Listing 1: iostat

$ iostat -x 30
                                 extended disk statistics
disk      r/s  w/s   Kr/s   Kw/s wait actv  svc_t  %w  %b
fd0       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0
sd0       0.1  1.8    0.7   14.7  0.0  0.3  150.9   0   2
sd1       0.3 15.6    0.9   87.9  0.0  0.4   25.6   0  19
sd2       0.0  0.4    0.0    2.0  0.0  0.0   18.2   0   0
sd3       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0
                                 extended disk statistics
disk      r/s  w/s   Kr/s   Kw/s wait actv  svc_t  %w  %b
fd0       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0
sd0       0.0  1.7    0.0   13.3  0.0  0.2  142.3   0   2
sd1       0.5 18.2    4.0  114.1  0.0  0.7   37.2   0  21
sd2       0.1  0.1    0.1    0.2  0.0  0.0   10.5   0   0
sd3       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0
                                 extended disk statistics
disk      r/s  w/s   Kr/s   Kw/s wait actv  svc_t  %w  %b
fd0       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0
sd0       0.0  1.8    0.0   13.5  0.0  0.2  135.5   0   2
sd1       0.3  6.6    1.4   45.1  0.0  0.7   95.6   0   8
sd2       0.0  0.3    0.0    1.7  0.0  0.0   12.0   0   0
sd3       0.0  0.0    0.0    0.0  0.0  0.0    0.0   0   0