There are many programs like that out there. I personally use HDTune but there are others you can try.Remove the "#" and the link works.
Like so:
http://pineight.com/gba/cf_bench
Sorry, it works fine for me in Firefox so I assumed I didn't need to take out the pound sign. My apologies.
sorry not that
its a computer program
tests the read speed ,write , errors things like that