USB驱动压力测试问题

thzhr2009

cpu：BCM5892
linux2.6.32.9
usb otg驱动加载，外接U盘。压力测试方法：

load OTG driver modules
sleep 10
mount /dev/sda1 /mnt/usbd
ls /mnt/usbd
umount /mnt/usbd
unload OTG driver modules
loop again
循环测试两千多次后出错:
mount: mounting /dev/sda1 on /mnt/usbd failed: No such file or directory
umount: cannot umount /mnt/usbd: Invalid argument
找不到usb的设备节点/dev/sda1了，有没有遇到类似情况的朋友提供帮助。

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