I have a number of corrupt rollback segments and I'm not sure how to recover. I've tried to bring my rollback segments that are offline to online, however they don't change. What can I do to recover?

SEGMENT_NAME STATUS
------------------------------ ----------------
SYSTEM ONLINE
_SYSSMU1$ NEEDS RECOVERY
_SYSSMU2$ NEEDS RECOVERY
_SYSSMU3$ NEEDS RECOVERY
_SYSSMU4$ NEEDS RECOVERY
_SYSSMU5$ NEEDS RECOVERY
_SYSSMU6$ NEEDS RECOVERY
_SYSSMU7$ NEEDS RECOVERY
_SYSSMU8$ NEEDS RECOVERY
_SYSSMU9$ NEEDS RECOVERY
_SYSSMU10$ NEEDS RECOVERY
_SYSSMU11$ NEEDS RECOVERY
_SYSSMU12$ NEEDS RECOVERY
_SYSSMU13$ NEEDS RECOVERY
_SYSSMU14$ NEEDS RECOVERY
_SYSSMU15$ NEEDS RECOVERY
_SYSSMU16$ OFFLINE
_SYSSMU17$ OFFLINE
_SYSSMU18$ OFFLINE
_SYSSMU19$ OFFLINE
_SYSSMU20$ OFFLINE
_SYSSMU21$ OFFLINE
_SYSSMU22$ OFFLINE