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Why every OS still can't resume file transferring? [closed]

Why every OS still can't resume file transferring? [closed]

I mean, Windows 7, Ubuntu 9.10 and Snow Leopard... All newest and top of line desktop operating system still use regular copy to transfer files, as it seems to me from experience.

Asked by: Guest | Views: 32
Total answers/comments: 1
Guest [Entry]

"If you are transferring large files over an unreliable network, use rsync with the --partial option. Your use case is rather rare. The share on one system I use has a transfer that takes over a day, with no threat of lost data due to an incomplete transfer (it is slow for some reason to look into, sometime).

Edit:
@Cawas: the more common use case is copying over a file with a new version of the file. If a file has been modified (made bigger in this case), trying to append the extra length of the new file to the old file will result in a corrupt file. Protocols like rsync and ftp can assume you are not doing this."