Redo logs status - Invalid

I have added new members to my redo log groups. However, when checking the redo log members' status, all the new members have a status of "Invalid" even after restarting the database.
I have checked that the physical files of the new members are created properly in the directory which is owned by the dba account. The rights are all correct.
Now, I am unable to drop these new redo log members and am at a loss of how to change the status to "Stale" or "Inactive".
Please advise.
Thank you.
Regards,
Dara.

Thanks, guys! It works after performing a log switch.
BTW, I have an error which I am not sure if by adding new members work or is the member really corrupted. Please advise.
The error is :
ORA-00313: open failed for members of log group 1 of thread 1
Thank you.
Regards,
Dara.

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    Handle:     919131  
    Status Level:     Newbie
    Registered:     Mar 6, 2012
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    Total Questions:     8 (8 unresolved)
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    Then issue manual log switch. Alter system switch logfile
    I got disconnected from database & database was close.
    When I reconnected & try to open database in normal mode. Gave error saying redolog_1.log is corrupted & needed for recovery.
    Now not even allowing me clear redo group 1. with alter database clear logfile group 1. as database is not coming to open stage.
    just able to mount the database. with error rdolog_1 corrupted.
    Wasn't oracle suppose to be halted when very 1st time I corrupted redo log file.
    Why it disconnected me & got close.
    When then one use alter database clear logfile group 1.

    I may try this ALTER DATABASE OPEN RESETLOGS;
    As no backup & not multiplex.
    Still looking for explanation why database got close down instead of getting halt.
    I have found one more status in V$log, which is not given in Oracle university book or online document.
    INVALIDATED
    Which come as a result when oracle unable to switch to next on line group due to non availability of next group redo log physical file.
    SQL> select group#,members,status from V$log;
    GROUP# MEMBERS STATUS
    1 1 INVALIDATED
    2 1 INACTIVE
    4 1 UNUSED
    As matter of fact, it's only portion of a big
    document which happen to cover what you are testing
    in detail.
    I would invest time to read the document to
    understand how things work instead of getting dirty
    quick answers.

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