diff --git a/assets/disk0/tvdos/bin/command.js b/assets/disk0/tvdos/bin/command.js
index de1f4a3..978f4ab 100644
--- a/assets/disk0/tvdos/bin/command.js
+++ b/assets/disk0/tvdos/bin/command.js
@@ -810,7 +810,7 @@ shell.execute = function(line) {
 }
 shell.pipes = {} // syntax: _G.shell.pipes[name] = contents; all pipes are named pipes just like in Windows
 shell.currentlyActivePipes = [] // Queue of pipe's names. Use shell.removePipe() to dequeue and shell.pushPipe() to enqueue.
-shell._rndstr = '0123456789+qwfpgjluyarstdhneiozxcvbkm/QWFPGJLUYARSTDHNEIOZXCVBKM'
+shell._rndstr = '0123456789+qwfpgjluyarstdhneiozxcvbkm&QWFPGJLUYARSTDHNEIOZXCVBKM'
 shell.generateAnonPipeName = function() {
     let name = ''
     while (true) {
diff --git a/assets/disk0/tvdos/bin/lfs.js b/assets/disk0/tvdos/bin/lfs.js
index db6f862..92ee7a3 100644
--- a/assets/disk0/tvdos/bin/lfs.js
+++ b/assets/disk0/tvdos/bin/lfs.js
@@ -1,10 +1,38 @@
+/*
+TVDOS Linear File Strip.
+
+Format:
+
+- Header
+- FileBlock... (repeatedly appended for every file collected)
+
+# Header
+
+Bytes   "TVDOSLFS\x01" - header
+Uint16  Encoding
+    00 00 : Pure ASCII/CP437
+    01 00..0F : ISO 8859-1..16
+    10 00 : UTF-8
+    10 01 : UTF-16BE
+    10 02 : UTF-16LE
+Byte[5] Padding
+
+# FileBlocks
+Uint8    File type (only 1 is used)
+Uint16   Length of the Path
+Bytes[*] Fully Qualified Path string
+Uint32   Length of the binary
+Bytes[*] Binary representation of the file, no extra compression (to reduce the size of the archive, gzip the entire LFS
+instead of compressing individual files)
+ */
+
 function printUsage() {
     println(`Collects files under a directory into a single archive.
 Usage: lfs [-c/-x/-t] dest.lfs path\\to\\source
 To collect a directory into myarchive.lfs:
        lfs -c myarchive.lfs path\\to\\directory
 To extract an archive to path\\to\\my\\files:
-       lfs -x myarchive.lfs \\path\\to\\my\\files
+       lfs -x myarchive.lfs path\\to\\my\\files
 To list the collected files:
        lfs -t myarchive.lfs`)
 }
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/ClusteredDiskDrive.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/ClusteredDiskDrive.kt
new file mode 100644
index 0000000..a7ba00f
--- /dev/null
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/ClusteredDiskDrive.kt
@@ -0,0 +1,34 @@
+package net.torvald.tsvm.peripheral
+
+import net.torvald.tsvm.VM
+import java.util.UUID
+
+/**
+ * `theArchivePath` must always be specified (where to load/save)
+ *
+ * To denote formatted (=already created) disk:
+ * - specify diskUUIDstr
+ * - set sectorsForNewDisk as -1
+ * - set deviceOrigin and deviceTier as 0
+ *
+ * To denote unformatted (=not yet created) disk:
+ * - set diskUUIDstr as ""
+ * - specify sectorsForNewDisk
+ * - specify deviceOrigin and deviceTier
+ *
+ * Created by minjaesong on 2023-05-15.
+ */
+class ClusteredDiskDrive(
+    private val vm: VM,
+    private val driveNum: Int,
+    private val theArchivePath: String,
+    private val diskUUIDstr: String,
+    private val sectorsForNewDisk: Int,
+    private val deviceOrigin: Int,
+    private val deviceTier: Int
+) {
+
+    private var uuid: UUID? = if (diskUUIDstr.isEmpty()) null else UUID.fromString(diskUUIDstr)
+
+
+}
\ No newline at end of file