diff --git a/DiscImageChef.CommonTypes/MediaType.cs b/DiscImageChef.CommonTypes/MediaType.cs
index 4a237dde..f0d7b663 100644
--- a/DiscImageChef.CommonTypes/MediaType.cs
+++ b/DiscImageChef.CommonTypes/MediaType.cs
@@ -561,6 +561,12 @@ namespace DiscImageChef.CommonTypes
         CompactCassette = 360,
         Data8 = 361,
         MiniDV = 362,
+        /// <summary>D/CAS-25: Digital data on Compact Cassette form factor, special magnetic media, 9-track</summary>
+        Dcas25 = 363,
+        /// <summary>D/CAS-85: Digital data on Compact Cassette form factor, special magnetic media, 17-track</summary>
+        Dcas85 = 364,
+        /// <summary>D/CAS-103: Digital data on Compact Cassette form factor, special magnetic media, 21-track</summary>
+        Dcas103 = 365,
         #endregion Audio media, types 360 to 369
 
         #region CompactFlash Association, types 370 to 379
diff --git a/DiscImageChef.Metadata/Dimensions.cs b/DiscImageChef.Metadata/Dimensions.cs
index 432e0376..51bf4d7b 100644
--- a/DiscImageChef.Metadata/Dimensions.cs
+++ b/DiscImageChef.Metadata/Dimensions.cs
@@ -745,6 +745,9 @@ namespace DiscImageChef.Metadata
                     dmns.Thickness = 25.4;
                     return dmns;
                 case CommonTypes.MediaType.CompactCassette:
+                case CommonTypes.MediaType.Dcas25:
+                case CommonTypes.MediaType.Dcas85:
+                case CommonTypes.MediaType.Dcas103:
                     dmns.Height = 63.5;
                     dmns.HeightSpecified = true;
                     dmns.Width = 128;
diff --git a/DiscImageChef.Metadata/MediaType.cs b/DiscImageChef.Metadata/MediaType.cs
index 8870eb54..5906fdc3 100644
--- a/DiscImageChef.Metadata/MediaType.cs
+++ b/DiscImageChef.Metadata/MediaType.cs
@@ -1453,9 +1453,21 @@ namespace DiscImageChef.Metadata
                     discSubType = "HuCard";
                     break;
                 case CommonTypes.MediaType.CompactCassette:
-                    discType = "Compact Cassette";
+                    discType    = "Compact Cassette";
                     discSubType = "Compact Cassette";
                     break;
+                case CommonTypes.MediaType.Dcas25:
+                    discType    = "Compact Cassette";
+                    discSubType = "D/CAS-25";
+                    break;
+                case CommonTypes.MediaType.Dcas85:
+                    discType    = "Compact Cassette";
+                    discSubType = "D/CAS-85";
+                    break;
+                case CommonTypes.MediaType.Dcas103:
+                    discType    = "Compact Cassette";
+                    discSubType = "D/CAS-103";
+                    break;
                 case CommonTypes.MediaType.PCCardTypeI:
                     discType = "PCMCIA Card";
                     discSubType = "PC-Card Type I";
diff --git a/templates/dicformat.bt b/templates/dicformat.bt
index 74b272cc..25134d58 100644
--- a/templates/dicformat.bt
+++ b/templates/dicformat.bt
@@ -258,6 +258,9 @@ enum <uint> MediaType
     CompactCassette = 360,
     Data8 = 361,
     MiniDV = 362,
+    Dcas25 = 363,
+    Dcas85 = 364,
+    Dcas103 = 365,
 
     CFast = 370,
     CompactFlash = 371,