Iostat

iostat allows you to view which block devices are under heavy I/O load. iostat's output looks like this: tweedleburg:~ # iostat Linux 2.6.25.18-0.2-default (tweedleburg)      12/12/08 avg-cpu: %user   %nice %system %iowait  %steal   %idle 2.52   0.00    0.54    0.89    0.00   96.05 Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn sda              8.75        76.23       322.62   40950470  173309808 sda1             8.68        76.23       322.62   40950126  173309808 sdb              0.00         0.01         0.00       4184        720 sdb1             0.00         0.00         0.00        779          0 sdb2             0.00         0.01         0.00       3029        720 sdc              0.00         0.00         0.00       2638         48 sdc1             0.00         0.00         0.00       1142         48 sde              5.94        48.31       708.14   25952348  380412440 sde1             5.94        48.31       708.14   25951388  380412440

= See also =
 * DIAGNOSTICS