Mass Storage Interfaces
EPM-19 Hardware Reference Manual
24
If you remove the microSD card at any time and allow the board to boot without the card
installed, the boot order setting will be cleared and you will have to set it up again the next
time you use a microSD card.
If you remove the microSD card while the board is powered on and the OS attempts to access
a file on the “drive” (that is, the microSD card) the results are unpredictable. The best case
scenario is that the drive drops out (as it would in Windows Explorer when running
Windows 7 from a SATA drive and using the microSD as an additional hard drive).
However, if Windows does not try to access the microSD card while you have it out and you
put it back in (again, in Windows 7 at least) the system does not appear to have noticed it
was ever removed.