diff --git a/common/recipes-phosphor/flash/openpower-software-manager.bb b/common/recipes-phosphor/flash/openpower-software-manager.bb
index bdd8934..ebb23a1 100644
--- a/common/recipes-phosphor/flash/openpower-software-manager.bb
+++ b/common/recipes-phosphor/flash/openpower-software-manager.bb
@@ -51,4 +51,5 @@
         obmc-flash-bios-ubiremount.service \
         obmc-flash-bios-updatesymlinks.service \
         obmc-flash-bios-ubiclear@.service \
+        obmc-flash-bios-cleanup.service \
         "
diff --git a/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios b/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
index 948c6ec..6e4aa78 100644
--- a/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
+++ b/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
@@ -270,6 +270,27 @@
   fi
 }
 
+ubi_cleanup() {
+    # When ubi_cleanup is run, it expects one or no active version.
+    activeVersion=$(busctl --list --no-pager tree \
+            org.open_power.Software.Host.Updater | \
+            grep /xyz/openbmc_project/software/ | tail -c 9)
+
+    if [[ -z "$activeVersion" ]]; then
+        vols=$(ubinfo -a | grep -e "pnor-ro-" -e "pnor-rw-" | cut -c 14-)
+        vols=(${vols})
+    else
+        vols=$(ubinfo -a | grep -e "pnor-ro-" -e "pnor-rw-" | \
+                grep -v "$activeVersion" | cut -c 14-)
+        vols=(${vols})
+    fi
+
+    for (( index=0; index<${#vols[@]}; index++ )); do
+         name=${vols[index]}
+         umount_ubi
+    done
+}
+
 case "$1" in
   ubiattach)
     attach_ubi
@@ -297,6 +318,9 @@
     name="$2"
     clear_ubi
     ;;
+  ubicleanup)
+    ubi_cleanup
+    ;;
   *)
     echo "Invalid argument"
     exit 1
diff --git a/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-cleanup.service b/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-cleanup.service
new file mode 100644
index 0000000..07642a0
--- /dev/null
+++ b/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-cleanup.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Clean up UBI volumes unattached to a Host version
+
+[Service]
+Type=oneshot
+RemainAfterExit=no
+ExecStart=/usr/bin/env obmc-flash-bios ubicleanup
+SyslogIdentifier=obmc-flash-bios