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[Q] iostat output question ???



We have several servers installed Redhat AS 2.1
(update 3).  I use "iostat -x 5" to check I/O
performance.  It show some disks 100% utilize always. 
I don't think it is correct.  Does anyone know what
wrong it is and how to reset?

Output of "iostat -x 5":

avg-cpu:  %user   %nice    %sys   %idle
           0.00    0.00    0.00  100.00

Device:  rrqm/s wrqm/s   r/s   w/s  rsec/s  wsec/s
avgrq-sz avgqu-sz   await  svctm  %util
emcpowera
           0.00   2.20  0.00  1.80    0.00   32.00   
17.78  3620.00    0.00 5555.56 100.00
emcpowera1
           0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
emcpowera2
           0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
emcpowera3
           0.00   2.20  0.00  1.80    0.00   32.00   
17.78   600.00    0.00 5555.56 100.00
emcpowerc
           0.00   0.00  0.00  0.00    0.00    0.00    
0.00   660.00    0.00   0.00 100.00
emcpowerc1
           0.00   0.00  0.00  0.00    0.00    0.00    
0.00   350.00    0.00   0.00 100.00
sda        0.00  14.20  0.00  3.80    0.00  144.00   
37.89     0.00    0.00   0.00   0.00
sda1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sda2       0.00  11.00  0.00  1.40    0.00   99.20   
70.86     0.00    0.00   0.00   0.00
sda3       0.00   3.20  0.00  2.40    0.00   44.80   
18.67     0.00    0.00   0.00   0.00
sdb        0.00   3.20  0.00  2.40    0.00   44.80   
18.67     0.00    0.00   0.00   0.00
sdb1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb2       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb3       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb4       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb5       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb6       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdb7       0.00   3.20  0.00  2.40    0.00   44.80   
18.67     0.00    0.00   0.00   0.00
sdc        0.00   1.00  0.00  1.00    0.00   16.00   
16.00     0.00    0.00   0.00   0.00
sdc1       0.00   1.00  0.00  1.00    0.00   16.00   
16.00     0.00    0.00   0.00   0.00
sdf        0.00   0.00  0.00  0.80    0.00   17.60   
22.00 8588474.59    0.00 12500.00 100.00
sdf1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdf2       0.00   0.00  0.00  0.00    0.00    0.00    
0.00    10.00    0.00   0.00 100.00
sdf3       0.00   0.00  0.00  0.80    0.00   17.60   
22.00 8587094.59    0.00 12500.00 100.00
sdg        0.00   0.00  0.00  0.00    0.00    0.00    
0.00 8589734.59    0.00   0.00 100.00
sdg1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00 8589414.59    0.00   0.00 100.00
sdh        0.00   0.00  0.00  1.00    0.00   14.40   
14.40 8588224.59    0.00 10000.00 100.00
sdh1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdh2       0.00   0.00  0.00  0.00    0.00    0.00    
0.00     0.00    0.00   0.00   0.00
sdh3       0.00   0.00  0.00  1.00    0.00   14.40   
14.40 8586984.59    0.00 10000.00 100.00
sdi        0.00   0.00  0.00  0.00    0.00    0.00    
0.00    80.00    0.00   0.00 100.00
sdi1       0.00   0.00  0.00  0.00    0.00    0.00    
0.00 8589404.59    0.00   0.00 100.00

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