Alvin, if you are running on either HP, SUN, or AIX platforms, then I
would recommend you use DataTools SQL-Backtrack, because they provide a
true incremental backup.  Your method seems to be more work on your part
and what you are really doing is a "simulated" incremental backup.  You are
backing up the log files, and then if you need to restore you would reapply
each transaction in the logs.  A true incremental backup only backs up
the changed DB blocks (I think it's at the block level?).  My lead contact
at DataTools is Randy Hellmonds, randyh AT datatools DOT com.
thanks,
Cyndie Behrens
IBM - San Jose
408-927-3627