diff --git a/lib/TerranVirtualDisk-src.jar b/lib/TerranVirtualDisk-src.jar
index 7626feb..26a7087 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 39a526d..81c26a7 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 ff2a4b9..b5d7c39 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdDiskDrive.kt
@@ -1,6 +1,8 @@
 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.tsvm.VM
 import java.io.*
 import java.util.*
@@ -141,6 +143,8 @@ class TevdDiskDrive(private val vm: VM, private val driveNum: Int, private val t
         else {
             val inputString = inputData.trimNull().toString(VM.CHARSET)
 
+            println("[TevDiskDrive] inputString=$inputString")
+
             if (inputString.startsWith("DEVRST\u0017")) {
                 printdbg("Device Reset")
                 //readModeLength = -1
@@ -322,16 +326,25 @@ class TevdDiskDrive(private val vm: VM, private val driveNum: Int, private val t
 
                 val bootFile = TevdFileDescriptor(DOM, "!BOOTSEC")
 
+                println("bootFile = $bootFile, ID: ${bootFile.entryID}, exists = ${bootFile.exists()}")
+
                 if (!bootFile.exists()) {
+                    println("bootfile not exists!")
                     statusCode.set(TestDiskDrive.STATE_CODE_NO_SUCH_FILE_EXISTS)
                     return
                 }
                 try {
                     val retMsg = bootFile.getHeadBytes(BLOCK_SIZE)
+
+                    println("retMsg = ${retMsg.toString(VM.CHARSET)}")
+
                     recipient?.writeout(retMsg)
                     statusCode.set(TestDiskDrive.STATE_CODE_STANDBY)
                 }
                 catch (e: IOException) {
+                    println("exception:")
+                    e.printStackTrace()
+
                     statusCode.set(TestDiskDrive.STATE_CODE_SYSTEM_IO_ERROR)
                     return
                 }
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdFileDescriptor.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdFileDescriptor.kt
index 33a1681..6f0dcb1 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/TevdFileDescriptor.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/TevdFileDescriptor.kt
@@ -9,18 +9,23 @@ import java.io.IOException
  */
 class TevdFileDescriptor(val DOM: VirtualDisk, _pathstr: String) {
 
-    val path = _pathstr.replace('/', '\\')
+    val path = _pathstr.replace('\\', '/')
     val vdPath = VDUtil.VDPath(path, VM.CHARSET)
 
     val entryID: EntryID?
         get() = VDUtil.getFile(DOM, vdPath)?.entryID
 
-    val canonicalPath: String
-        get() = path
-    val name: String
-        get() = path.substring(path.lastIndexOf('\\') + 1)
-    val nameBytes: ByteArray
-        get() = name.toByteArray(VM.CHARSET)
+    val canonicalPath = path.replace('/', '\\')
+
+    /*init {
+        println("$path's vdPath:")
+        vdPath.hierarchy.forEach {
+            println("  ${it.toCanonicalString(VM.CHARSET)} [${it.joinToString(" ") { it.toString(16).padStart(2, '0') } }]")
+        }
+    }*/
+
+    val nameBytes = if (vdPath.hierarchy.isEmpty()) ByteArray(DiskEntry.NAME_LENGTH) else vdPath.last()
+    val name = nameBytes.toCanonicalString(VM.CHARSET)
 
 
     val isFile: Boolean
@@ -45,16 +50,28 @@ class TevdFileDescriptor(val DOM: VirtualDisk, _pathstr: String) {
      * @return actual bytes read, the size may be less than `length` if the actual file size is smaller
      */
     fun getHeadBytes64(length: Long): ByteArray64 {
-        if (fileContent == null) throw IOException("No such file or not a file")
-        return fileContent!!.getContent().sliceArray64(0L until length)
+        if (isDirectory) throw RuntimeException("Not a file")
+        if (!exists()) throw IOException("File not found")
+
+        if (fileContent == null) fileContent = VDUtil.getAsNormalFile(DOM, vdPath)
+
+        return fileContent!!.getContent().let {
+            it.sliceArray64(0L until minOf(length, it.size))
+        }
     }
     /**
      * @param length how many bytes to read
      * @return actual bytes read, the size may be less than `length` if the actual file size is smaller
      */
     fun getHeadBytes(length: Int): ByteArray {
-        if (fileContent == null) throw IOException("No such file or not a file")
-        return fileContent!!.getContent().sliceArray(0 until length)
+        if (isDirectory) throw RuntimeException("Not a file")
+        if (!exists()) throw IOException("File not found")
+
+        if (fileContent == null) fileContent = VDUtil.getAsNormalFile(DOM, vdPath)
+
+        return fileContent!!.getContent().let {
+            it.sliceArray(0 until minOf(length.toLong(), it.size).toInt())
+        }
     }
 
     fun exists(): Boolean {
@@ -78,7 +95,7 @@ class TevdFileDescriptor(val DOM: VirtualDisk, _pathstr: String) {
             if (it == null) return null
 
             return VDUtil.getDirectoryEntries(DOM, it).map {
-                TevdFileDescriptor(DOM, path + '\\' + it.getFilenameString(VM.CHARSET))
+                TevdFileDescriptor(DOM, path + '/' + it.getFilenameString(VM.CHARSET))
             }.toTypedArray()
         }
     }