eMMC doesn't work (/dev/mmcblk1 is gone)

i tried to flashing ubuntu image to eMMC. but after a while 5V power supply mulfunction so i didn’t finish flashing.

after then my BBB doesn’t have mmcblk1.

this is message at booting by debian (not emmc version)

I used to debug some hardware at P8, P9 for DAC.

anybody have this problem ?