disk_load: initialize array values upon first start

plugins/dynamix/nchan/disk_load

@@ -3,6 +3,9 @@ ini=/var/local/emhttp/diskload.ini
 tmp=/var/local/emhttp/diskload.tmp
 declare -a reads writes
 
+# t = poll interval in seconds
+t=2
+
 # initialize array values upon first start
 stats=($(awk '/(sd[a-z]*|nvme[0-9]*n1|vd[a-z]*) /{print $3,$6,$10,$4,$8}' /proc/diskstats))
 c=0; s=${#stats[@]}
@@ -11,9 +14,8 @@ for ((i=0;i<s;i+=5)); do
   writes[c]=${stats[i+2]}
   ((c++))
 done
+sleep $t
 
-# t = poll interval in seconds
-t=2
 while :; do
   stats=($(awk '/(sd[a-z]*|nvme[0-9]*n1|vd[a-z]*) /{print $3,$6,$10,$4,$8}' /proc/diskstats))
   c=0; s=${#stats[@]}