diff --git a/virtualbox.sh b/virtualbox.sh
index 6395694..41e79d8 100644
--- a/virtualbox.sh
+++ b/virtualbox.sh
@@ -87,6 +87,12 @@
 # Create a hdd disk.
     VBoxManage createmedium disk --filename hdddisk.vdi --size 2048 --format VDI --variant Standard
 
+# Compact a hdd disk.
+    VBoxManage modifymedium hdddisk.vdi --compact
+
+# Change hdd disk uuid.
+    VBoxManage internalcommands sethduuid hdddisk.vdi
+
 # Add hdd to vm.
     VBoxManage storageattach VMNAME --storagectl sata --port 0 --type hdd --mtype normal --medium FILENAME.vdi
 
@@ -112,9 +118,6 @@
 # Boot from hdd only.
     VBoxManage modifyvm VMNAME --boot1 disk --boot2 none --boot3 none --boot4 none
 
-# Compact a hdd.
-    VBoxManage modifymedium FILENAME.vdi --compact
-
 
 #----- Serial port to host pipe -----