diff --git a/lib/TerranVirtualDisk-src.jar b/lib/TerranVirtualDisk-src.jar
index 65a4af4..c09865f 100644
Binary files a/lib/TerranVirtualDisk-src.jar and b/lib/TerranVirtualDisk-src.jar differ
diff --git a/lib/TerranVirtualDisk.jar b/lib/TerranVirtualDisk.jar
index 926b1c1..9e592a5 100644
Binary files a/lib/TerranVirtualDisk.jar and b/lib/TerranVirtualDisk.jar differ
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
index c9aae3f..4cc362b 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
@@ -63,7 +63,7 @@ class TevdDiskDrive(private val vm: VM, private val driveNum: Int, theTevdPath:
         if (DBGPRN) println("[TevDiskDrive] $msg")
     }
 
-    private val DOM = ClusteredFormatDOM(RandomAccessFile(theTevdPath, "rw"))
+    private val DOM = ClusteredFormatDOM(RandomAccessFile(theTevdPath, "rwd"))
 
     private var fileOpen = false
     private var fileOpenMode = -1 // 1: 'W", 2: 'A'