How can I pick up the blockchain download where it left off on another computer using an EHD?

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I started downloading the Bitcoin blockchain via my MacBook Pro onto my 1TB external hard drive. I want to use my iMac to finish the download. I plugged my EHD into my iMac and checked to blocks folder and it contained the previous transaction I downloaded (86GB). The wallet.dat, peers.dat, chainstate, banlist.dat and fee_estimates.dat files. I opened Bitcoin Core and moved the directory to the blocks folder where the previous transaction I downloaded are. I followed the steps to start the sync. I expected the blockchain to recognize the blocks and start where it left off on my MacBook but it started from the beginning. Any ideas on how to pick up where I left off?

Dr.Von

Posted 2017-01-01T19:12:44.970

Reputation: 67

Answers

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Even if you transfer all the data from a fully synced client, the bitcoin client still needs to validate those blocks. It will still take a while, but should be quicker than downloading all the data and verifying.

ANSWER IS NOT ACCURATE.
EDIT: If you copy the chainstate, there shouldn't be any work the receiving system should perform anymore - the software wouldn't even know it was moved. It's possible the wrong directory was used.

m1xolyd1an

Posted 2017-01-01T19:12:44.970

Reputation: 3 356

Thanks for the response. I was hoping that was the case and yes, it is moving faster than before. – Dr.Von – 2017-01-01T21:37:16.950

If you copy the chainstate, there shouldn't be any work the receiving system should perform anymore - the software wouldn't even know it was moved. – Pieter Wuille – 2017-01-03T10:35:07.453

Downvote. This answer is incorrect. – Pieter Wuille – 2017-01-03T10:36:34.347

Pieter, any ideas why his client would still be still syncing? – m1xolyd1an – 2017-01-03T13:18:24.613

My best guess is that he used the wrong directory. – Pieter Wuille – 2017-01-03T17:21:18.533

Answer has now been edited. – m1xolyd1an – 2017-01-03T19:08:09.257

I completed the blockchain download. My Core wallet still takes ~5 minutes to sync an hour of transactions. If I were to wait a week to resync my wallet it would take at least 8 hours. This seems fairly long and inconvenient. If I can't find a better solution I may settle with using my less secure MultiBit desktop client. – Dr.Von – 2017-01-30T16:03:55.937

Asked: 2017-01-01T19:12:44.970

Viewed: 95 times

Active: 2017-01-03T19:07:27.710