I didn't check on the running Geth instance and when I executed a function that logs everything in the Blockchain, I had an error that the port I was listening to wasn't responding. I figured out that there wasn't enough space in my storage so I upgraded it. After I upgraded the storage, I've been seeing this error when I try to sync my node:
Fatal: Error starting protocol stack: missing block number for head header hash
I couldn't resolve it nor can I use
geth attach. Geth instantly terminates after displaying that error. Is resyncing the only way to solve this? I've also read that after resyncing, the problem will still persist.