[CentOS] DVD writer problem

Bryan J. Smith b.j.smith at ieee.org
Sat Jun 4 16:15:41 UTC 2005


On Sat, 2005-06-04 at 09:13 -0400, Lamar Owen wrote:
> Also, you would be better off using readcd instead of dd; dd is fairly
> dumb about error handling, but readcd knows how to deal with it.

Ditto.  One thing non-Linux users also didn't know is that the way "dd"
works on Linux is pretty much Linux-only (not sure about BSD).

I.e., a "true" dd of a CD/DVD media would yank in _all bits.  On Linux,
when you run a dd on a CD/DVD media, it looks for the first ISO9660
Yellow Book (data) track and yanks that, and not the entire disc.

What we call an ISO9660 (.iso) image is really a single track in ISO9660
Yellow Book format when it goes on the CD.  While Linux hides this fact,
when you dd on many other platforms, you're going to get _additional_
bits before and after.  ;->


-- 
Bryan J. Smith                                     b.j.smith at ieee.org 
--------------------------------------------------------------------- 
It is mathematically impossible for someone who makes more than you
to be anything but richer than you.  Any tax rate that penalizes them
will also penalize you similarly (to those below you, and then below
them).  Linear algebra, let alone differential calculus or even ele-
mentary concepts of limits, is mutually exclusive with US journalism.
So forget even attempting to explain how tax cuts work.  ;->





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