I had a levelDB issue myself a couple of weeks ago. FYI there's a couple of CLI options to bitcoind called -reindex and -reindex-chainstate that are probably faster than starting over.
https://bitcoin.stackexchange.com/questions/65680/how-to-recover-corrupted-bitcoin-core-blockchain
I know... I hit
LevelDB read failure: Corruption: block checksum mismatch: /titan/bitcoin/chainstate/612920.ldb
during reindex, so I have to start over
I have talked to so many people and it happens way more often than core devs want to admit. its easy to blame hardware issues but I never seem to have any issues anywhere else.
the only thing I can think of is some ACID issue with leveldb, maybe with its configuration. not sure if it has been smoke tested.
