I recently downloaded bitcoin core. Took about 1+ week to download 80%. One day I checked, it got an error message. When I closed and reopened the bitcoin core, it started reindexing. Any idea how long this will take? Turned it off after a day of "calculating indexing time". Was trying to mine low to no fee transactions as I start getting into bitcoin.
2017-10-18 05:36:19 receive version message: /Satoshi:0.15.0.1/: version 70015, blocks=490420, us=18.104.22.168:62505, peer=1908 2017-10-18 05:37:32 Pre-allocating up to position 0x6000000 in blk00622.dat 2017-10-18 05:37:45 receive version message: /Satoshi:0.13.1/: version 70014, blocks=490420, us=22.214.171.124:62519, peer=1909 2017-10-18 05:39:29 Pre-allocating up to position 0x7000000 in blk00622.dat 2017-10-18 05:40:07 socket send error An existing connection was forcibly closed by the remote host. (10054) 2017-10-18 05:40:37 receive version message: /Satoshi:0.14.2/: version 70015, blocks=490420, us=126.96.36.199:62551, peer=1910 2017-10-18 05:41:03 Pre-allocating up to position 0x8000000 in blk00622.dat 2017-10-18 05:41:44 ProcessMessages(version, 113 bytes) FAILED peer=1911