_FILE");
 fi
 # Задание переменных
 MOUNT_DIR="/mnt"
 STORAGE_DIR="/storage/usbdisk1"
-UPDATE_IMG_FILE_PATH="$UPDATE_IMG_FILE"
-RAW_IMG_FILE="${UPDATE_IMG_FILE_PATH}_D.raw"
-UUID_STORAGE="$STORAGE_UUID"
 FIRMWARE_IMG_PATH="/mnt/firmware.img"
+RAW_IMG_FILE="${UPDATE_IMG_FILE}_D.raw"
 
 # Создание необходимых директорий
 mkdir -p "$MOUNT_DIR" "$STORAGE_DIR"
 
 echo " - mount storage for upgrade"
-mount -rw UUID="$UUID_STORAGE" "$STORAGE_DIR" 2> /dev/null
+mount -rw UUID="$STORAGE_UUID" "$STORAGE_DIR" 2> /dev/null
 MOUNT_RESULT=$?
 if [ "$MOUNT_RESULT" -ne 0 ]; then
-  echo " - Fail mount storage with UUID=$UUID_STORAGE to $STORAGE_DIR ..."
+  echo " - Fail mount storage with UUID=$STORAGE_UUID to $STORAGE_DIR ..."
   exit 1
 fi
 
 echo " - unpack image file to raw format"
-gunzip -c "$UPDATE_IMG_FILE_PATH" > "$RAW_IMG_FILE"
+/bin/busybox gunzip -c "$UPDATE_IMG_FILE" > "$RAW_IMG_FILE"
 loopName="$(losetup --show -f -o 524288 "$RAW_IMG_FILE")"
 
 echo " - mount raw image file"
@@ -55,7 +53,8 @@ fi
 
 if [ -f "$FIRMWARE_IMG_PATH" ]; then
   echo " - replace fake image file";
-  cp "$FIRMWARE_IMG_PATH" "$UPDATE_IMG_FILE_PATH";
+  /bin/busybox md5sum "$FIRMWARE_IMG_PATH" "$UPDATE_IMG_FILE";
+  cp "$FIRMWARE_IMG_PATH" "$UPDATE_IMG_FILE";
 else
   echo " - FAIL replace fake image file";
 fi