diff --git a/MediaTypeFromDevice.cs b/MediaTypeFromDevice.cs
index 2f2c4f0..e4acc7a 100644
--- a/MediaTypeFromDevice.cs
+++ b/MediaTypeFromDevice.cs
@@ -1724,15 +1724,14 @@ namespace Aaru.CommonTypes
                 // MD DATA drives
                 case 0x10 when model.StartsWith("MDM", StringComparison.Ordinal) ||
                                model.StartsWith("MDH", StringComparison.Ordinal):
-                    if(mediumType == 3)
+                    if(blockSize == 2048)
                         return MediaType.MDData;
 
-                    // TODO: Check validity
                     switch(blocks)
                     {
-                        case 112311: return MediaType.MD60;
-                        case 138363: return MediaType.MD74;
-                        case 149373: return MediaType.MD80;
+                        case 57312: return MediaType.MD60;
+                        case 70464: return MediaType.MD74;
+                        case 76096: return MediaType.MD80;
                     }
 
                     return MediaType.MD;