diff --git a/DiscImageChef.Core/Logging/IBGLog.cs b/DiscImageChef.Core/Logging/IBGLog.cs
index 01bc6b903..7cc8ab02c 100644
--- a/DiscImageChef.Core/Logging/IBGLog.cs
+++ b/DiscImageChef.Core/Logging/IBGLog.cs
@@ -40,25 +40,25 @@ namespace DiscImageChef.Core.Logging
 {
     class IbgLog
     {
-        static FileStream ibgFs;
-        static StringBuilder ibgSb;
-        static DateTime ibgDatePoint;
-        static CultureInfo ibgCulture;
-        static double ibgStartSpeed;
-        static string ibgMediaType;
-        static double ibgDivider;
-        static bool ibgStartSet;
-        static double ibgMaxSpeed;
-        static double ibgIntSpeed;
-        static int ibgSnaps;
-        static ulong ibgIntSector;
-        static int ibgSampleRate;
+        StringBuilder ibgSb;
+        DateTime ibgDatePoint;
+        CultureInfo ibgCulture;
+        double ibgStartSpeed;
+        string ibgMediaType;
+        double ibgDivider;
+        bool ibgStartSet;
+        double ibgMaxSpeed;
+        double ibgIntSpeed;
+        int ibgSnaps;
+        ulong ibgIntSector;
+        int ibgSampleRate;
+        string logFile;
 
         internal IbgLog(string outputFile, ushort currentProfile)
         {
             if(string.IsNullOrEmpty(outputFile)) return;
 
-            ibgFs = new FileStream(outputFile, FileMode.Create);
+            logFile = outputFile;
             ibgSb = new StringBuilder();
             ibgDatePoint = DateTime.Now;
             ibgCulture = new CultureInfo("en-US");
@@ -194,7 +194,7 @@ namespace DiscImageChef.Core.Logging
 
         internal void Write(ulong sector, double currentSpeed)
         {
-            if(ibgFs == null) return;
+            if(logFile == null) return;
 
             ibgIntSpeed += currentSpeed;
             ibgSampleRate += (int)Math.Floor((DateTime.Now - ibgDatePoint).TotalMilliseconds);
@@ -222,8 +222,8 @@ namespace DiscImageChef.Core.Logging
         internal void Close(Device dev, ulong blocks, ulong blockSize, double totalSeconds, double currentSpeed,
                           double averageSpeed, string devicePath)
         {
-            if(ibgFs == null) return;
-
+            if(logFile == null) return;
+            FileStream ibgFs = new FileStream(logFile, FileMode.Create);
             StringBuilder ibgHeader = new StringBuilder();
             string ibgBusType;
 
diff --git a/DiscImageChef.Core/Logging/MHDDLog.cs b/DiscImageChef.Core/Logging/MHDDLog.cs
index 1d7077f3a..cda3635a4 100644
--- a/DiscImageChef.Core/Logging/MHDDLog.cs
+++ b/DiscImageChef.Core/Logging/MHDDLog.cs
@@ -40,14 +40,16 @@ namespace DiscImageChef.Core.Logging
 {
     class MhddLog
     {
-        FileStream mhddFs;
+        MemoryStream mhddFs;
+        string logFile;
 
         internal MhddLog(string outputFile, Device dev, ulong blocks, ulong blockSize, ulong blocksToRead)
         {
             if(dev == null || string.IsNullOrEmpty(outputFile)) return;
 
-            mhddFs = new FileStream(outputFile, FileMode.Create);
-
+            mhddFs = new MemoryStream();
+            logFile = outputFile;
+            
             string mode;
 
             switch(dev.Type)
@@ -123,7 +125,7 @@ namespace DiscImageChef.Core.Logging
 
         internal void Write(ulong sector, double duration)
         {
-            if(mhddFs == null) return;
+            if(logFile == null) return;
 
             byte[] sectorBytes = BitConverter.GetBytes(sector);
             byte[] durationBytes = BitConverter.GetBytes((ulong)(duration * 1000));
@@ -134,7 +136,12 @@ namespace DiscImageChef.Core.Logging
 
         internal void Close()
         {
-            if(mhddFs != null) mhddFs.Close();
+            if(logFile == null) return;
+
+            FileStream fs = new FileStream(logFile, FileMode.Create);
+            mhddFs.WriteTo(fs);
+            mhddFs.Close();
+            fs.Close();
         }
     }
 }
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