Instructions for
   Making an IMAC GUID formatted drive
    Read/Writable on graphics3,

ON the IMAC >>>>>>>>>

plug drive into a USB port
Open "Disk Utility" and find your Partition of interest
  assume there are 2 partitions: Untitled_1 and Untitled_2
   and you want your data on "Untitled_1"

------------------
Open a Terminal window and make sure they're mounted:
$> df -h
  ... blah ...
  ... bhah ...
  /dev/disk1s2   932Gi  633Mi  931Gi     1%   162010 244076009    0%   /Volumes/Untitled_1
  /dev/disk1s3   931Gi  633Mi  930Gi     1%   162004 243861873    0%   /Volumes/Untitled_2 

------------------
Check that /Volumes/Untitled_1 is Read/Writable by everyone:

$> ls -la /Volumes/Untitled_1/
   ..blah..
   ..blah ..
  drwxrwxr-x  7 admin  staff  306 Sep  1 09:59 .
   ..blah ..

NOTE:   "drwxrwxr-x" 
     means that it is NOT WRITABLE by everyone

------------------
     to make it writable by everyone do this:
$> chmod  777   /Volumes/Untitled_1

------------------
Check Writablity again:
$> ls -la /Volumes/Untitled_1/

... and note that it is now
  "drwxrwxrwx  7 admin  staff  306 Sep  1 09:59 . "

------------------
OK, now go back to the "Disk Utility" window

CLICK on (select) the partition of interest (Untitled_1) from the list of 
       drives and partitions along the left side of the window
Press and HOLD down the "alt option" key on the keyboard and 
Click on "File" from the Menu Bar at the top of the screen
Select "Disable Journaling" (this will be grayed-out if you don't have the "alt option" key pressed)
When that's done, after the timer stops spinning, Eject the disk in"Disk Utilities"
Unplug the Drive from the IMac USB port
------------------
<<<<<<<

ON graphics3 >>>>>>

Plug the drive into a USB port; after a few seconds/momemnts; it should mount automatically
  as /media/Untitled_1/
Then to this:

$> df -h
   to see if has mounted

------------------
If you find it, then you probably want to make a new directory, i.e."

$> mkdir /media/Untitled_1/date_today/

------------------
to copy everything in
            "/data/username/date_today/"
   into  "/media/Untitled_1/date_today/" 

   Do This:
$> rsync_usb.com /data/username/date_today/ /media/Untitled_1/date_today/ 

------------------
"rsync_usb.com" will run continuosly, waiting for new data to arrive, until you <CNRTL> c 

The Drive will then be unmounted and you can then safely UNPLUG it from graphics3.

(If you want to mount it on graphics3 again, just unplug it and plug it back in, or try
$> mount /media/Untitled_1/

<<<<<<<

---      IMPORTANT:!!!

Back on the IMAC >>>>>>>>>

plug drive into a USB port
Open "Disk Utility" then
CLICK on (select) the partition of interest (Untitled_1) from the list of 
       drives and partitions along the left side of the "Disk Utility" window
Press and HOLD down the "alt option" key on the keyboard and 
Click on "File" from the Menu Bar at the top of the screen
Select "Enable Journaling"
When that's done, after the timer wheel stops spinning, 
  you can Eject the disk in"Disk Utilities"
      and Unplug the Drive from the IMac USB port
  -OR- open it in the "finder" to see your files 

<<<<<<<