I have high io stat. High writes. But what files are being written?

avg-cpu: %user %nice %system %iowait %steal %idle 11.50 0.02 5.38 0.07 0.00 83.04 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sdc 0.01 89.92 0.26 41.59 3.36 457.19 22.01 0.23 5.60 0.09 0.38 sdb 0.10 15.59 0.40 14.55 8.96 120.57 17.33 0.04 2.91 0.07 0.11 sda 0.13 45.37 0.96 8.09 20.06 213.56 51.63 0.02 2.64 0.16 0.14 sde 0.01 31.83 0.09 11.34 0.94 103.56 18.29 0.04 3.52 0.14 0.16 sdd 0.01 48.01 0.13 19.81 1.58 202.16 20.44 0.11 5.62 0.13 0.25 Is there a way to know what files are being written? 457 kB/s Also this other linux machine have this same problem. avg-cpu: %user %nice %system %iowait %steal %idle 20.50 0.00 46.48 20.74 0.00 12.28 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.17 11.61 0.99 3.51 36.65 59.43 42.70 0.10 23.20 3.84 1.73 sdb 0.55 224.18 24.30 97.45 246.48 1287.12 25.19 3.96 32.53 7.88 95.91 sdd 0.53 226.75 25.56 90.96 283.50 1271.69 26.69 3.43 29.44 8.22 95.75 sdc 0.00 1.76 0.28 0.06 4.73 7.26 70.41 0.00 12.00 2.12 0.07 dm-0 0.00 0.00 1.11 14.77 36.41 58.92 12.01 1.00 62.86 1.09 1.74 dm-1 0.00 0.00 0.04 0.12 0.17 0.49 8.00 0.00 21.79 2.47 0.04 dm-2 0.00 0.00 0.01 0.00 0.05 0.01 8.50 0.00 7.90 2.08 0.00 1200 write request per second for a server that host nothing