[linux-lvm] LV no of reads and writes

[sachin]

hi
I have  tried one lvm command  I want some clarification  
lvdisplay  -v  /dev/vg/lv1
It dispalys the information along with reads and writes
What that actually means
1. Is it  no read operations ,I think is not
2 Is it no of blocks read  
3 Is it data read in terms of sector

Is it possible to get the no of io operations on the logical volume 
I am using LVM1
Thanks
Sachin.