[floogy]

dbench in single user mode (without so many background processes):

dbench version 3.04 - Copyright Andrew Tridgell 1999-2004

Running for 60 seconds with load '/usr/share/dbench/client.txt' and minimum warmup 12 secs
50 clients started
  50       448   255.52 MB/sec  warmup   1 sec
  50      1073   257.03 MB/sec  warmup   2 sec
 ...
  50      4365   150.47 MB/sec  warmup  11 sec
  50      4405   140.25 MB/sec  warmup  12 sec
  50      4597    24.95 MB/sec  execute   1 sec
  50      4852    62.53 MB/sec  execute   2 sec
  50      4908    50.77 MB/sec  execute   3 sec
 ...
  50     13642    81.52 MB/sec  execute  34 sec
  50     14558    86.04 MB/sec  execute  35 sec
  50     15417    90.10 MB/sec  execute  36 sec
  ...
  50     27510   116.09 MB/sec  execute  56 sec
  50     28034   117.13 MB/sec  execute  57 sec
  50     28573   117.71 MB/sec  execute  58 sec
  50     29222   118.54 MB/sec  execute  59 sec
  50     29706   118.58 MB/sec  execute  60 sec
  50     29971   117.64 MB/sec  cleanup  61 sec
  50     29971   115.75 MB/sec  cleanup  62 sec
  50     29971   113.91 MB/sec  cleanup  63 sec
  50     29971   112.14 MB/sec  cleanup  64 sec

Throughput 117.654 MB/sec 50 procs

That looks really fine to me :-)