Then I'd echo Andrew's suggestion for Carbon Copy Cloner from

This sort of image is useful particularly if you want to clone one disk to 
many other different computers.  As a static backup, however, your disk 
image will become out of date quickly.  If your only concern is one Mac, 
Apple's Time Machine software will also do a full disk backup, as well as 
incremental backups for as long as the software is on and you have the 
backup drive connected.


On Thu, 22 Sep 2011, Larry Kost wrote:

> I was trying to make an image of the entire drive.  My understanding is that 
> the image could be used to recover from a disk failure.  Mainly just trying 
> to figure out how to do this for future reference.
> On 9/22/2011 11:57 AM, Jonathan L. Trigaux wrote:
>> Are you trying to clone an entire disk/partition into an image, or trying 
>> to create an image of a group of files or subfolders?
>> -JLT
>> On Thu, 22 Sep 2011, Larry Kost wrote:
>>> I have a Macbook and have been trying to use the disk utility to make an 
>>> image on an external drive (Segate Freeagent GoFlex drive).  I have 
>>> upgraded to Lion.  When I try to create the image it seems to get through 
>>> most of the process until it gets to the step where it says "Adding 
>>> Resources".  It sits there for a long time (maybe 20 or 30 minutes) then 
>>> says "Unable to create LarryMac.dmg error  -192".
>>> Any ideas?  I looked on the web, but didn't find anything useful.
>>> LLK