Long time forum forager, first time poster.

I bought a Toshiba 500 GB usb 3.0 hard drive last week and instantly ran home to see how fast I could push it. On my desktop (that I built) I was able to get 200 MB/sec. On my laptop (MSI FX something or other), which I dual boot Windows 7/Ubuntu 11.10, I was able to get about 120 MB/sec on Windows, but on Ubuntu, i get about 25 MB/sec.

lsusb shows:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 003: ID 0bda:0139 Realtek Semiconductor Corp.

Bus 002 Device 003: ID 1532:0015 Razer USA, Ltd

Bus 004 Device 002: ID 0480:a007 Toshiba America Info. Systems, Inc.

lspci -vvv shows that the USB 3.0 host controller is using the kernel driver in use is xhci_hcd.

dmesg |grep usb shows:

[ 1815.455368] usb 4-1: new SuperSpeed USB device number 2 using xhci_hcd

[ 1815.475459] scsi7 : usb-storage 4-1:1.0

The built in disk utility says its connected via usb at 705 MB/s, but that's not what it reports when I transfer files over to it.

Not really sure what to do at this point. Any help would be very nice, thank you.