Downloading the chaidata files with geth
I downloaded the ethereum blockchain yesterday (geth --rpc --fast -- cache=1024) I did not mine at all, today it is different, clearly if I run it again will it append the new data to update the blockchain in my computer or does it start from scratch. Or will the mining software update it?
It downloaded 12.8 GB and now it is growing again.... in 30 minutes it has appended data now it is 13.5 GB in size. Something is not right
If the power goes down do I have to download the whole blockchain again?
Once this is solved I want to mine with cpp-ethereum-windows-v1.2.9.exe
Any suggestions will be appreciated. Running in Winows 8.1