[root@xxx ~]# iostat
Linux my.kernel.version (my.hostname) 	12/07/10
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
0.35    0.00    0.19    0.61    0.01   98.84
Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
xvda             11.04       174.56        96.57 1575022426  871286088
xvdb              0.92        14.90        10.14  134403952   91524480
xvdc              0.91        12.16        10.53  109676480   95014488