iostat -k 1
Linux 2.6.18-8.1.15.el5PAE (canis)      02/25/2008

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           6.80    0.00    2.06   12.61    0.00   78.53

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda              12.00         2.04        60.74   17964505  535587572
sdb              11.95         1.95        60.74   17227972  535587572
sdc               0.00         0.00         0.00        196         32
sdd               0.00         0.00         0.00       1964          0
sde             153.16         1.32        80.55   11598133  710257560
sdf             176.12         0.71        80.55    6225344  710257560
sdg             176.84         1.22       206.35   10729232 1819521808
sdh             144.55         0.72       206.35    6317772 1819521808
md0             257.61         3.99        55.63   35192085  490541916
md1             375.53         3.95        37.83   34868637  333609544

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           3.37    0.00    2.99    8.85    0.00   84.79

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda               0.00         0.00         0.00          0          0
sdb               0.98         3.92         0.00          4          0
sdc               0.00         0.00         0.00          0          0
sdd               0.00         0.00         0.00          0          0
sde               0.00         0.00         0.00          0          0
sdf               0.00         0.00         0.00          0          0
sdg               0.00         0.00         0.00          0          0
sdh               0.00         0.00         0.00          0          0
md0               0.98         3.92         0.00          4          0
md1               0.00         0.00         0.00          0          0

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           3.12    0.00    3.12    5.12    0.00   88.64

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda               5.00         0.00       268.00          0        268
sdb               1.00         0.00         8.00          0          8
sdc               0.00         0.00         0.00          0          0
sdd               0.00         0.00         0.00          0          0
sde               0.00         0.00         0.00          0          0
sdf               0.00         0.00         0.00          0          0
sdg               0.00         0.00         0.00          0          0
sdh               0.00         0.00         0.00          0          0
md0            2523.00         0.00     10092.00          0      10092
md1               0.00         0.00         0.00          0          0

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           1.00    0.00    1.75   13.75    0.00   83.50

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda              38.00         0.00      9928.00          0       9928
sdb              42.00         0.00     10188.00          0      10188
sdc               0.00         0.00         0.00          0          0
sdd               0.00         0.00         0.00          0          0
sde             752.00         0.00      5688.00          0       5688
sdf             864.00         0.00      6284.00          0       6284
sdg             897.00         0.00      6372.00          0       6372
sdh             741.00         0.00      5644.00          0       5644
md0              22.00         0.00        88.00          0         88
md1           27080.00         0.00    108320.00          0     108320

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          10.36    0.00    2.50   22.97    0.00   64.17

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda               0.00         0.00         0.00          0          0
sdb               0.00         0.00         0.00          0          0
sdc               0.00         0.00         0.00          0          0
sdd               0.00         0.00         0.00          0          0
sde            1414.14         0.00     10945.45          0      10836
sdf            1498.99         0.00     10808.08          0      10700
sdg            1445.45         0.00     10686.87          0      10580
sdh            1401.01         0.00     10836.36          0      10728
md0               0.00         0.00         0.00          0          0
md1               0.00         0.00         0.00          0          0