diff --git a/src/datastore_mad/remotes/downloader.sh b/src/datastore_mad/remotes/downloader.sh
index dcdee6ac79..dc927270cb 100755
--- a/src/datastore_mad/remotes/downloader.sh
+++ b/src/datastore_mad/remotes/downloader.sh
@@ -224,7 +224,7 @@ function get_rbd_cmd
     echo "ssh '$(esc_sq "$DST_HOST")' \"$RBD export '$(esc_sq "$SOURCE")' -\""
 }
 
-TEMP=`getopt -o m:s:l:c:n -l md5:,sha1:,limit:,max-size:,nodecomp -- "$@"`
+TEMP=`getopt -o m:s:l:c:n -l md5:,sha1:,limit:,max-size:,convert:,nodecomp -- "$@"`
 
 if [ $? != 0 ] ; then
     echo "Arguments error" >&2
@@ -257,6 +257,10 @@ while true; do
             export MAX_SIZE="$2"
             shift 2
             ;;
+        --convert)
+            export CONVERT="$2"
+            shift 2
+            ;;
         --)
             shift
             break
@@ -389,7 +393,24 @@ if [ -n "$HASH_TYPE" ]; then
     fi
 fi
 
+function convert_image
+{
+    original_type=$(qemu-img info $TO | grep "^file format:" | awk '{print $3}' || :)
+    if [ "$CONVERT" != "$original_type" ]; then
+        tmpimage=$TO".tmp"
+        qemu-img convert -f $original_type -O $CONVERT $TO $tmpimage
+        mv $tmpimage $TO
+    fi
+}
+
 # Unarchive only if the destination is filesystem
 if [ "$TO" != "-" ]; then
     unarchive "$TO"
-fi
+
+    if [ -n "$CONVERT" ] && [ -f "$TO" ]; then
+        convert_image
+    fi
+
+elif [ -n "$CONVERT" ]; then
+    convert_image
+fi
\ No newline at end of file
diff --git a/src/datastore_mad/remotes/vcenter/cp b/src/datastore_mad/remotes/vcenter/cp
index 2c26df49f7..32c675fbd0 100755
--- a/src/datastore_mad/remotes/vcenter/cp
+++ b/src/datastore_mad/remotes/vcenter/cp
@@ -92,6 +92,7 @@ if VCenterDriver::FileHelper.is_remote_or_needs_unpack?(img_path)
     downsh_args << "--sha1 #{sha1} " if sha1 && !sha1.empty?
     downsh_args << "--nodecomp " if nodecomp && !nodecomp.empty?
     downsh_args << "--limit #{limit_bw} " if limit_bw && !limit_bw.empty?
+    downsh_args << '--convert vmdk'
 
     downloader = "#{File.dirname(__FILE__)}/../downloader.sh #{downsh_args}"
 
@@ -164,6 +165,6 @@ files_to_upload.each_with_index do |f, index|
         FileUtils.rm_rf(temp_file) if temp_file
         exit(-1)
     end
-end
 
+end
 FileUtils.rm_rf(temp_file) if temp_file
diff --git a/src/vmm_mad/remotes/lib/vcenter_driver/datastore.rb b/src/vmm_mad/remotes/lib/vcenter_driver/datastore.rb
index 48d7739ad7..1c7ee0aa30 100644
--- a/src/vmm_mad/remotes/lib/vcenter_driver/datastore.rb
+++ b/src/vmm_mad/remotes/lib/vcenter_driver/datastore.rb
@@ -183,6 +183,7 @@ class Storage
 
     def to_one(ds_hash, vcenter_uuid, dc_name, dc_ref)
         one = ""
+        one << "DRIVER=\"vcenter\"\n"
         one << "NAME=\"#{ds_hash[:name]}\"\n"
         one << "TM_MAD=vcenter\n"
         one << "VCENTER_INSTANCE_ID=\"#{vcenter_uuid}\"\n"