diff --git a/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh b/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
index 3ab212bd..852e4136 100644
--- a/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
+++ b/IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh
@@ -24,6 +24,7 @@
 
 if [ -f $VTOY_PATH/autoinstall ]; then
     VTKS="inst.ks=file:$VTOY_PATH/autoinstall"
+    cp -a $VTOY_PATH/hook/rhel7/ventoy-autoexp.sh /lib/dracut/hooks/pre-mount/99-ventoy-autoexp.sh
 else
     for vtParam in $($CAT /proc/cmdline); do
         if echo $vtParam | $GREP -q 'ks=file:/'; then
@@ -90,23 +91,7 @@ if ls $VTOY_PATH | $GREP -q 'ventoy_dud[0-9]'; then
 fi
 echo "vtInstDD=$vtInstDD" >> $VTLOG
 
-if $GREP -q 'root=live' /proc/cmdline; then
-    $SED "s#printf\(.*\)\$CMDLINE#printf\1\$CMDLINE root=live:/dev/ventoy $VTKS $VTOVERLAY $vtInstDD#" -i /lib/dracut-lib.sh
-else
-    $SED "s#printf\(.*\)\$CMDLINE#printf\1\$CMDLINE inst.stage2=hd:/dev/ventoy $VTKS $VTOVERLAY $vtInstDD#" -i /lib/dracut-lib.sh
-fi
 
-ventoy_set_inotify_script  rhel7/ventoy-inotifyd-hook.sh
-
-#Fedora
-if $BUSYBOX_PATH/which dmsquash-live-root > /dev/null; then
-    vtPriority=99
-else
-    vtPriority=01
-fi
-
-$BUSYBOX_PATH/cp -a $VTOY_PATH/hook/rhel7/ventoy-inotifyd-start.sh /lib/dracut/hooks/pre-udev/${vtPriority}-ventoy-inotifyd-start.sh
-$BUSYBOX_PATH/cp -a $VTOY_PATH/hook/rhel7/ventoy-timeout.sh /lib/dracut/hooks/initqueue/timeout/${vtPriority}-ventoy-timeout.sh
 
 vtNeedRepo=
 if [ -f /etc/system-release ]; then
@@ -131,13 +116,53 @@ if $GREP -i -q Fedora /etc/os-release; then
     fi
 fi
 
-
 echo "vtNeedRepo=$vtNeedRepo" >> $VTLOG
 
 if [ "$vtNeedRepo" = "yes" ]; then
     $BUSYBOX_PATH/cp -a $VTOY_PATH/hook/rhel7/ventoy-repo.sh /lib/dracut/hooks/pre-pivot/99-ventoy-repo.sh
 fi
 
+
+#iso-scan (currently only for Fedora)
+if $GREP -q Fedora /etc/os-release; then
+    if ventoy_iso_scan_check; then
+        echo "iso_scan process ..." >> $VTLOG
+        
+        vtIsoPath=$(/ventoy/tool/vtoydump -p /ventoy/ventoy_os_param)
+        VTISO_SCAN="iso-scan/filename=$vtIsoPath"    
+        echo -n $vtIsoPath > /ventoy/vtoy_iso_scan
+
+        $SED "s#printf\(.*\)\$CMDLINE#printf\1\$CMDLINE $VTISO_SCAN $VTKS $VTOVERLAY $vtInstDD#" -i /lib/dracut-lib.sh    
+        if [ "$VTOY_LINUX_REMOUNT" = "01" -a "$vtNeedRepo" != "yes" ]; then
+            ventoy_rw_iso_scan
+        fi
+
+        exit 0
+    fi
+fi
+
+
+echo "common process ..." >> $VTLOG
+if $GREP -q 'root=live' /proc/cmdline; then
+    $SED "s#printf\(.*\)\$CMDLINE#printf\1\$CMDLINE root=live:/dev/ventoy $VTKS $VTOVERLAY $VTISO_SCAN $vtInstDD#" -i /lib/dracut-lib.sh
+else
+    $SED "s#printf\(.*\)\$CMDLINE#printf\1\$CMDLINE inst.stage2=hd:/dev/ventoy $VTKS $VTOVERLAY $VTISO_SCAN $vtInstDD#" -i /lib/dracut-lib.sh
+fi
+
+
+ventoy_set_inotify_script  rhel7/ventoy-inotifyd-hook.sh
+
+#Fedora
+if $BUSYBOX_PATH/which dmsquash-live-root > /dev/null; then
+    vtPriority=99
+else
+    vtPriority=01
+fi
+
+$BUSYBOX_PATH/cp -a $VTOY_PATH/hook/rhel7/ventoy-inotifyd-start.sh /lib/dracut/hooks/pre-udev/${vtPriority}-ventoy-inotifyd-start.sh
+$BUSYBOX_PATH/cp -a $VTOY_PATH/hook/rhel7/ventoy-timeout.sh /lib/dracut/hooks/initqueue/timeout/${vtPriority}-ventoy-timeout.sh
+
+
 if [ -e /sbin/dmsquash-live-root ]; then
     echo "patch /sbin/dmsquash-live-root ..." >> $VTLOG
     $SED "1 a $BUSYBOX_PATH/sh $VTOY_PATH/hook/rhel7/ventoy-make-link.sh" -i /sbin/dmsquash-live-root
@@ -154,10 +179,6 @@ if $GREP -i -q 'fedora.*coreos' /etc/os-release; then
     cp -a $VTOY_PATH/hook/rhel7/ventoy-make-link.sh /lib/dracut/hooks/pre-mount/99-ventoy-premount-mklink.sh
 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
diff --git a/IMG/cpio/ventoy/hook/rhel7/ventoy-repo.sh b/IMG/cpio/ventoy/hook/rhel7/ventoy-repo.sh
index af85bebd..002aa5e7 100644
--- a/IMG/cpio/ventoy/hook/rhel7/ventoy-repo.sh
+++ b/IMG/cpio/ventoy/hook/rhel7/ventoy-repo.sh
@@ -23,7 +23,18 @@ vtlog "##### $0 $* ..."
 
 VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
 
-repodev=$(ls $VTOY_PATH/dev_backup*)
-echo "inst.repo=hd:/dev/${repodev#*dev_backup_}" >> /sysroot/etc/cmdline
+if [ -f /ventoy/vtoy_iso_scan ]; then
+    repopath=$(cat /ventoy/vtoy_iso_scan)
+    repodev=$(vtoydump -f /ventoy/ventoy_os_param | awk -F'#' '{print $1}')
+    if echo $repodev | egrep -q "nvme|mmc|nbd"; then
+        vtpart1=${repodev}p1
+    else
+        vtpart1=${repodev}1
+    fi
+    echo "inst.repo=hd:${vtpart1}:${repopath}" >> /sysroot/etc/cmdline
+else
+    repodev=$(ls $VTOY_PATH/dev_backup*)
+    echo "inst.repo=hd:/dev/${repodev#*dev_backup_}" >> /sysroot/etc/cmdline
+fi
 
 PATH=$VTPATH_OLD
diff --git a/IMG/cpio/ventoy/hook/ventoy-os-lib.sh b/IMG/cpio/ventoy/hook/ventoy-os-lib.sh
index dbd015f8..693a96b7 100644
--- a/IMG/cpio/ventoy/hook/ventoy-os-lib.sh
+++ b/IMG/cpio/ventoy/hook/ventoy-os-lib.sh
@@ -121,3 +121,48 @@ ventoy_check_mount() {
         $BUSYBOX_PATH/mount $1 $2
     fi
 }
+
+ventoy_has_exfat_ko() {
+    vtExfat=''
+    vtKerVer=$($BUSYBOX_PATH/uname -r)
+    if [ -d /lib/modules/$vtKerVer/kernel/fs/exfat ]; then
+        vtExfat=$(ls /lib/modules/$vtKerVer/kernel/fs/exfat/)
+    fi
+    [ -n "$vtExfat" ]
+}
+
+ventoy_is_exfat_part() {
+    $VTOY_PATH/tool/vtoydump -s /ventoy/ventoy_os_param | $GREP -q exfat
+}
+
+ventoy_iso_scan_path() {
+    if [ -f /sbin/iso-scan ]; then
+        echo -n '/sbin/iso-scan'
+    elif [ -f /bin/iso-scan ]; then
+        echo -n '/bin/iso-scan'
+    else
+        echo -n ''
+    fi
+}
+
+ventoy_has_iso_scan() {
+    vtScanPath=$(ventoy_iso_scan_path)
+    [ -n "$vtScanPath" ]
+}
+
+ventoy_rw_iso_scan() {
+    vtScanPath=$(ventoy_iso_scan_path)
+    if [ -n "$vtScanPath" ]; then
+        if $GREP -q 'mount.* ro .*isoscan' $vtScanPath; then
+            $SED -i 's/\(mount.*-o.*\) ro /\1 rw /' $vtScanPath
+        fi
+    fi
+}
+
+ventoy_iso_scan_check() {
+    if ventoy_is_exfat_part; then
+        if ventoy_has_exfat_ko; then
+            ventoy_has_iso_scan
+        fi
+    fi
+}
\ No newline at end of file