*********BELOW METRICS ARE RELATED TO DISK*********
1.  iostat.disk.read_requests       dev=<disk>
2.  iostat.disk.read_merged         dev=<disk>
3.  iostat.disk.read_sectors        dev=<disk>
4.  iostat.disk.msec_read           dev=<disk>
5.  iostat.disk.write_requests      dev=<disk>
6.  iostat.disk.write_merged        dev=<disk>
7.  iostat.disk.write_sectors       dev=<disk>
8.  iostat.disk.msec_write          dev=<disk>
9.  iostat.disk.ios_in_progress     dev=<disk>
10. iostat.disk.msec_total          dev=<disk>
11. iostat.disk.msec_weighted_total dev=<disk>
12. iostat.disk.svctm               dev=<disk>
13. iostat.disk.r_await             dev=<disk>
14. iostat.disk.w_await             dev=<disk>
15. iostat.disk.await               dev=<disk>
16. iostat.disk.util                dev=<disk>
17. iostat.disk.avgrq_sz            dev=<disk>

*********BELOW METRICS ARE RELATED TO PARTITION*********
18. iostat.part.read_requests       dev=<partition_no>
19. iostat.part.read_merged         dev=<partition_no>
20. iostat.part.read_sectors        dev=<partition_no>
21. iostat.part.msec_read           dev=<partition_no>
22. iostat.part.write_requests      dev=<partition_no>
23. iostat.part.write_merged        dev=<partition_no>
24. iostat.part.write_sectors       dev=<partition_no>
25. iostat.part.msec_write          dev=<partition_no>
26. iostat.part.ios_in_progress     dev=<partition_no>
27. iostat.part.msec_total          dev=<partition_no>
28. iostat.part.msec_weighted_total dev=<partition_no>