I am trying to migrate data using fs_copy. I would like to do an initial full copy and then an incremental. Looking at fs_copy and celerra replicator documentation i've followed the following steps, but yet my incremental copy takes just as long as my initial copy. Here are my steps:

1) create first checkpoint of source file system

fs_ckpt fs46 -name fs46_ckpt1 ¿Create

2) copy first checkpoint to destination file system

fs_copy -start fs46_ckpt1 fs52 -option convert=no

then i copy a 30mb file to my source file system

3) create second checkpoint of source file system

fs_ckpt fs46 -name fs46_ckpt2 ¿Create

4) copy incremental changes between fs46_ckpt1 and fs46_ckpt2 checkpoints
to destination file system.

fs_copy -start fs46_ckpt2 fs52 -fromfs fs46_ckpt1

Here this is where i am having an issue ..this incremental processs should only copy the 30mb that changed between the snapshots ..but it seems as it's doing a full copy again because the time it takes to complete this operation is the same as the initial copy. When i mount the file system i do see that 30mb file that was captured with the second snapshot. What am i missing ?

Thanks