<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi John,<DIV><BR class="khtml-block-placeholder"></DIV><DIV>Here are the "raw" numbers for each, but you'll never see this speed on any of these interfaces. ;)</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I'm converting all of them to megabytes per second...</DIV><DIV><BR><DIV><DIV>On Apr 24, 2007, at 12:44 PM, John Niven wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">Does anybody have any idea how the speeds compare</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">between:</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande; min-height: 15.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">SCSI U160</FONT></P></BLOCKQUOTE>U160 is rated at 160 MB per second.</DIV><DIV><BR><BLOCKQUOTE type="cite"> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">ATA66</FONT></P></BLOCKQUOTE><DIV>66 MB per second</DIV><BR><BLOCKQUOTE type="cite"> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">SATA 1<SPAN class="Apple-converted-space"> </SPAN></FONT></P></BLOCKQUOTE><DIV>1.5 Gbits per second converts to 187 MB per second. Overhead drops this to 150 MB per second, but it's rare to see this speed.</DIV><BR><BLOCKQUOTE type="cite"> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">Firewire 400</FONT></P></BLOCKQUOTE><DIV>400 Mbits per second equals 50 MB per second</DIV><BR><BLOCKQUOTE type="cite"> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">Firewire 800</FONT></P></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV>800 Mbits per second equals 100 MB per second.<BR><BLOCKQUOTE type="cite"> <P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande; min-height: 15.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Lucida Grande" size="3" style="font: 12.0px Lucida Grande">They are all specced in different ways....</FONT></P> </BLOCKQUOTE></DIV><BR></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Note that many of these are burst rates... that is, the interface can flow this, but only for a very short time.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>If you look up the following terms on Wikipedia, you'll get more info than you'll ever want:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>SCSI</DIV><DIV>Ultra SCSI</DIV><DIV>FireWire</DIV><DIV>SATA</DIV><DIV>ATA66</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>smiles,</DIV><DIV>Jamie</DIV><DIV><BR class="khtml-block-placeholder"></DIV></BODY></HTML>