6 Mar
2013
6 Mar
'13
8:34 a.m.
On Wed, Mar 6, 2013 at 8:01 AM, Jonathan Katz <jon at jonworld.com> wrote:
On Mar 6, 2013, at 10:49 AM, Glen Slick <glen.slick
at gmail.com> wrote:
I would say that it "changes" the file blocking if the blocking
structure of the files on the tape is completely removed as the files
are read from the tape and written to disk. If the end result is a
set of plain files on disk how do you know what the blocks sizes were
when then files were originally written on the tape?
In some cases you want to preserve the exact
blocking structure of the
tape, not just the set of files. I don't know if you can do that using dd
or tar.
dd doesn't change blocking, it's just a byte-by-byte dump, unless you specify
otherwise. Tar, on the other hand, looks for files.