I am running private blockchain using geth and my miners has stopped mining the data. A few days back I have removed old files from .ethash folder ... I am just wondering if that could be the reason that my miners are not working anymore.
Also, somewhere I read that I can remove .ethash folder completetly and the restart the blockchain but my concern is if I will restart the chain then will I loose existing data of chain?
Am I right and is there anything I can do?