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Subject: Re: [PATCH] adding two new options to 'cp'
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Peter Jeremy wrote:

> Note that it isn's possible to accurately distinguish between a block
> of NULs and a hole in the file through the filesystem.  The only way
> to accurately copy a sparse file is with dump/restore.

Hence the need for an explicit switch.

> This is true in the desktop and server market but is not true in the
> embedded market and only marginally true for laptops.

I don't know about embedded markets (do they need cp, or it's simply 
kernel+dedicated application?) but I've recently bought a 60GB laptop 
drive for ~~ $120 (converted back from my currency, may be cheaper in 
other parts of the world) - that's $2/GB.