I am using XP X64 and have two external seagate 2t green drives in\nThermatake A2395 Silver River Duo enclosures. I was having problems with\none of the drives and thought either the enclosure or the new drive was\nbad. I tested the drive internally and it's fine and also tested the\nenclosure with another drive and it's good. I have installed two of the (2)\nport usb brackets to the blue internal headers. I was using both external\ndrives on the same bracket and discovered on boot screen that "01" was seen\nas high speed and "02" did not display high speed. I have connected each\ndrive to a different bracket and at boot both show high speed.\n\nAt one point I installed the Marvel ESATA driver but later decided to use\nboth drives as usb so I uninstalled the driver. When I had problems with\nthe one drive I reinstalled the marvel driver and both drives work fine on\nthe ESATA port. I have come to the conclusion that whether or not you are\nusing the ESATA port it's not a bad idea to install the driver anyway and\njust disable the boot rom. I may be wrong but ever since I reloaded the\ndriver both drives work flawless as USB. BTW, the bios settings are\ncorrectly set for the ESATA to work.\n\nDoes anyone know if it's best not to have two high speed devices on the\nsame usb port pair? It seems like all ports should be high speed and that\nyou should be able to connect whatever device to any port. Or does the\nmarvel driver have a positive effect on the usb ports?\n\nBTW, thanks again to Paul and Rob for helping me a few months back with\nESATA issues I had.\n\nI decided to post my findings in hopes of helping others that are having\nweird quirks with ESATA or USB.