mmc_test: how use mmc_test on only eMMC board

Hi mailing..

I want to know how use mmc_test..

In my case, i used only eMMC board.
So i didn't use unbind/bind for mmc_test.

echo mmc0:0001 > /sys/bus/mmc/drivers/mmcblk/unbind then rootfs of my board has be broken

Plz let me know..

Regards,
Jaehoon Chung

Hi,

mmc_test destroys the data on the card being tested, so there is no way to use it on your active rootfs.

You would have to boot from external SD (or USB, or network, or something else) in order to run it on your internal eMMC. If you do this, first make sure your eMMC doesn't contain any data needed to boot your system far enough to be able to boot a kernel from another device.

- Chris.

Chris Ball   <[email protected]>   <http://printf.net/>
One Laptop Per Child

Hi,

Thanks for your comment. i know that i can use SD-boot in order to use mmc_test. but if there is other method, i want to know them.
I try to boot with SD-card..

Thanks Chris. :)

Regards,
Jaehoon Chung