Can vote. Arbiters do not replicate data and exist solely to participate in elections.
Cannot vote. Is not accessible to the set.
Cannot vote. Has encountered an unrecoverable error.
Can vote. The primary is the only member to accept write operations.
Can vote. Members either perform startup self-checks, or transition from completing a rollback or resync.
Can vote. Performs a rollback.
Can vote. The secondary replicates the data store.
Cannot vote. All members start up in this state. The mongod parses the replica set configuration document while in STARTUP.
Cannot vote. Forks replication and election threads before becoming a secondary.
Cannot vote. Has never connected to the replica set.