Disk IO stats by Userparameter

User parameters in Agent Configuration file .

UserParameter=custom.vfs.dev.read.ops[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$4}'
UserParameter=custom.vfs.dev.read.ms[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$7}'
UserParameter=custom.vfs.dev.write.ops[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$8}'
UserParameter=custom.vfs.dev.write.ms[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$11}'
UserParameter=custom.vfs.dev.io.active[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$12}'
UserParameter=custom.vfs.dev.io.ms[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$13}'
UserParameter=custom.vfs.dev.read.sectors[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$6}'
UserParameter=custom.vfs.dev.write.sectors[*],cat /proc/diskstats | grep $1 | head -1 | awk '{print $$10}'

save it in /etc/zabbix/zabbix_agentd.conf

Then restart zabbix-agent by below command

#Systemctl restart zabbix-agent 

Import below template

https://drive.google.com/open?id=0BxB8j19aCMZ8WmM5d3RIM0tOYVE

Based in /proc/diskstats

What:  /proc/diskstats

Description:
  The /proc/diskstats file displays the I/O statistics
  of block devices. Each line contains the following 14
  fields:
   1 - major number
   2 - minor mumber
   3 - device name
   4 - reads completed successfully
   5 - reads merged
   6 - sectors read
   7 - time spent reading (ms)
   8 - writes completed
   9 - writes merged
  10 - sectors written
  11 - time spent writing (ms)
  12 - I/Os currently in progress
  13 - time spent doing I/Os (ms)
  14 - weighted time spent doing I/Os (ms)
  For more details refer to Documentation/iostats.txt