I'm on a Thinkpad T510 and I accidentally plugged my Razor USB mouse into the eSata port not realizing my error because it has been working fine this whole time. Does this seem a little odd?
Windows – I accidentally plugged the USB mouse into the eSata port… it works
esatamousethinkpadusbwindows 7
Best Answer
It sounds like you have a USB/eSATA combo port AKA eSATAp. Which enables you to use either the USB or the eSATA on that particular port.
Picture taken from: techarena's forum.
Serial ATA (Wikipedia).