[Novalug] rsync question

[Megan Larko]

Happy May to you!

I think that I am mis-understanding my reading of the "man rsync" documentation.

I have two disks, one of which is from a remote location that has been "sneaker-netted" to my 
system.  The objective is to reconcile the local disk to include files picked up by the disk at its 
remote location (The remote box is an ftp script box which gets data as a backup to our main ftp 
box.   The main box had new hardware put in and was down for two days.   We want to obtain the data 
no longer on the ftp site  from our remote ftp box to the main/primary box.)

I mounted the "sneaker-netted" disk to our primary system.  The question I am asking is "What files 
exist on SRC but not on DEST?"

 From "man rsycn" I came up with "rsync -an -e --ignore-existing /megtmp/DATA/  /DISK1/DATA/"
I directed the output to a file.  My understanding is that -a is "archive" -n is "dry-run"---don't 
actually move any data and -e --ignore-existing is to 'ignore files that already exist on the receiver'.

The output in my file seemed to be files in-common.
[larkoc at crew 200704]$ ls -l /megtmp/DATA/TRMM/3B4xRT/200704/3B42RT.2007041606.bin
-rw-r--r--  1 1000 users 3458880 Apr 17 07:24 /megtmp/DATA/TRMM/3B4xRT/200704/3B42RT.2007041606.bin
[larkoc at crew 200704]$ ls -l /DISK1/DATA/TRMM/3B4xRT/200704/3B42RT.2007041606.bin
-rw-r--r--  1 larkoc larkoc 3458880 Apr 18 07:24 DISK1/DATA/TRMM/3B4xRT/200704/3B42RT.2007041606.bin

[larkoc at crew 200704]$ ls -l /megtmp/DATA/NRL/6-hour/200704/200704160000.6.pmw
-rw-r--r--  1 1000 newspi 1382400 Apr 16 04:32 /megtmp/DATA/NRL/6-hour/200704/200704160000.6.pmw
[larkoc at crew 200704]$ ls -l /DISK1/DATA/NRL/6-hour/200704/200704160000.6.pmw
-rw-rw-r--  1 larkoc larkoc 1382400 Apr 16 04:31 /DISK1/DATA/NRL/6-hour/200704/200704160000.6.pmw

How should I craft my command to get files that exist only on /megtmp/DATA/ but that do not exist on 
  /DISK1/DATA/?

Thanks!
megan