iozone performs a large number of performance benchmark tests against a drive.

The output produced by iozone is very brief though. The default command line option -a is used for full automatic mode, in which iozone will test block sizes ranging from 4k to 16M and file sizes ranging from 64k to 512M.

Lets do a test using this -a option and see what happens.

iozone -a /dev/sda1

Result:

         
Auto Mode
        
Command line used: iozone -a /dev/sda1
        
Output 
is
 
in
 
Kbytes/sec
        
Time Resolution = 
0.000001
 
seconds.
        
Processor cache size 
set
 
to 
1024
 
Kbytes.
        
Processor cache line size 
set
 
to 
32
 
bytes.
        
File stride size 
set
 
to 
17
 
* record size.
                                                            
random  random    bkwd   record   stride
              
KB  reclen   write rewrite    read    reread    read   write    read  rewrite     read   fwrite frewrite   fread  freread
              
64
       
4
  
172945
  
581241
  
1186518
  
1563640
  
877647
  
374157
  
484928
   
240642
   
985893
   
633901
   
652867
 
1017433
  
1450619
              
64
       
8
   
25549
  
345725
   
516034
  
2199541
 
1229452
  
338782
  
415666
   
470666
  
1393409
   
799055
   
753110
 
1335973
  
2071017
              
64
      
16
   
68231
  
810152
  
1887586
  
2559717
 
1562320
  
791144
 
1309119
   
222313
  
1421031
   
790115
   
538032
  
694760
  
2462048
              
64
      
32
  
338417
  
799198
  
1884189
  
2898148
 
1733988
  
864568
 
1421505
   
771741
  
1734912
  
1085107
  
1332240
 
1644921
  
2788472
              
64
      
64
   
31775
  
811096
  
1999576
  
3202752
 
1832347
  
385702
 
1421148
   
771134
  
1733146
   
864224
   
942626
 
2006627
  
3057595
             
128
       
4
  
269540
  
699126
  
1318194
  
1525916
  
390257
  
407760
  
790259
   
154585
   
649980
   
680625
   
684461
 
1254971
  
1487281
             
128
       
8
  
284495
  
837250
  
1941107
  
2289303
 
1420662
  
779975
  
825344
   
558859
  
1505947
   
815392
   
618235
  
969958
  
2130559
             
128
      
16
  
277078
  
482933
  
1112790
  
2559604
 
1505182
  
630556
 
1560617
   
624143
  
1880886
   
954878
   
962868
 
1682473
  
2464581
             
128
      
32
  
254925
  
646594
  
1999671
  
2845290
 
2100561
  
554291
 
1581773
   
723415
  
2095628
  
1057335
  
1049712
 
2061550
  
2850336
             
128
      
64
  
182344
  
871319
  
2412939
   
609440
 
2249929
  
941090
 
1827150
  
1007712
  
2249754
  
1113206
  
1578345
 
2132336
  
3052578
             
128
     
128
  
301873
  
595485
  
2788953
  
2555042
 
2131042
  
963078
  
762218
   
494164
  
1937294
   
564075
  
1016490
 
2067590
  
2559306