Relocating Online Redo Log Members

01. Shutdown database normal/immediate but not abort.
>shutdown immediate;

02. Copy the online redo log files to the new location.
Linux/Unix use mv command
Windows move command

03. Startup MOUNT database logging in as sysdba (do not open the database)
>startup mount pfile=<initialization parameter file with path>

04. Issue the following statement

Ex
You are changing the file from c:\oracle\oradata\redologs to c:\oracle\oradata\whs\redologs and like wise on d:\ drive.

ALTER DATABASE
RENAME FILE
'c:\oracle\oradata\redologs\redo_01_01.log',
'd:\oracle\oradata\redologs\redo_01_02.log'
TO
'c:\oracle\oradata\whs\redologs\redo_01_01.log',
'd:\oracle\oradata\whs\redologs\redo_01_02.log'
/

05. Open the database

>alter database open;