Re: Putting It All On a Stick
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On Thu, Dec 31, 2015 at 11:55:08AM -0500, Steve Matzura wrote:
> Fascinating stuff. The one thing I forgot is cp and dd are not the
> same.
Well... if you cp the image to the _device file_ it amounts practically
to dd (but in dd you can set the block size and block count; I once
experimented with block size dd'ing to an USB stick and seem to remember
that there was a (speed-wise) "sweet spot" around 16K, but don't ask
me whether this was inherent in the USB stick or depended on whatever
other system parameters and planet alignments out there).
Cat is also good. Again, to the device file.
Make sure the "USB stick is not mounted" (in all three cases). Sometimes,
overly helpful systems will mount the thing as soon as you insert it [2].
Unmount it before.
Now when you cp the image file to the "mounted USB stick" [1] the result
will be much different and most probably not the desired one.
[1] Yeah, I know I'm fuzzing it. Precisely that would mean "cp the image
file to a mounted file system which resides in the USB stick (phew)"
[2] As long as there is a recognizable file system on it (see [1]).
Otherwise the helpful system might react somewhat confused.
Regards
- -- tomás
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