2 TB external HD does not mount any more. How to save it's data?

[Bas G. Roufs]

> Actually, it needs to be discarded - 
You mean: I need NOT to use it any more apart from an attempt to recover the data?

> with luck you will be able to get
> your data off it first. Next time this happens, start recovering the
> data as soon as the disk shows the first signs, however small, of
> impending failure.
> 
> You'll probably have to use something that can read the device directly
> - I suggest you take an image copy using something like dd (which can
> optionally ignore error) then work on the copy.

The above answer makes sense. The paragraph 'Imaging a damaged device, filesystem or drive' 
at help.ubuntu.com/community/DataRecovery points in the same direction. However, this brings 
up a next question: to what device can I copy an image of a failing external HD of 2 TB? From 
that device, 50% or 1 GB has been in use. My HD at the laptop is out of the question - that one is 
350 GB. So, I will need to buy another external HD to which I can copy the image. How big should 
that one need to be? 2 TB as well? Or better 3 TB? 





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