Preflight check error input/output

[Pac]

You could try the procedure to fix malformed databases:

More help about database disk image is malformed

You could try to fix it by following these instructions: If it doesn’t work, a node can still be recovered even if some databases were to be lost: here is how they can be recreated: In last resort if everything else fails, deleting all database files should work, but you would lose all statistics for current month, and possibly some of your earnings for current month also, but at least the node would be “saved”.

If it does not work, then yes you can try @Alexey’s steps above:

Preflight check error input/output

You can delete this DB, but node would not start. You need to do some extra steps: Delete corrupted DB Move all remained DBs to the other place Start the node, it should re-create databases Stop the node Move databases from backup and replace all databases Start the node.