diff --git a/app/cli-acx/src/main/java/io/github/applecommander/acx/SystemType.java b/app/cli-acx/src/main/java/io/github/applecommander/acx/SystemType.java
index 4f15ea4..1bae329 100644
--- a/app/cli-acx/src/main/java/io/github/applecommander/acx/SystemType.java
+++ b/app/cli-acx/src/main/java/io/github/applecommander/acx/SystemType.java
@@ -98,8 +98,7 @@ public enum SystemType {
 
 	static void copyDosSystemTracks(FormattedDisk targetDisk, FormattedDisk source) {
 		DosFormatDisk target = (DosFormatDisk)targetDisk;
-		// FIXME messing with the VTOC should be handled elsewhere 
-		byte[] vtoc = source.readSector(DosFormatDisk.CATALOG_TRACK, DosFormatDisk.VTOC_SECTOR);
+		byte[] vtoc = target.readVtoc();
 		int sectorsPerTrack = vtoc[0x35];
 		// Note that this also patches T0 S0 for BOOT0
 		for (int t=0; t<3; t++) {
@@ -108,6 +107,7 @@ public enum SystemType {
 				target.setSectorUsed(t, s, vtoc);
 			}
 		}
+		target.writeVtoc(vtoc);
 	}
 	static void copyProdosSystemFiles(FormattedDisk target, FormattedDisk source) {
 		// We need to explicitly fix the boot block
diff --git a/lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/os/dos33/DosFormatDisk.java b/lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/os/dos33/DosFormatDisk.java
index 82f2dc0..aec2032 100644
--- a/lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/os/dos33/DosFormatDisk.java
+++ b/lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/os/dos33/DosFormatDisk.java
@@ -275,14 +275,14 @@ public class DosFormatDisk extends FormattedDisk {
 	/**
 	 * Return the VTOC (Volume Table Of Contents).
 	 */
-	protected byte[] readVtoc() {
+	public byte[] readVtoc() {
 		return readSector(CATALOG_TRACK, VTOC_SECTOR);
 	}
 	
 	/**
 	 * Save the VTOC (Volume Table Of Contents) to disk.
 	 */
-	protected void writeVtoc(byte[] vtoc) {
+	public void writeVtoc(byte[] vtoc) {
 		writeSector(CATALOG_TRACK, VTOC_SECTOR, vtoc);
 	}