BeagleBone Black data not persisting on eMMC memory

[spudgunner]

So after my struggles with getting Arch Linux installed to the eMMC memory, I have been running Arch on the BeagleBone Black for a few days with no troubles. I formatted my SD card to use as extra storage for the BeagleBone and inserted it into the slot, but nothing new showed up in /dev. Whatever, try a reboot and see if it shows up (via "reboot" command). Board reboots but my root password doesn't work. I try the default, get in, and find that all the tinkering I've done has been wiped out (but the SD card shows up as a block device now!). I was under the impression that the eMMC was a permanent type of memory that was supposed to last between reboots and power disconnects.

What am I doing wrong?

[photomankc]

Take out the SD card and reboot. Does it then go back to the custom password you set?

[WarheadsSE]

It seems like you may have been working from your SD card

[spudgunner]

Damn, this could be a really stupid mistake, now I feel like an idiot. I could have sworn that I formatted the SD card before putting it back in, but apparently I did not. Sorry for the wasting of the time.