diff --git a/MOISCore/src/main/scala/ed/mois/core/storm/StormSim.scala b/MOISCore/src/main/scala/ed/mois/core/storm/StormSim.scala
index 64c0275..0074746 100644
--- a/MOISCore/src/main/scala/ed/mois/core/storm/StormSim.scala
+++ b/MOISCore/src/main/scala/ed/mois/core/storm/StormSim.scala
@@ -45,6 +45,16 @@ abstract class StormSim {
    */
   val printGnu = true
 
+  /** 
+   * Tells the simulator if data should be written to disk.
+   */
+  val writeData = true
+
+  /**
+   * The filename of the output data file. 
+   */
+  val fileName = "data.dat"
+
   /**
    * Overwrite to define the model to be simulated.
    */
@@ -77,8 +87,8 @@ abstract class StormSim {
         println(s"""Simulation '${model.title}' took ${time.toDouble / 1000} seconds and resulted in ${endSim.size} data vectors of size ${endSim.head._2.fields.size}.""")
 
         // Logging
-        if (!endSim.isEmpty) {
-          loggingStrategy.writeStormData(model, endSim)
+        if (!endSim.isEmpty && writeData) {
+          loggingStrategy.writeStormData(fileName, model, endSim)
         }
 
         println("Finished logging to disk, starting Gnuplot.")
diff --git a/MOISCore/src/main/scala/ed/mois/core/util/DataToFileWriter.scala b/MOISCore/src/main/scala/ed/mois/core/util/DataToFileWriter.scala
index 6abb34b..c48f660 100644
--- a/MOISCore/src/main/scala/ed/mois/core/util/DataToFileWriter.scala
+++ b/MOISCore/src/main/scala/ed/mois/core/util/DataToFileWriter.scala
@@ -14,11 +14,11 @@ import scala.collection.immutable.TreeMap
 class DataToFileWriter {
   val fileName = "data.dat"
 
-  val clearOutput = Resource.fromOutputStream(new java.io.FileOutputStream(fileName))
-  clearOutput.write("")
   val output: Output = Resource.fromFile("data.dat")
   
   def writeDataHeader(dh: Array[String]) {
+    val clearOutput = Resource.fromOutputStream(new java.io.FileOutputStream(fileName))
+    clearOutput.write("")
     output.write("t " + dh.mkString(" ") + "\n")
   }
   def writeDataPoints(t0: Double, dps: Array[Any]) {
@@ -28,9 +28,9 @@ class DataToFileWriter {
   	output.write(p._1 + " " + p._2.fields.map(_._2).mkString(" ") + "\n")
   }
 
-  def writeStormData(model: StormModel, d: TreeMap[Double, StormState[_]]) {
+  def writeStormData(fileN: String, model: StormModel, d: TreeMap[Double, StormState[_]]) {
     for {
-      outProcessor <- Resource.fromOutputStream(new java.io.FileOutputStream(fileName)).outputProcessor
+      outProcessor <- Resource.fromOutputStream(new java.io.FileOutputStream(fileN)).outputProcessor
       out = outProcessor.asOutput
     } {
       // Write data header
diff --git a/MOISModels/src/main/scala/ed/mois/models/storm/SampleODESystem.scala b/MOISModels/src/main/scala/ed/mois/models/storm/SampleODESystem.scala
index 1ed375b..28ed23c 100644
--- a/MOISModels/src/main/scala/ed/mois/models/storm/SampleODESystem.scala
+++ b/MOISModels/src/main/scala/ed/mois/models/storm/SampleODESystem.scala
@@ -19,6 +19,7 @@ object SampleODESimRunner extends App {
   val sim = new StormSim {
     override val simulationStrategy = () => new IndepTimeScaleStrategy(50.0, 0.05) {override val debug = false}
     val model = new SampleODEModel
+    override val fileName = "sampleODE.dat"
   }
 
   val results = sim.runSim