# stap iodevstats.stp -T 1

starting probe

                                       read     read             write    write
            name   device     read   KB tot    B avg    write   KB tot    B avg
           sleep 253,    0        2        0      368        0        0        0
          stapio 253,    0        4        0      132        0        0        0
          stapio   0,    7        7        0        3        0        0        0
          stapio   0,    8        0        0        0        1        0       15