<div dir="ltr">I don't get it -- you feel cheated because you paid for something that you thought was 3.5" wide and you got *more*? And it fit perfectly where you wanted to put it? And it had all the other specifications you desired? You're just weird, man.<div>
<br></div><div style>I always assumed the measurement referred to the physical media, not the device as a whole. Have you measured a 3.5" floppy, with and without the hard shell?</div><div style><br></div><div style>
Kevin</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jan 21, 2013 at 3:18 PM, Adam Thompson <span dir="ltr"><<a href="mailto:athompso@athompso.net" target="_blank">athompso@athompso.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ever double-check an assumption, only to find it false, and feel like the rug just got yanked out from under your feet?<br>
<br>
Go measure the width of a so-called 3.5" hard drive. Yeah, go ahead. It's 4" wide. Now go measure the width of a so-called 2.5" hard drive. Uh-huh... it's 2.75" wide. I just (re-?)discovered that and felt just as cheated as when I found out that the nominal sizes of dimensional lumber are complete B.S.!<br>
<br>
I knew this once upon a time, but I guess I forgot... 5.25" & 3.5" refer to the fact that it fits into the bay where you would have been able to fit a floppy drive accommodating the corresponding-size floppy disk. I can't find any derivation for why we call a 2.75" drive a 2.5" drive, since there's no such thing as a 2.5" floppy[1]! Perhaps the internal platter is 2.5" wide?<br>
<br>
(See: <a href="http://en.wikipedia.org/wiki/Hard_disk_drive#Form_factors" target="_blank">http://en.wikipedia.org/wiki/Hard_disk_drive#Form_factors</a>)<br>
<br>
-Adam<br>
<br>
<br>
[1] OK, yes, there a 2.5" floppy did exist briefly, but it was never any sort of standard and I've never seen one in person AFAIK. FYI, the Sony micro-floppy format was not 2.5", it was 90mm (closer to 2", anyway).<br>
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