On 23.02.2012 14:25, Lamar Owen wrote: > On Wednesday, February 22, 2012 09:52:54 AM Volker Poplawski wrote: >> Hi all, >> >> I'm booting Centos6 from a usb 3.0 stick. >> >> This works fine as long as the usb-stick is connected to a usb 2.0 port. >> Once I plug the the usb-stick into a blue usb 3.0 port centos fails on >> mounting the root filesystem. >> >> Any hints on that? > > Which version of CentOS? 6.0, 6.1, or 6.2? Which kernel? > > USB3 support isn't as robust as it should be, prior to 6.2, but I've not tried booting with USB3.0. Hi Lamar. Centos 6.2 x86_64, 2.6.32-220 Got the problem (partialy) solved. The required xhci_hcd kernel module is not part of the 260 modules in the initrd for some reason. Sony Memory-Stick is included, if you happen to have one of these... I was able to rebuild the initrd plus the xhci_hdc module: mkinitrd -v --with=xhci_hdc /boot/initramfs-2.6.32-220.4.2.el6.x86_64.img `uname -r` Now, how do I tell centos to add the module everytime a new kernel is installed/updated? OpenSuse offers a setting called INITRD_MODULES="..." in /etc/sysconfig which is used by mkinitrd. Is there something similar in Centos? Regards ....Volker