Upon every start of
bitcoind, I see the following in de debug log:
Verifying last 288 blocks at level 3
come up. At this point, no new blocks have been downloaded and the block chain was 100% up to date when I last closed bitcoin. Bitcoind does not do anything before it has 'verified' these 288 blocks (the server does not answer until this phase has passed).
- Why do the last blocks need to be verified if nothing new has been added since shutdown?
- Does this verification make any changes to any files? Does it save anything to the blocks / chainstate / database directories?