failover and huge data size in dataguard env

folks,

quote from oracle docs server.920/a96653/role_management.htm#1023666

"As a result of the failover operation, the original primary database can no longer participate in the Data Guard configuration, and all other standby databases are now receiving and applying redo data from the new primary database."

the above statement, because of RESETLOGS issue when failover data guard environment, which restart the SCN number back to 1. see
http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b14191/osrecov009.htm

does anyone have experience how to participating the original primary db which has been crashed prior to failover to the new data guard configuration?
I think about how to make SCN in the crashed original primary db's datafile to SCN 1, so the synchronization will match.

imagine, when we have TB in size, should we re-create standby database for participating in the new data guard configuration?

regards
Ujang
dba_at_indonesia

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