Need help on recovery

Hello All,
We have a datagurad implmentated system. Yesterday due to some reasons Primary server crashed( it will take 1 or 2 day get back the server with filesystem) .
Now we have secondary system at diffrent location which is still up and running.
I want to understand following
Now secondary location is having last archive log file applied. but my Primary DB is having 200MB of redolog buffer.
1)what will happen if I will start the seconday DB? Is 200MB of data will be lost ?
2) Apart from log switch how archive log file will get generated ?
3) what is best solution to recover data up maximum level ?
Thanks & Regards,
Ajay Bhivsankar.

Ajay,
(A) What dataguard mode are you using?
(B) What log_archive_dest_n options did you specify on the primary?
(C) Are you using standby redologs on the standby?
(D) What is your version and platform?
If for (B) you were using LGWR, and for (C) you are using standby redologs, you probably have all the redo you can get in files on the standby. If for (B) you were using ARCH, then you are probably missing the most recent redo entries since the last log switch. If that is the case and you can't get the most recent redolog from the primary to copy, then you have lost data.
The log buffer is not particularly relevant to your concern, since it is almost always nearly empty. See the documentation below for the reasons:
[http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/process.htm#sthref1530|http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/process.htm#sthref1530]
Regards,
Jeremiah Wilton
Blue Gecko, Inc.
[http://www.bluegecko.net|http://www.bluegecko.net]

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