So I accidentally flashed an sd to emmc image on my emmc module.  When the rock64 would not boot I took it back out and threw it back into the usb emmc adapter I got from pine64 and windows now only sees this as 15GB instead of 32GB.  I've tried to use diskpart to delete and clean everything, but nothing seems to work to get my emmc module back to working condition.  I've booted my rock64 with an SD card and used the /usr/local/bin/rock64_reset_emmc.sh script, but that doesn't seem to do anything to the emmc module itself.  I've tried to DD the entire thing, and still nothing.  Does anyone have any suggestions on how I can somehow fix these modules so I can throw new images on them??

You may want to mount the MMC on a Linux system and write 0s to the initial few blocks.

Find the device using lsblk, then run dd if=/dev/zero of=/path/to/device (/dev/sd??) bs=1M count=16. Then try again in disk part

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