I have seen lower sequence logs complete archival after higher sequence
logs.  Usually coinciding with some sort of I/O bottleneck where multiple
archiver processes are competing for limited bandwidth.  I have not seen any
sort of log corruption as a result of that process though.  If the logs are
identical on both the primary and standby, (use diff to verify) I would
suggest doing another backup.  Because if that archived log is corrupt it
will put a keebosh on your restore.  If you used rman for your backup, I am
pretty sure you can verify that your archive logs will restore properly.  Of
course if you can't recover your standby it will have to be resynched as
well.

Steve

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Author: Steve McClure
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