Hey.. You are right...

See below

Thu Jul 18 11:36:49 2002
ARC1: Beginning to archive log# 2 seq# 230
Thu Jul 18 11:36:51 2002
Thread 1 advanced to log sequence 232
Current log# 1 seq# 232 mem# 0: D:\ORACLE\ORADATA\ORCL\REDO01.LOG
Thu Jul 18 11:36:51 2002
ARC0: Beginning to archive log# 2 seq# 230
ARC0: Failed to archive log# 2 seq# 230
ARC0: Beginning to archive log# 3 seq# 231
Thu Jul 18 11:36:51 2002
ARC1: Completed archiving log# 2 seq# 230
ARC1: Beginning to archive log# 3 seq# 231
ARC1: Failed to archive log# 3 seq# 231


ARC1 has started archiving before ARC0 (log# 2 seq# 230) so ARC0 fails..

later ARC0 starts archiving log# 3 seq# 231 before ARC1, then ARC1 fails to archive (log# 3 seq# 231)

Thanks.. But then why these processes doesn't know which log has already archived or in the process of getting ARChed by other archiver?

Thanks

Sameer