diff --git a/MediaType.cs b/MediaType.cs
index 0079d6452..020e2eaf5 100644
--- a/MediaType.cs
+++ b/MediaType.cs
@@ -787,6 +787,10 @@ namespace Aaru.CommonTypes
         ISO_15286_1024 = 656,
         /// <summary>5,25", M.O., ??????? sectors, 512 bytes/sector, ISO 15286, 4.1Gb/cart</summary>
         ISO_15286_512 = 657,
+        /// <summary>5,25", M.O., 314569 sectors, 1024 bytes/sector, ISO 10089, 650Mb/cart</summary>
+        ISO_10089 = 658,
+        /// <summary>5,25", M.O., ?????? sectors, 512 bytes/sector, ISO 10089, 594Mb/cart</summary>
+        ISO_10089_512 = 659,
         #endregion Magneto-optical, types 630 to 659
 
         #region Other floppy standards, types 660 to 689
diff --git a/MediaTypeFromDevice/FromOdc.cs b/MediaTypeFromDevice/FromOdc.cs
index 7ce4fec76..2414636cc 100644
--- a/MediaTypeFromDevice/FromOdc.cs
+++ b/MediaTypeFromDevice/FromOdc.cs
@@ -128,6 +128,12 @@ namespace Aaru.CommonTypes
                 {
                     switch(blocks)
                     {
+                        case 314569:
+                            AaruConsole.DebugWriteLine("Media detection",
+                                                       "SCSI medium type is {0:X2}h, media has {1} blocks of {2} bytes, setting media type to ISO 10089 conforming 5¼\" magneto-optical.",
+                                                       mediumType, blocks, blockSize);
+
+                            return MediaType.ISO_10089;
                         case 371371:
                             AaruConsole.DebugWriteLine("Media detection",
                                                        "SCSI medium type is {0:X2}h, media has {1} blocks of {2} bytes, setting media type to ECMA-223 conforming 3½\" magneto-optical.",
diff --git a/MediaTypeFromDevice/FromSbc.cs b/MediaTypeFromDevice/FromSbc.cs
index e6b11d2ca..d268d4420 100644
--- a/MediaTypeFromDevice/FromSbc.cs
+++ b/MediaTypeFromDevice/FromSbc.cs
@@ -723,6 +723,12 @@ namespace Aaru.CommonTypes
                                                        mediumType, blocks, blockSize);
 
                             return MediaType.ACORN_35_DS_HD;
+                        case 314569 when mediumType == 0x01 || mediumType == 0x02:
+                            AaruConsole.DebugWriteLine("Media detection",
+                                                       "SCSI medium type is {0:X2}h, media has {1} blocks of {2} bytes, setting media type to ISO 10089 conforming 5¼\" magneto-optical.",
+                                                       mediumType, blocks, blockSize);
+
+                            return MediaType.ISO_10089;
                         case 371371 when mediumType == 0x01 || mediumType == 0x02:
                             AaruConsole.DebugWriteLine("Media detection",
                                                        "SCSI medium type is {0:X2}h, media has {1} blocks of {2} bytes, setting media type to ECMA-223 conforming 3½\" magneto-optical.",
diff --git a/Metadata/Dimensions.cs b/Metadata/Dimensions.cs
index 6d659e73a..51cba8f09 100644
--- a/Metadata/Dimensions.cs
+++ b/Metadata/Dimensions.cs
@@ -203,6 +203,8 @@ namespace Aaru.CommonTypes.Metadata
                 case CommonTypes.MediaType.ISO_15286:
                 case CommonTypes.MediaType.ISO_15286_1024:
                 case CommonTypes.MediaType.ISO_15286_512:
+                case CommonTypes.MediaType.ISO_10089:
+                case CommonTypes.MediaType.ISO_10089_512:
                     // According to ECMA-183 et al
                     dmns.Height          = 153;
                     dmns.HeightSpecified = true;
diff --git a/Metadata/MediaType.cs b/Metadata/MediaType.cs
index b60be8eab..50ef0de6b 100644
--- a/Metadata/MediaType.cs
+++ b/Metadata/MediaType.cs
@@ -870,6 +870,12 @@ namespace Aaru.CommonTypes.Metadata
                     discType    = "5.25\" magneto-optical";
                     discSubType = "ECMA-183";
 
+                    break;
+                case CommonTypes.MediaType.ISO_10089:
+                case CommonTypes.MediaType.ISO_10089_512:
+                    discType    = "5.25\" magneto-optical";
+                    discSubType = "ISO 10089";
+
                     break;
                 case CommonTypes.MediaType.ECMA_184_512:
                 case CommonTypes.MediaType.ECMA_184: