Well, I bought my current PC in late November 1998, and the IBM 9,1gb hdd 7200 rpm still works(obviously, or else I wouldn't be writing this, heh) after daily (ab)use since then.
I'm not going to dismantle it to check the production date, but it surely must be somewhat earlier than November. Seems like they started making this speed already in 1997, judging by this article (page 3 bottom):
http://ftp.serdica.org/public/drivers/HDD/IBM/7200value-pdf/
I suspect there should be smaller models than mine, but unable to locate any info.
But here are some other interesting(well, for this topic at least?) articles I stumbled over:
http://www.storagereview.com/articles/9806/98 … del=DTTA-371440
Mentions other companies and their models:
"Medalist Pro 7200 and DiamondMax 2880".
And looks like Seagate actually came out first:
http://www.redhill.net.au/d/80.php
http://www.storagereview.com/articles/9808/98 … ataroundup.html