![]() ![]() ![]() ![]() If you then take two files, each containing one page and merge them as binary files, you will not be creating one two-page file, but instead one corrupt file that starts out with one page, then has a bunch of junk (the file header makes no sense when the program tries to read page two). The ability to detect corruption depends on the file-type.Īs an example, let’s invent a simplified PDF format: Byte(s) MeaningĦ-EOF Data (each page encoded separately)Īs you can see, each file will contain a file-level header with some general information, followed by data blocks for each page containing the page data. Some program will ignore the parts that don’t make sense and simply show what they can (which allows for stereography to work), but some will throw an error and complain that the file is corrupt. If you do a binary copy, you will simply be copying all the bytes as is which ends up putting these structures in places that they should not be, so when you open them, the parsing function will have trouble and see what is essentially corrupt data. You cannot simply copy the bytes from two binary files and expect them to work because binary files usually have headers, metadata, data structures, etc. You can merge text files with either the default text behavior or the binary switch, but pretty much any binary file will not work. The /b flag of the copy command treats the files as binary (i.e., a raw stream of meaningless bytes), and copies them byte for byte instead of the default (or the /a) behavior which treats them as lines of text (with end-of-line characters, end-of-files, etc.) ![]()
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