diff --git a/assets/DOSBOOT.tevd b/assets/DOSBOOT.tevd
index e564ad3..147c1ec 100644
Binary files a/assets/DOSBOOT.tevd and b/assets/DOSBOOT.tevd differ
diff --git a/assets/DOSBOOT.tevd.original b/assets/DOSBOOT.tevd.original
index e564ad3..147c1ec 100644
Binary files a/assets/DOSBOOT.tevd.original and b/assets/DOSBOOT.tevd.original differ
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
index 03963a8..8a39d73 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
@@ -1,8 +1,7 @@
 package net.torvald.tsvm.peripheral
 
-import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.EntryDirectory
-import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.VDUtil
-import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.toCanonicalString
+import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.*
+import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.VDUtil.checkReadOnly
 import net.torvald.tsvm.VM
 import java.io.*
 import java.util.*
@@ -127,7 +126,12 @@ class TevdDiskDrive(private val vm: VM, private val driveNum: Int, private val t
             val inputData = if (inputData.size != BLOCK_SIZE) ByteArray(BLOCK_SIZE) { if (it < inputData.size) inputData[it] else 0 }
             else inputData
 
-            file.writeBytes(inputData)
+            val creationTime = VDUtil.currentUnixtime
+            DOM.checkReadOnly()
+            val file = EntryFile(BLOCK_SIZE.toLong())
+            file.getContent().appendBytes(inputData)
+
+            DOM.entries[1] = DiskEntry(1, 1, "TEVDBOOT".toByteArray(VM.CHARSET), creationTime, creationTime, file)
 
             fileOpenMode = -1
 
diff --git a/tsvm_executable/src/net/torvald/tsvm/BuildTvdosBootable.kt b/tsvm_executable/src/net/torvald/tsvm/BuildTvdosBootable.kt
index 3b68357..5c51fea 100644
--- a/tsvm_executable/src/net/torvald/tsvm/BuildTvdosBootable.kt
+++ b/tsvm_executable/src/net/torvald/tsvm/BuildTvdosBootable.kt
@@ -43,6 +43,8 @@ fun main(args: Array<String>) {
         disk.checkReadOnly()
 //        disk.checkCapacity(4096)
 
+        it.parentEntryID = 1
+
         (it.contents as EntryFile).let { file ->
             val bytes = file.getContent()
             bytes.appendBytes(ByteArray(4096 - bytes.size.toInt()))