Create writemostly_test.sh

writemostly_test.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+set_writemostly(){ 
+    # $1 is sata1 or sas1 or sda etc
+    if [[ ${1::2} == "sd" ]]; then
+        # sda etc
+
+        # md0 DSM system partition
+        echo writemostly > /sys/block/md0/md/dev-"${1}"1/state
+        echo -n "md0 $1: " && cat /sys/block/md0/md/dev-"${1}"1/state  # debug
+
+        # md1 DSM swap partition
+        echo writemostly > /sys/block/md1/md/dev-"${1}"2/state
+        echo -n "md1 $1: " && cat /sys/block/md1/md/dev-"${1}"2/state  # debug
+    else
+        # sata1 or sas1 etc
+
+        # md0 DSM system partition
+        echo writemostly > /sys/block/md0/md/dev-"${1}"p1/state
+        echo -n "md0 $1: " && cat /sys/block/md0/md/dev-"${1}"p1/state  # debug
+
+        # md1 DSM swap partition
+        echo writemostly > /sys/block/md1/md/dev-"${1}"p2/state
+        echo -n "md1 $1: " && cat /sys/block/md1/md/dev-"${1}"p2/state  # debug
+    fi
+}
+
+# Get array of internal drives
+readarray -t internal_drives < <(synodisk --enum -t internal | grep 'Disk path')
+
+# Get list of HDDs and qty of SSDs
+internal_ssd_qty="0"
+for idrive in "${internal_drives[@]}"; do
+    internal_drive="$(echo "$idrive" | awk '{printf $4}')"
+
+    if synodisk --isssd "$internal_drive" >/dev/null; then
+        # exit code 0 = is not SSD
+        # exit code 1 = is SSD
+
+        # Add internal HDDs to array
+        internal_hdds+=("$internal_drive")
+    else
+        # Count number of 2.5 inch SSDs
+        internal_ssd_qty=$((internal_ssd_qty +1))
+    fi
+done
+
+
+echo "$internal_ssd_qty internal SSD"          # debug
+echo -e "${#internal_hdds[@]} internal HDD\n"  # debug
+
+
+# Set HDDs to writemostly if there's also internal SSDs
+if [[ $internal_ssd_qty -gt "0" ]] && [[ ${#internal_hdds[@]} -gt "0" ]]; then
+    # There are internal SSDs and HDDs
+    for idrive in "${internal_hdds[@]}"; do
+        #echo "$(basename -- "$idrive")"  # debug
+        set_writemostly "$(basename -- "$idrive")"
+        echo ""  # debug
+    done
+fi
+
+exit
+