WRL-6.0 usb driver with broadcom XLP2xx CPU has a bug. When U disk is used on the broadcom XLP2xx board, the WRL-6.0 kernel can't find the U disk. The U disk works fine when it is used with the broadcom SDK 3.0.1 Linux kernel.
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Use a USB disk on the broadcom XLP2xx board. The setup.log and config.log files are attached.