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