I found a solution for this issue, it's explained on this page http://ubuntuforums.org/showthread.php?t=1680278
Sure it would be wonderfull if sooner or later this issue is solved with the distro " out of the box " without the necessity of modifying grub Hope to hear something about this Thanks Cheers -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/843764 Title: Oneiric current, USB 3 capable External Box with a 3.5 sata disk inside doesn't work when attached to USB 3 port, works perfect on USB 2 port. AsRock 880GMH/USB3 motherboard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/843764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs