Sounds like either they have a restriction built into the controller or they are lying. Can you show me a link to where you saw this?
Thanks for the reply, Computer semi-expert.
Here is the link :
https://www.ebay.ca/itm/Desktop-HDD-160GB-7200RPM-SATA-3Gb-s-8MB-Cache-3-5-Inch-NAS-Hard-Disk-Drive/352565374107?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=308e5370c2ab4537880d53d8951ef49f&pid=100675&rk=3&rkt=15&sd=123804713777&itm=352565374107&pmt=1&noa=1&pg=2481888&_trksid=p2481888.c100675.m4236&_trkparms=pageci:b88a7402-cff1-11e9-9bd2-74dbd1807750|parentrq:0209f55516d0abc05ac9b9b4ffc41f85|iid:1
and also
https://www.ebay.ca/itm/Internal-Hard-Drive-500GB-SATA-3Gb-s-16MB-Cache-3-5-Inch-Desktop-Replacement/163666796435?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=308e5370c2ab4537880d53d8951ef49f&pid=100675&rk=4&rkt=15&sd=123804713777&itm=163666796435&pmt=0&noa=1&pg=2481888&_trksid=p2481888.c100675.m4236&_trkparms=pageci:b88a7402-cff1-11e9-9bd2-74dbd1807750|parentrq:0209f55516d0abc05ac9b9b4ffc41f85|iid:1