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.
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