If the error persist after reaching the height where you've encountered the error, your blockchain may have been corrupted by the sudden shutdown.
If so, you can open your "
debug.log" file from bitcoin data directory (
default location) to check for errors related to the corrupted block or for possible other issues.
Thank you. I see errors in the debug.
May I show this last section here? I do not know what to do.
The error may be logged before you opened bitcoind with reindex, have you experienced the same error after -reindex?
Yes you can, there's nothing in the debug log that can compromise your private keys, only some privacy-related info.
Can I delete files until the last sync?
Can I save the blockchain and restart it in case of a PC crash?
- (CMIIAW) I think you can delete the last block file and Bitcoin Core will detect it and will issue -reindex then it will sync starting from the last valid block.
However, if your blockchain is pruned, it will sync from start if you do that. - Yes, but not just the blockchain, if you're going to back it up, you may as well backup the whole data directory.