MSD device seen as boot disk

[acremonini]

Hi,

I'm developing a USB composite device with CDC and MSD, using MQX 4.2 and USB v2 stack on a K60 MCU.

Everything works fine but I'm having a little issue: when I turn on my PC with the USB device connected, the PC somehow sees it as a boot disk and tries to boot from the msd disk (it obviously shows an error message: "Attempting to boot from USB Device. Non-system disk").

How can I set my msd device to avoid this? I think it should be possible, because I can turn on my PC with any pendrive without the same problem.

Thanks, 

Antonio

[danielchen]

Hi Antonio:

I think maybe there is some error in the first sector in your MSD.

Regards

Daniel