Disk performance/benchmarking

[Gabriel George POPA]

           Hello all,

  Could someone tell me which is the most used disk-benchmarking 
solution for OpenBSD 3.8?
I'm running a small production server and I don't want to disrupt (too 
much) its activity. I would like
of course to perform non-destructive tests. I think there's somethink 
wrong with my disk/os performance
but I don't know where to start. I think a benchmark utility will be 
good (SMART neveals nothing).
  He he he. I think all people are concerned about OpenBSD performance 
these days...

                                                                                                            
Yours in BSDness,
                                                                                                                       
Gabriel George POPA