diff --git a/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh b/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
index 76016874..d1cbdac1 100644
--- a/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
+++ b/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
@@ -150,3 +150,19 @@ fi
 if [ -f $VTOY_PATH/autoinstall ]; then
     cp -a $VTOY_PATH/hook/rhel7/ventoy-autoexp.sh /lib/dracut/hooks/pre-mount/99-ventoy-autoexp.sh
 fi
+
+
+#special distro magic
+$BUSYBOX_PATH/mkdir -p $VTOY_PATH/distmagic
+if $GREP -q SCRE /proc/cmdline; then
+    echo 1 > $VTOY_PATH/distmagic/SCRE
+fi
+
+if $GREP -qw 'SA[.]1' /proc/cmdline; then
+if $GREP -qw 'SA[.]2' /proc/cmdline; then
+if $GREP -qw 'rw'     /proc/cmdline; then
+    echo 1 > $VTOY_PATH/distmagic/DELL_PER
+fi
+fi
+fi
+
diff --git a/IMG/cpio/ventoy/hook/rhel7/ventoy-inotifyd-hook.sh b/IMG/cpio/ventoy/hook/rhel7/ventoy-inotifyd-hook.sh
index 609dc4ca..0ab59475 100644
--- a/IMG/cpio/ventoy/hook/rhel7/ventoy-inotifyd-hook.sh
+++ b/IMG/cpio/ventoy/hook/rhel7/ventoy-inotifyd-hook.sh
@@ -50,18 +50,9 @@ if is_inotify_ventoy_part $3; then
         vtScript=$($GREP -m1 'RUN.=' $vtGenRulFile | $AWK -F'RUN.=' '{print $2}' | $SED 's/"\(.*\)".*/\1/')
         vtlog "vtScript=$vtScript"
         
-        DELL_PER=''
-        if [ -f /etc/services ]; then
-            if grep -qiw DTK /etc/services; then
-                if grep -qiw Dell /etc/services; then
-                    DELL_PER='YES'
-                fi
-            fi
-        fi
-        
-        if $GREP -q SCRE /proc/cmdline; then
+        if [ -f $VTOY_PATH/distmagic/SCRE ]; then
             /sbin/dmsquash-live-root /dev/ventoy
-        elif [ "$DELL_PER" = "YES" ]; then
+        elif [ -f $VTOY_PATH/distmagic/DELL_PER ]; then
             sed 's/liverw=[^ ]*/liverw=ro/g' -i /sbin/dmsquash-live-root
             sed 's/writable_fsimg=[^ ]*/writable_fsimg=""/g' -i /sbin/dmsquash-live-root
             /sbin/dmsquash-live-root /dev/ventoy
diff --git a/IMG/cpio/ventoy/hook/rhel7/ventoy-make-link.sh b/IMG/cpio/ventoy/hook/rhel7/ventoy-make-link.sh
index a6923361..100815a8 100644
--- a/IMG/cpio/ventoy/hook/rhel7/ventoy-make-link.sh
+++ b/IMG/cpio/ventoy/hook/rhel7/ventoy-make-link.sh
@@ -26,7 +26,9 @@ fi
 blkdev_num=$($VTOY_PATH/tool/dmsetup ls | grep ventoy | sed 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1:\2/')  
 vtDM=$(ventoy_find_dm_id ${blkdev_num})
 
-if ! [ -e /dev/mapper/ventoy ]; then
+if [ -e /dev/mapper/ventoy ]; then
+    vtlog "/dev/mapper/ventoy already exist"
+else
     vtlog "link /dev/$vtDM to /dev/mapper/ventoy"
     ln -s /dev/$vtDM /dev/mapper/ventoy
 fi
@@ -35,7 +37,13 @@ VTLABEL=$($BUSYBOX_PATH/blkid /dev/$vtDM | $SED 's/.*LABEL="\([^"]*\)".*/\1/')
 vtlog "VTLABEL=$VTLABEL"
 
 if [ -n "$VTLABEL" ]; then
-    if ! [ -e "/dev/disk/by-label/$VTLABEL" ]; then
+    if ! [ -d /dev/disk/by-label ]; then
+        mkdir -p /dev/disk/by-label
+    fi
+
+    if [ -e "/dev/disk/by-label/$VTLABEL" ]; then
+        vtlog "/dev/disk/by-label/$VTLABEL already exist"
+    else
         vtlog "link /dev/$vtDM to /dev/disk/by-label/$VTLABEL"
         ln -s /dev/$vtDM "/dev/disk/by-label/$VTLABEL"
     fi
diff --git a/IMG/cpio/ventoy/hook/ventoy-hook-lib.sh b/IMG/cpio/ventoy/hook/ventoy-hook-lib.sh
index f6d9cb0f..b367895b 100644
--- a/IMG/cpio/ventoy/hook/ventoy-hook-lib.sh
+++ b/IMG/cpio/ventoy/hook/ventoy-hook-lib.sh
@@ -892,3 +892,17 @@ ventoy_check_umount() {
         fi
     done
 }
+
+ventoy_wait_dir() {
+    vtdir=$1
+    vtsec=0
+    
+    while [ $vtsec -lt $2 ]; do
+        if [ -d "$vtdir" ]; then
+            break
+        else
+            $SLEEP 1
+            vtsec=$(expr $vtsec + 1)
+        fi
+    done
+}
diff --git a/INSTALL/ventoy/vtoyjump32.exe b/INSTALL/ventoy/vtoyjump32.exe
index d6af4ac7..15f3fc17 100644
Binary files a/INSTALL/ventoy/vtoyjump32.exe and b/INSTALL/ventoy/vtoyjump32.exe differ
diff --git a/INSTALL/ventoy/vtoyjump64.exe b/INSTALL/ventoy/vtoyjump64.exe
index 54421200..d1e63c6f 100644
Binary files a/INSTALL/ventoy/vtoyjump64.exe and b/INSTALL/ventoy/vtoyjump64.exe differ
diff --git a/vtoyjump/vtoyjump/vtoyjump.c b/vtoyjump/vtoyjump/vtoyjump.c
index e72754dc..178e4354 100644
--- a/vtoyjump/vtoyjump/vtoyjump.c
+++ b/vtoyjump/vtoyjump/vtoyjump.c
@@ -1073,24 +1073,24 @@ End:
     return rc;
 }
 
-static int VentoyRunImdisk(const char *IsoPath, const char *imdiskexe, const char *ExOpt)
+static int VentoyRunImdisk(const char *IsoPath, const char *imdiskexe, const char *opt)
 {
     CHAR Letter;
     CHAR Cmdline[512];
     WCHAR CmdlineW[512];
     PROCESS_INFORMATION Pi;
 
-    Log("VentoyRunImdisk <%s> <%s>", IsoPath, imdiskexe);
+    Log("VentoyRunImdisk <%s> <%s> <%s>", IsoPath, imdiskexe, opt);
 
     Letter = GetIMDiskMountLogicalDrive();
 
-    if (ExOpt)
+    if (opt)
     {
-        sprintf_s(Cmdline, sizeof(Cmdline), "%s -a -o ro,%s -f \"%s\" -m %C:", imdiskexe, ExOpt, IsoPath, Letter);
+        sprintf_s(Cmdline, sizeof(Cmdline), "%s -a -o %s -f \"%s\" -m %C:", imdiskexe, opt, IsoPath, Letter);
     }
     else
     {
-        sprintf_s(Cmdline, sizeof(Cmdline), "%s -a -o ro -f \"%s\" -m %C:", imdiskexe, IsoPath, Letter);
+        sprintf_s(Cmdline, sizeof(Cmdline), "%s -a -f \"%s\" -m %C:", imdiskexe, IsoPath, Letter);
     }
     
     Log("mount iso to %C: use imdisk cmd <%s>", Letter, Cmdline);
@@ -1135,7 +1135,7 @@ int VentoyMountISOByImdisk(const char *IsoPath, DWORD PhyDrive)
 
     if (0 == VentoyCopyImdisk(PhyDrive, ImPath))
     {
-        VentoyRunImdisk(IsoPath, ImPath, NULL);
+        VentoyRunImdisk(IsoPath, ImPath, "ro");
         rc = 0;
     }