If i issue the alter system archive log current this will archive the current redolog of the orcl1 right !!!Wrong - alter system archive log current won't just archive the redolog of orcl1.
hope you are clear on issue i am facing the redo log files of thread 2 were physically deleted accidentally before few days!!!I'm very clear on the issue you are facing.....thanks for asking.
Are you still facing the issue?
This is my understanding of your problem.
You would like to remove logfiles of group 5 and 6 from thread 2 of 3 node rac setup?
Please provide the current status from v$log;
As per the above conversation try this and ensure the status in v$log is in inactive
alter system archive log current; That's when you can drop a lgofile. Also create a logfile2(2 for an instance) before dropping 5 and 6.