Chained vs. migrated rows - Any easy way to tell the difference?

We have two databases that are showing very high number of table fetch continued row in v$sysstat each day and before doing a move or export/import or copying the rows off and reinserting them I was hoping to find out if I'd really gain anything.

All I found in the Oracle docs was the suggestion to assume they're migrated and if the fix doesn't work then that means they were really chained ( Note:122020.1).

I'm considering using length() on all the columns and adding them together to find any rows that wouldn't fit in a block but was wondering if there was an easier way. Besides, one of the tables (third party app) has a long raw column so there's no easy way to get the column length there.

Thanks,
Jay Miller

--
http://www.freelists.org/webpage/oracle-l