Hmmm - Not 100% sure if this will solve it, however try installing 
kernel-xen from http://www.crc.id.au/repo

Its kernel version 2.6.32.41 - and although it has the extensions to run 
as a Xen Dom0, most of the config should be the same as a stock EL6 
kernel...

-- 
Steven Haigh

Email: [log in to unmask]
Web: http://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299

On 8/07/2011 6:09 AM, Yasha Karant wrote:
> I have done several tests with various kernels in an attempt to get full
> USB 3 external hard drives to work.
>
> Here are the results.
>
> Using sl6rolling, 2.6.32-131.0.15.el6.x86_64 , USB 3 is not working.
> Although this kernel is that of RHEL 6.1 in which there is supposed to
> be full USB 3 support, no go.
>
> Following a suggestion from Connie Sieh, I installed the Fedora 15 kernel,
> 2.6.38.6-26.rc1.fc15.x86_64
>
> This has fully working USB 3, same as I observed in OpenSUSE , evidence
> below.
>
> To get the Fedora 15 kernel to work, I needed to install the Fedora 15
> linux firmware RPM. Before doing so, as root, I did mv /lib/firmware
> /lib/firmware-SL6 . For a reason to be explained below, I have now
> rebooted the system into the latest production SL 6 kernel but still
> using the Fedora 15 firmware, and this does seem to work -- kernel
> 2.6.32-131.2.1.el6.x86_64 .
>
> The reason I switched back to no USB 3 support is that I could not build
> the Nvidia drivers, needed for full CUDA support, because the Fedora 15
> kernel demanded a later gcc than SL 6 uses. I am loathe to change gcc
> because of the large number of dependencies upon the specific gcc used.
>
> Hence, has anyone built the Nvidia packages
> (NVIDIA-Linux-x86_64-270.41.19.run or later) for Fedora 15 kernel
> 2.6.38.6-26.rc1.fc15.x86_64 so that I could get the appropriate modules,
> etc., and thus have full CUDA support?
>
> Evidence that the Fedora 15 2.6.38.6-26.rc1.fc15.x86_64 kernel supports
> USB 3:
>
> Bus 008 Device 002: ID 152d:0551 JMicron Technology Corp. / JMicron USA
> Technology Corp.
> Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 002: ID 03f0:0317 Hewlett-Packard LaserJet 1200
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 002: ID 0424:2504 Standard Microsystems Corp. USB 2.0 Hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
>
> Script started on Thu 07 Jul 2011 12:40:22 PM PDT
> [root@jb344 ykarant]# fdisk /dev/sde
>
> WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
> switch off the mode (command 'c') and change display units to
> sectors (command 'u').
>
> Command (m for help): p
>
> Disk /dev/sde: 1000.2 GB, 1000204886016 bytes
> 255 heads, 63 sectors/track, 121601 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x706a2c16
>
> Device Boot Start End Blocks Id System
> /dev/sde1 * 1 32 257008+ 83 Linux
> /dev/sde2 33 12780 102398310 83 Linux
> /dev/sde3 12781 25528 102398310 83 Linux
> /dev/sde4 25529 77825 420075652+ 5 Extended
> /dev/sde5 25529 38276 102398278+ 83 Linux
> /dev/sde6 38277 43375 40957686 83 Linux
> /dev/sde7 43376 48474 40957686 83 Linux
> /dev/sde8 48475 53573 40957686 83 Linux
> /dev/sde9 53574 58672 40957686 83 Linux
> /dev/sde10 58673 58927 2048256 82 Linux swap / Solaris
> /dev/sde11 58928 60801 15052873+ 83 Linux
> /dev/sde12 60802 77825 136745248+ 83 Linux
>
> Command (m for help): q
>
> [root@jb344 ykarant]# exit
> exit
>
> Script done on Thu 07 Jul 2011 12:40:43 PM PDT
>
> Yasha Karant