diff --git a/src/main/resources/assets/opencomputers/lang/en_US.lang b/src/main/resources/assets/opencomputers/lang/en_US.lang
index c1796df77..0a8d6c874 100644
--- a/src/main/resources/assets/opencomputers/lang/en_US.lang
+++ b/src/main/resources/assets/opencomputers/lang/en_US.lang
@@ -201,6 +201,8 @@ oc:gui.Chat.WarningRecipes=There were errors loading one or more recipes. Some i
 oc:gui.Chat.WarningSimpleComponent=An addon (yours?) using the §aSimpleComponent§f interface did §esomething wrong§f. Component logic could not be injected. Please check your log file for more information.
 oc:gui.Drive.Managed=Managed
 oc:gui.Drive.Unmanaged=Unmanaged
+oc:gui.Drive.ReadOnlyLock=Lock
+oc:gui.Drive.ReadOnlyLockWarning=§lRead Only§r lock. Cannot be removed unless the drive is wiped.
 oc:gui.Drive.Warning=§lWarning§r: switching modes will result in a loss of all data currently stored on the disk!
 oc:gui.Error.ComponentOverflow=Too many components connected to the computer.
 oc:gui.Error.InternalError=Internal error, please see the log file. This is probably a bug.
@@ -283,6 +285,7 @@ oc:tooltip.diskdrive.CC=ComputerCraft floppies are §asupported§7.
 oc:tooltip.diskdrive=Allows reading and writing floppies. Can be installed in robots to allow inserting floppies later on.
 oc:tooltip.diskdrivemountable=Provides the same functionality as a normal disk drive, but must be installed in a rack.
 oc:tooltip.diskusage=Disk usage: %s/%s Byte
+oc:tooltip.disklocked=Locked by: %s
 oc:tooltip.diskmodemanaged=Mode: Managed
 oc:tooltip.diskmodeunmanaged=Mode: Unmanaged
 oc:tooltip.drone=Drones are light-weight, fast reconnaissance units with limited cargo space.
diff --git a/src/main/resources/assets/opencomputers/textures/gui/drive.png b/src/main/resources/assets/opencomputers/textures/gui/drive.png
index 124e3e294..1f86630b7 100644
Binary files a/src/main/resources/assets/opencomputers/textures/gui/drive.png and b/src/main/resources/assets/opencomputers/textures/gui/drive.png differ
diff --git a/src/main/scala/li/cil/oc/Localization.scala b/src/main/scala/li/cil/oc/Localization.scala
index 0bdd2a18d..0c3ff9947 100644
--- a/src/main/scala/li/cil/oc/Localization.scala
+++ b/src/main/scala/li/cil/oc/Localization.scala
@@ -117,6 +117,10 @@ object Localization {
     def Unmanaged: String = localizeImmediately("gui.Drive.Unmanaged")
 
     def Warning: String = localizeImmediately("gui.Drive.Warning")
+
+    def ReadOnlyLock: String = localizeImmediately("gui.Drive.ReadOnlyLock")
+
+    def LockWarning: String = localizeImmediately("gui.Drive.ReadOnlyLockWarning")
   }
 
   object Raid {
@@ -162,6 +166,8 @@ object Localization {
 
     def Materials: String = localizeImmediately("tooltip.materials")
 
+    def DiskLock(lockInfo: String): String = if (lockInfo.isEmpty) "" else localizeImmediately("tooltip.disklocked", lockInfo)
+
     def Tier(tier: Int): String = localizeImmediately("tooltip.tier", tier.toString)
 
     def PrintBeaconBase: String = localizeImmediately("tooltip.print.BeaconBase")
diff --git a/src/main/scala/li/cil/oc/client/PacketSender.scala b/src/main/scala/li/cil/oc/client/PacketSender.scala
index 61cfe68bb..d740a982d 100644
--- a/src/main/scala/li/cil/oc/client/PacketSender.scala
+++ b/src/main/scala/li/cil/oc/client/PacketSender.scala
@@ -35,6 +35,12 @@ object PacketSender {
     pb.sendToServer()
   }
 
+  def sendDriveLock(): Unit = {
+    val pb = new SimplePacketBuilder(PacketType.DriveLock)
+
+    pb.sendToServer()
+  }
+
   def sendDronePower(e: Drone, power: Boolean) {
     val pb = new SimplePacketBuilder(PacketType.DronePower)
 
diff --git a/src/main/scala/li/cil/oc/client/gui/Drive.scala b/src/main/scala/li/cil/oc/client/gui/Drive.scala
index 539d2ee0c..800d898f3 100644
--- a/src/main/scala/li/cil/oc/client/gui/Drive.scala
+++ b/src/main/scala/li/cil/oc/client/gui/Drive.scala
@@ -10,19 +10,21 @@ import net.minecraft.entity.player.InventoryPlayer
 import net.minecraft.item.ItemStack
 
 class Drive(playerInventory: InventoryPlayer, val driveStack: () => ItemStack) extends GuiScreen with traits.Window {
-  override val windowHeight = 85
+  override val windowHeight = 120
 
   override def backgroundImage = Textures.GUI.Drive
 
   protected var managedButton: ImageButton = _
   protected var unmanagedButton: ImageButton = _
+  protected var lockedButton: ImageButton = _
 
   protected override def actionPerformed(button: GuiButton) {
     if (button.id == 0) {
       ClientPacketSender.sendDriveMode(false)
-    }
-    if (button.id == 1) {
+    } else if (button.id == 1) {
       ClientPacketSender.sendDriveMode(true)
+    } else if (button.id == 2) {
+      ClientPacketSender.sendDriveLock()
     }
   }
 
@@ -30,18 +32,24 @@ class Drive(playerInventory: InventoryPlayer, val driveStack: () => ItemStack) e
     super.initGui()
     managedButton = new ImageButton(0, guiLeft + 11, guiTop + 11, 74, 18, Textures.GUI.ButtonDriveMode, text = Localization.Drive.Managed, textColor = 0x608060, canToggle = true)
     unmanagedButton = new ImageButton(1, guiLeft + 91, guiTop + 11, 74, 18, Textures.GUI.ButtonDriveMode, text = Localization.Drive.Unmanaged, textColor = 0x608060, canToggle = true)
+    lockedButton = new ImageButton(2, guiLeft + 11, guiTop + windowHeight - 42, 44, 18, Textures.GUI.ButtonDriveMode, text = Localization.Drive.ReadOnlyLock, textColor = 0x608060, canToggle = true)
     add(buttonList, managedButton)
     add(buttonList, unmanagedButton)
+    add(buttonList, lockedButton)
   }
 
   override def updateScreen(): Unit = {
-    unmanagedButton.toggled = new DriveData(driveStack()).isUnmanaged
+    val data = new DriveData(driveStack())
+    unmanagedButton.toggled = data.isUnmanaged
     managedButton.toggled = !unmanagedButton.toggled
+    lockedButton.toggled = data.isLocked
+    lockedButton.enabled = !data.isLocked
     super.updateScreen()
   }
 
   override def drawScreen(mouseX: Int, mouseY: Int, dt: Float): Unit = {
     super.drawScreen(mouseX, mouseY, dt)
-    fontRenderer.drawSplitString(Localization.Drive.Warning, guiLeft + 7, guiTop + 37, xSize - 16, 0x404040)
+    fontRenderer.drawSplitString(Localization.Drive.Warning, guiLeft + 11, guiTop + 37, xSize - 20, 0x404040)
+    fontRenderer.drawSplitString(Localization.Drive.LockWarning, guiLeft + 61, guiTop + windowHeight - 48, xSize - 68, 0x404040)
   }
 }
diff --git a/src/main/scala/li/cil/oc/common/PacketType.scala b/src/main/scala/li/cil/oc/common/PacketType.scala
index 9ea852788..662aaeb29 100644
--- a/src/main/scala/li/cil/oc/common/PacketType.scala
+++ b/src/main/scala/li/cil/oc/common/PacketType.scala
@@ -73,6 +73,7 @@ object PacketType extends Enumeration {
   // Client -> Server
   ComputerPower,
   CopyToAnalyzer,
+  DriveLock,
   DriveMode,
   DronePower,
   KeyDown,
diff --git a/src/main/scala/li/cil/oc/common/item/data/DriveData.scala b/src/main/scala/li/cil/oc/common/item/data/DriveData.scala
index c4cbc59ed..68e10b5e2 100644
--- a/src/main/scala/li/cil/oc/common/item/data/DriveData.scala
+++ b/src/main/scala/li/cil/oc/common/item/data/DriveData.scala
@@ -11,14 +11,24 @@ class DriveData extends ItemData(null) {
   }
 
   var isUnmanaged = false
+  var lockInfo: String = ""
+
+  def isLocked: Boolean = {
+    lockInfo != null && !lockInfo.isEmpty
+  }
 
   private final val UnmanagedTag = Settings.namespace + "unmanaged"
+  private val LockTag = Settings.namespace + "lock"
 
   override def load(nbt: NBTTagCompound) {
     isUnmanaged = nbt.getBoolean(UnmanagedTag)
+    lockInfo = if (nbt.hasKey(LockTag)) {
+      nbt.getString(LockTag)
+    } else ""
   }
 
   override def save(nbt: NBTTagCompound) {
     nbt.setBoolean(UnmanagedTag, isUnmanaged)
+    nbt.setString(LockTag, lockInfo)
   }
 }
diff --git a/src/main/scala/li/cil/oc/common/item/traits/FileSystemLike.scala b/src/main/scala/li/cil/oc/common/item/traits/FileSystemLike.scala
index baf54b544..8af4dacb1 100644
--- a/src/main/scala/li/cil/oc/common/item/traits/FileSystemLike.scala
+++ b/src/main/scala/li/cil/oc/common/item/traits/FileSystemLike.scala
@@ -6,6 +6,7 @@ import li.cil.oc.Localization
 import li.cil.oc.OpenComputers
 import li.cil.oc.Settings
 import li.cil.oc.common.GuiType
+import li.cil.oc.common.item.data.DriveData
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.item.ItemStack
 import net.minecraft.util.ActionResult
@@ -34,7 +35,9 @@ trait FileSystemLike extends Delegate {
           }
         }
       }
-      tooltip.add(Localization.Tooltip.DiskMode(nbt.getBoolean(Settings.namespace + "unmanaged")))
+      val data = new DriveData(stack)
+      tooltip.add(Localization.Tooltip.DiskMode(data.isUnmanaged))
+      tooltip.add(Localization.Tooltip.DiskLock(data.lockInfo))
     }
     super.tooltipLines(stack, player, tooltip, advanced)
   }
diff --git a/src/main/scala/li/cil/oc/integration/opencomputers/DriverFileSystem.scala b/src/main/scala/li/cil/oc/integration/opencomputers/DriverFileSystem.scala
index ad4b03409..9c431ecc6 100644
--- a/src/main/scala/li/cil/oc/integration/opencomputers/DriverFileSystem.scala
+++ b/src/main/scala/li/cil/oc/integration/opencomputers/DriverFileSystem.scala
@@ -72,10 +72,13 @@ object DriverFileSystem extends Item {
       val sound = Settings.resourceDomain + ":" + (if (isFloppy) "floppy_access" else "hdd_access")
       val drive = new DriveData(stack)
       val environment = if (drive.isUnmanaged) {
-        new Drive(capacity max 0, platterCount, label, Option(host), Option(sound), speed)
+        new Drive(capacity max 0, platterCount, label, Option(host), Option(sound), speed, drive.isLocked)
       }
       else {
-        val fs = oc.api.FileSystem.fromSaveDirectory(address, capacity max 0, Settings.get.bufferChanges)
+        var fs = oc.api.FileSystem.fromSaveDirectory(address, capacity max 0, Settings.get.bufferChanges)
+        if (drive.isLocked) {
+          fs = oc.api.FileSystem.asReadOnly(fs)
+        }
         oc.api.FileSystem.asManagedEnvironment(fs, label, host, sound, speed)
       }
       if (environment != null && environment.node != null) {
diff --git a/src/main/scala/li/cil/oc/server/PacketHandler.scala b/src/main/scala/li/cil/oc/server/PacketHandler.scala
index d1574025c..57e5d51b2 100644
--- a/src/main/scala/li/cil/oc/server/PacketHandler.scala
+++ b/src/main/scala/li/cil/oc/server/PacketHandler.scala
@@ -35,6 +35,7 @@ object PacketHandler extends CommonPacketHandler {
     p.packetType match {
       case PacketType.ComputerPower => onComputerPower(p)
       case PacketType.CopyToAnalyzer => onCopyToAnalyzer(p)
+      case PacketType.DriveLock => onDriveLock(p)
       case PacketType.DriveMode => onDriveMode(p)
       case PacketType.DronePower => onDronePower(p)
       case PacketType.KeyDown => onKeyDown(p)
@@ -85,13 +86,37 @@ object PacketHandler extends CommonPacketHandler {
     }
   }
 
+  def onDriveLock(p: PacketParser): Unit = p.player match {
+    case player: EntityPlayerMP =>
+      val heldItem = player.getHeldItem(EnumHand.MAIN_HAND)
+      Delegator.subItem(heldItem) match {
+        case Some(drive: FileSystemLike) =>
+          val data = new DriveData(heldItem)
+          if (!data.isLocked) {
+            data.lockInfo = player.getName match {
+              case name: String if name != null && !name.isEmpty => name
+              case _ => "notch" // meaning: "unknown"
+            }
+            data.save(heldItem)
+          }
+        case _ => // Invalid packet
+      }
+    case _ => // Invalid Packet
+  }
+
   def onDriveMode(p: PacketParser): Unit = p.player match {
     case player: EntityPlayerMP =>
-      Delegator.subItem(player.getHeldItem(EnumHand.MAIN_HAND)) match {
+      val heldItem = player.getHeldItem(EnumHand.MAIN_HAND)
+      Delegator.subItem(heldItem) match {
         case Some(drive: FileSystemLike) =>
-          val data = new DriveData(player.getHeldItem(EnumHand.MAIN_HAND))
-          data.isUnmanaged = p.readBoolean()
-          data.save(player.getHeldItem(EnumHand.MAIN_HAND))
+          val data = new DriveData(heldItem)
+          val newIsUnmanaged = p.readBoolean()
+          if (data.isUnmanaged != newIsUnmanaged) {
+            fs.FileSystem.removeAddress(heldItem)
+            data.lockInfo = ""
+          }
+          data.isUnmanaged = newIsUnmanaged
+          data.save(heldItem)
         case _ => // Invalid packet.
       }
     case _ => // Invalid packet.
diff --git a/src/main/scala/li/cil/oc/server/component/Drive.scala b/src/main/scala/li/cil/oc/server/component/Drive.scala
index d0e3ab33d..b62bb350b 100644
--- a/src/main/scala/li/cil/oc/server/component/Drive.scala
+++ b/src/main/scala/li/cil/oc/server/component/Drive.scala
@@ -29,7 +29,7 @@ import net.minecraftforge.common.DimensionManager
 
 import scala.collection.convert.WrapAsJava._
 
-class Drive(val capacity: Int, val platterCount: Int, val label: Label, host: Option[EnvironmentHost], val sound: Option[String], val speed: Int) extends AbstractManagedEnvironment with DeviceInfo {
+class Drive(val capacity: Int, val platterCount: Int, val label: Label, host: Option[EnvironmentHost], val sound: Option[String], val speed: Int, val isLocked: Boolean) extends AbstractManagedEnvironment with DeviceInfo {
   override val node = Network.newNode(this, Visibility.Network).
     withComponent("drive", Visibility.Neighbors).
     withConnector().
@@ -75,6 +75,7 @@ class Drive(val capacity: Int, val platterCount: Int, val label: Label, host: Op
 
   @Callback(doc = """function(value:string):string -- Sets the label of the drive. Returns the new value, which may be truncated.""")
   def setLabel(context: Context, args: Arguments): Array[AnyRef] = this.synchronized {
+    if (isLocked) throw new Exception("drive is read only")
     if (label == null) throw new Exception("drive does not support labeling")
     if (args.checkAny(0) == null) label.setLabel(null)
     else label.setLabel(args.checkString(0))
@@ -102,6 +103,7 @@ class Drive(val capacity: Int, val platterCount: Int, val label: Label, host: Op
 
   @Callback(direct = true, doc = """function(sector:number, value:string) -- Write the specified contents to the specified sector.""")
   def writeSector(context: Context, args: Arguments): Array[AnyRef] = this.synchronized {
+    if (isLocked) throw new Exception("drive is read only")
     context.consumeCallBudget(writeSectorCosts(speed))
     val sectorData = args.checkByteArray(1)
     val sector = moveToSector(context, checkSector(args, 0))
@@ -121,6 +123,7 @@ class Drive(val capacity: Int, val platterCount: Int, val label: Label, host: Op
 
   @Callback(direct = true, doc = """function(offset:number, value:number) -- Write a single byte to the specified offset.""")
   def writeByte(context: Context, args: Arguments): Array[AnyRef] = this.synchronized {
+    if (isLocked) throw new Exception("drive is read only")
     context.consumeCallBudget(writeByteCosts(speed))
     val offset = args.checkInteger(0) - 1
     val value = args.checkInteger(1).toByte
diff --git a/src/main/scala/li/cil/oc/server/fs/FileSystem.scala b/src/main/scala/li/cil/oc/server/fs/FileSystem.scala
index ddd1ea2fc..8e50dd179 100755
--- a/src/main/scala/li/cil/oc/server/fs/FileSystem.scala
+++ b/src/main/scala/li/cil/oc/server/fs/FileSystem.scala
@@ -11,6 +11,8 @@ import li.cil.oc.Settings
 import li.cil.oc.api
 import li.cil.oc.api.fs.Label
 import li.cil.oc.api.network.EnvironmentHost
+import li.cil.oc.common.item.Delegator
+import li.cil.oc.common.item.traits.FileSystemLike
 import li.cil.oc.server.component
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.NBTTagCompound
@@ -110,6 +112,23 @@ object FileSystem extends api.detail.FileSystemAPI {
     else null
   }
 
+  def removeAddress(fsStack: ItemStack): Boolean = {
+    Delegator.subItem(fsStack) match {
+      case Some(drive: FileSystemLike) => {
+        val data = li.cil.oc.integration.opencomputers.Item.dataTag(fsStack)
+        if (data.hasKey("node")) {
+          val nodeData = data.getCompoundTag("node")
+          if (nodeData.hasKey("address")) {
+            nodeData.removeTag("address")
+            return true
+          }
+        }
+      }
+      case _ =>
+    }
+    false
+  }
+
   def fromMemory(capacity: Long): api.fs.FileSystem = new RamFileSystem(capacity)
 
   override def asReadOnly(fileSystem: api.fs.FileSystem) =