[CentOS] Using cdrecord on CentOS

Robert Heller heller at deepsoft.com
Wed Apr 15 18:00:44 UTC 2009

At Wed, 15 Apr 2009 18:22:28 +0200 CentOS mailing list <centos at centos.org> wrote:

> Robert Heller a écrit :
> > 
> > An audio CD is not like a data CD.  It does not have a 'file system'. 
> > It is a collection of data tracks, containing cdda files.
> > 
> Yeah, I know. But then, AFAIK, dd is supposed to handle these "binary 
> sausages" as well. Meaning: take that input (whatever it is) and produce 
> output without asking what it is.
> Correct me if I'm wrong.

Assumes that the device in question behaves (or can behave) as a raw
sequencental block device.  Audio CDs are not, strictly speaking, like
a partitioned (or partitionable) hard drive.  CD-Rom 'tracks' are NOT
like disk partitions. ReadCD and Cdda2wav don't just to raw read()
calls (which is pretty much all dd does).  They do some interesting
ioctl() calls specific to CD-Roms as well -- these I/O calls relate to
'seeking' to the proper track and figuring out big the track is, etc. 

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Robert Heller             -- 978-544-6933
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