Most hard disk manufactures have various OS diagnostic and benchmark freeware applications available for download from their respective web sites.
Examples;
<A HREF="http://www.storage.ibm.com/techsup/hddtech/hddtech.htm" target="_new">IBM</A>
and
<A HREF="http://www.maxtor.com/Maxtorhome.htm?http&&&www.maxtor.com/products/" target="_new">Maxtor</A>
and other good places to look;
<A HREF="http://www6.tomshardware.com/site/links.html" target="_new">THW Links</A>
and
<A HREF="http://www.tweakfiles.com/" target="_new">TweakFiles.com</A>
<A HREF="http://www.beerology.com/ars/viewresults.cfm?ArsID=Sniffer" target="_new"><i><font color=blue>=Sniffer=</font color=blue></i></A>