How to find disk I/O performance in Linux

Command

10 = 10 seconds interval

#iostat 10

Result
avg-cpu: %user %nice %system %iowait %steal %idle

0.55 0.00 0.03 0.21 0.00 99.22

Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 15.27 0.16 162.70 1787038 1770815888