[ale] dd /dev/cdrom queryosity

[aaron]

On Sunday 09 May 2004 00:33, Chris Fowler wrote:
> The error is okay.  I would add the block size of 2048 to the command.  
> 
> The dd command has no way of knowing how big the ISO image is.  It just
> read until it falls off the end and then displays an error.  So replace
> "Input/Output error" with "Reached end of media"

Thanks! That explains it well! Helpful to get a couple second opinions that 
the "error" can be safely ignored.

Also good to learn the block size for CD's, since I'd been assuming it was 
1024. Just for grins I tried the bs=2048 control with a dd rip, but it still 
reports "Reached End of Media" error.

appreciated
peace
aaron






 

 
> 
> On Sat, 2004-05-08 at 13:15, aaron wrote:
> > I'm ripping some distro CD's to burn copies, eg:
> > 
> >        dd  if=/dev/cdrom  of=/mydir/distro1x4.iso
> > 
> > The CD's seem to be reading fine and the ISO's are getting generated, but 
dd 
> > is reporting an exit error after completing process:
> > 
> >       dd: reading `/dev/cdrom': Input/output error
> > 
> > The first test burn from one of the generated ISO's still seemed to come 
out 
> > OK. The byte counts of the duplicate CD match the original, and the new CD 
> > boots up without problems. 
> > 
> > According to a couple HOWTO pages, the dd command line is correct and no 
other 
> > flags or options are suggested.  I just don't recall seeing this error 
noted 
> > in the past, though I'm not sure if I've done any data rips with this 
> > particular CD writer, which is a fairly recent upgrade. Tried un-mounting 
the 
> > cdrom before running dd but still saw the error.
> > 
> > Mostly a queryosity since the ripped ISO's and resultant CD's seem to be 
fine, 
> > but any guesses as to WHY I am seeing this error?
> > 
> > thanks
> > peace
> > aaron
> > 
> > 
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>