I have a couple of wd5000AADS sata caviar green 500gb drives that I wish to use in an external usb twin bay hdd enclosure but they are not appearing ie mounted as drive letters on my pc, even though the pc knows they are there. The 300gb drives they are replacing plug and played fine. Do I need to j…

Do I need jumpers?

fzabkar September 7, 2014, 11:26pm 3

Perhaps the enclosure is limited to 1.5Gbps. Try installing the drive’s OPT1 jumper to limit the SATA link rate.