Fixing docker service startup after using an alternative graph driver

So I was playing around with devicemapper docker storage driver the other day. It was quite nice but when I stopped the modified docker daemon and tried to start the docker service in “normal” way, I received the following error:

Clearly something had gone wrong. Upon running:

I found the following line most helpful in fixing the error:

So I ran the following command in order to remove my devicemapper driver:

Boom it worked!

Alternatively, I could’ve backed it up to tmp instead by running:

But I didn’t need any of my images anyway so I removed it.

Hope this helps.

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