diff --git a/syno_seq_io.sh b/syno_seq_io.sh
index 08d940a..ba783cd 100644
--- a/syno_seq_io.sh
+++ b/syno_seq_io.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# shellcheck disable=SC2076,SC2207
 #------------------------------------------------------------------------------
 # Github: https://github.com/007revad/Synology_enable_sequential_IO
 # Script verified at https://www.shellcheck.net/
@@ -16,103 +17,248 @@
 # If no parameter the script defaults to 0
 #------------------------------------------------------------------------------
 
-scriptver="v1.0.1"
+# v2.0.3
+# Added --volumes option to make it possible to schedule script to run at boot-up.
+#  - You can specify multiple comma separated volumes.
+# Added --kb option to replace setting kb via first parameter.
+# Bug fix for "Not persistent across reboots" issue #2
+# Bug fix for when no caches are found.
+# Bug fix for when multiple caches are found.
+
+
+scriptver="v2.0.3"
 script=Synology_enable_sequential_IO
 repo="007revad/Synology_enable_sequential_IO"
 #scriptname=syno_seq_io
 
-if [[ $1 =~ ^[0-9]+$ ]]; then
-    kb="$1"
+# Check script is running as root
+if [[ $( whoami ) != "root" ]]; then
+    echo -e "$script $scriptver - by 007revad"
+    echo -e "ERROR This script must be run as sudo or root!"
+    exit 1
+fi
+
+version(){ 
+    echo -e "$script $scriptver - by 007revad"
+    echo -e "See https://github.com/$repo \n"
+}
+
+# Save options used
+args=("$@")
+
+usage(){ 
+    cat <<EOF
+$script $scriptver - by 007revad
+
+Usage: $(basename "$0") [options]
+
+Options:
+      --volumes=VOLUME  Volume or volumes to enable sequential I/O for
+                          Examples:
+                          --volumes=volume_1
+                          --volumes=volume_1,volume_3,volume_4
+      --kb=KB           Set a specific sequential I/O kb value
+                          Use to disable sequential I/O
+                          --kb=1024
+  -e, --email           Disable colored text in output scheduler emails
+  -h, --help            Show this help message
+  -v, --version         Show the script version
+
+EOF
+    exit 0
+}
+
+# Check for flags with getopt
+if options="$(getopt -o abcdefghijklmnopqrstuvwxyz0123456789 -l \
+    volumes:,kb:,email,help,version -- "${args[@]}")"; then
+    eval set -- "$options"
+    while true; do
+        case "${1,,}" in
+            -h|--help)          # Show usage options
+                usage
+                ;;
+            -v|--version)       # Show script version
+                scriptversion
+                exit
+                ;;
+            --volumes)          # Volumes to process
+                if [[ -n "$2" ]]; then
+                    IFS=',' read -r -a cachevols <<< "$2"
+                    scheduled="yes"
+                    shift
+                fi
+                ;;
+            --kb)               # kb value to set
+                if [[ $2 =~ ^[0-9]+$ ]]; then
+                    kb="$2"
+                    shift
+                fi
+                ;;
+            -e|--email)         # Disable colour text in task scheduler emails
+                color=no
+                ;;
+            --)
+                shift
+                break
+                ;;
+            *)                  # Show usage options
+                echo -e "Invalid option '$1'\n"
+                usage "$1"
+                ;;
+        esac
+        shift
+    done
 else
+    echo
+    usage
+fi
+
+if [[ -z "$kb" ]]; then
     kb="0"
 fi
 
-echo -e "$script $scriptver - by 007revad\n"
-echo -e "See https://github.com/$repo \n"
+# Show script version
+version
 
-# Check script is running as root
-if [[ $( whoami ) != "root" ]]; then
-    echo -e "ERROR This script must be run as sudo or root!"
-    exit 1
+# Show options used
+if [[ ${#args[@]} -gt "0" ]]; then
+    echo "Using options: ${args[*]}"
+fi
+
+# Shell Colors
+if [[ $color != "no" ]]; then
+    #Black='\e[0;30m'   # ${Black}
+    Red='\e[0;31m'      # ${Red}
+    Green='\e[0;32m'    # ${Green}
+    #Yellow='\e[0;33m'  # ${Yellow}
+    #Blue='\e[0;34m'    # ${Blue}
+    #Purple='\e[0;35m'  # ${Purple}
+    Cyan='\e[0;36m'     # ${Cyan}
+    #White='\e[0;37m'   # ${White}
+    #Error='\e[41m'      # ${Error}
+    Off='\e[0m'         # ${Off}
+else
+    echo ""  # For task scheduler email readability
 fi
 
+
 # Get list of volumes with caches
-caches=("$(sysctl dev | grep skip_seq_thresh_kb)")
+cachelist=("$(sysctl dev | grep skip_seq_thresh_kb)")
+IFS=$'\n' caches=($(sort <<<"${cachelist[*]}")); unset IFS
+
+
+if [[ ${#caches[@]} -lt "1" ]]; then
+    echo "No caches found!" && exit 1
+fi
+
 
 # Get caches' current setting 
 for c in "${caches[@]}"; do
     volume="$(echo "$c" | cut -d"+" -f2 | cut -d"." -f1)"
     kbs="$(echo "$c" | cut -d"=" -f2 | awk '{print $1}')"
     volumes+=("${volume}|$kbs")
+
+    sysctl_dev="$(echo "$c" | cut -d"." -f2 | awk '{print $1}')"
+    sysctl_devs+=("$sysctl_dev")
 done
 
-# Select cache volume to edit
-if [[ ${#volumes[@]} -gt 0 ]]; then
-    echo "Setting a cache's skip_seq_thresh_kb to 0 enables sequential I/O"
-    echo "Choose a volume with a cache to edit: "
-    echo "---------------------"
-    echo "Cache Volume  Setting"
-    echo "---------------------"
-    for ((i=1; i<=${#volumes[@]}; i++)); do
-        info="${volumes[i-1]}"
-        before_pipe="${info%%|*}"
-        after_pipe="${info#*|}"
-        printf "%-3s %-9s %s\n" "$i)" "$before_pipe" "$after_pipe"
-    done
-    echo "---------------------"
+
+# Show cache volumes and current setting
+if [[ $scheduled != "yes" ]]; then
+    if [[ ${#volumes[@]} -gt 0 ]]; then
+        echo -e "Setting a cache's skip_seq_thresh_kb to 0 enables sequential I/O\n"
+        #echo "Volumes with a cache: "
+        echo "----------------------"
+        echo "   Cache_Vol  Setting"
+        echo "----------------------"
+        for ((i=1; i<=${#volumes[@]}; i++)); do
+            info="${volumes[i-1]}"
+            before_pipe="${info%%|*}"
+            after_pipe="${info#*|}"
+            printf "%-3s %-9s %s\n" "$i)" "$before_pipe" "$after_pipe"
+        done
+        echo "----------------------"
+    else
+        echo "No caches found!" && exit 1
+    fi
 else
-    echo "No caches found!" && exit 1
+    echo ""
 fi
 
-# Parse selected element of array
-read -rp "Select cache volume to edit: " choice
-#IFS="|" read -r cachevol setting <<< "${volumes[choice-1]}"
 
-# Check valid choice entered
-if [[ $choice =~ ^[0-9]+$ ]] &&  [[ $choice != "0" ]] &&\
-    [[ ! $choice -gt "${#volumes[@]}" ]]; then
-    IFS="|" read -r cachevol setting <<< "${volumes[choice-1]}"
-else
-    echo "Invalid choice! $choice"
-    exit
-fi
+# Select volume's cache to edit if not scheduled
+if [[ $scheduled != "yes" ]]; then
+
+    # Parse selected element of array
+    read -rp "Select cache volume to edit: " choice
+    #IFS="|" read -r cachevol setting <<< "${volumes[choice-1]}"
 
-# Show selected volume and it's current setting
-if [[ ! $setting -eq "$kb" ]]; then
+    # Check valid choice entered
+    if [[ $choice =~ ^[0-9]+$ ]] &&  [[ $choice != "0" ]] &&\
+        [[ ! $choice -gt "${#volumes[@]}" ]]; then
+        IFS="|" read -r cachevol setting <<< "${volumes[choice-1]}"
+    else
+        echo "Invalid choice! $choice"
+        exit
+    fi
     echo -e "\nYou selected $cachevol to set to $kb\n"
-else
-    echo -e "\n$cachevol is already set to $kb\n"
-    exit
+
+    cachevols=("$cachevol")
 fi
 
-# Get cache's key name
-cacheval="$(sysctl dev | grep skip_seq_thresh_kb | grep "$cachevol")"
-key="$(echo "$cacheval" | cut -d"=" -f1 | cut -d" " -f1)"
 
-# Set new cache kb value
-synosetkeyvalue /etc/sysctl.conf "$key" "$kb"
+for v in "${sysctl_devs[@]}"; do
+    for c in "${cachevols[@]}"; do
+        if [[ $v =~ "$c" ]]; then
+            cachevol="$c"
 
-# Check we set key value
-check="$(synogetkeyvalue /etc/sysctl.conf "$key")"
-if [[ "$check" == "$kb" ]]; then
-    echo -e "Sequential I/O for $cachevol cache is enabled.\n"
-elif [[ -z "$check" ]]; then
-    echo -e "Sequential I/O for $cachevol cache is set to default.\n"
-else
-    echo -e "Sequential I/O for $cachevol cache is set to $check.\n"
-fi
+            # Get cache's key name
+            cacheval="$(sysctl dev | grep skip_seq_thresh_kb | grep "$cachevol")"
+            key="$(echo "$cacheval" | cut -d"=" -f1 | cut -d" " -f1)"
 
-echo -e "The Synology needs to restart.${Off}"
-echo -e "Type yes to reboot now."
-echo -e "Type anything else to quit (if you will restart it yourself)."
-read -r -t 10 answer
-if [[ ${answer,,} != "yes" ]]; then exit; fi
+            # Set new cache kb value
+            val="$(synosetkeyvalue /etc/sysctl.conf "$key")"
+            if [[ $val != "$kb" ]]; then
+                synosetkeyvalue /etc/sysctl.conf "$key" "$kb"
+            fi
 
-if [[ -x /usr/syno/sbin/synopoweroff ]]; then
-    /usr/syno/sbin/synopoweroff -r || reboot
-else
-    reboot
+            if echo "$v" | grep "$cachevol" >/dev/null; then
+                echo "$kb" > "/proc/sys/dev/${v}/skip_seq_thresh_kb"
+            fi
+
+            # Check we set key value
+            check="$(synogetkeyvalue /etc/sysctl.conf "$key")"
+            if [[ "$check" == "0" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Green}Enabled${Off} in /etc/sysctl.conf"
+            elif [[ "$check" == "1024" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Red}Disabled${Off} in /etc/sysctl.conf"
+            elif [[ -z "$check" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Red}not set${Off} in /etc/sysctl.conf"
+            else
+                echo -e "Sequential I/O for $cachevol cache is set to ${Cyan}$check${Off} in /etc/sysctl.conf"
+            fi
+
+            # Check we set proc/sys/dev
+            val="$(cat /proc/sys/dev/"${v}"/skip_seq_thresh_kb)"
+            if [[ "$val" == "0" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Green}Enabled${Off} in /proc/sys/dev\n"
+            elif [[ "$val" == "1024" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Red}Disabled${Off} in /proc/sys/dev\n"
+            elif [[ -z "$val" ]]; then
+                echo -e "Sequential I/O for $cachevol cache is ${Red}not set${Off} in /proc/sys/dev\n"
+            else
+                echo -e "Sequential I/O for $cachevol cache is set to ${Cyan}$val${Off} in /proc/sys/dev\n"
+            fi
+        fi
+    done
+done
+
+
+if [[ $scheduled != "yes" ]]; then
+    echo "You need to run this script after each reboot,"
+    echo -e "or schedule a triggered task to run it as root at boot.\n"
 fi
 
+
 exit