CD drive can read commercial cds, can boot from them, can play audio cds
& can play dvds.  However, it cannot mount burned cds, i.e., a cd-r. 
I've tried to mount cd-rs burned on different machines, but none will
mount on this IBM T30.  The cd-r is just not recognized as containing
any data.  They do mount on another Linux machine.  Is this a software
or hardware problem?  Anyone ever experience this?

On Sun, 03 Sep 2006 12:25:46 -0400, edj wrote:

> CD drive can read commercial cds, can boot from them, can play audio cds
> & can play dvds.  However, it cannot mount burned cds, i.e., a cd-r. 
> I've tried to mount cd-rs burned on different machines, but none will
> mount on this IBM T30.  The cd-r is just not recognized as containing
> any data.  They do mount on another Linux machine.  Is this a software
> or hardware problem?  Anyone ever experience this?
>
This is a puzzle, especially since you say the drive is compatible with
both CDs and DVDs.  To me, that means the optical drive in the T-30
is of a generation which should be compatible with CD-R by default.

The final puzzling element is that you can mount the same discs on another
system without trouble. Truly puzzling.

What command do you use to mount? You could try this directly:

# mount -t iso9660 -o ro /dev/hdc /mnt/cdrom

-- 
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edj writes:

> CD drive can read commercial cds, can boot from them, can play audio cds
> & can play dvds.  However, it cannot mount burned cds, i.e., a cd-r. 
> I've tried to mount cd-rs burned on different machines, but none will
> mount on this IBM T30.  The cd-r is just not recognized as containing
> any data.  They do mount on another Linux machine.  Is this a software
> or hardware problem?  Anyone ever experience this?

This kind of nonsense used to happen in the early days of CD-Rs, but it's 
rare to see this happen in this day and age.

Try to burn the CD-Rs at a lower rate, and use a brand of CD-Rs rated for 
lower burn speeds.  That might improve compatibility.


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edj <edjlb@yahoo.com>:
>  CD drive can read commercial cds, can boot from them, can play audio cds
>  & can play dvds.  However, it cannot mount burned cds, i.e., a cd-r. 
>  I've tried to mount cd-rs burned on different machines, but none will
>  mount on this IBM T30.  The cd-r is just not recognized as containing
>  any data.  They do mount on another Linux machine.  Is this a software
>  or hardware problem?  Anyone ever experience this?

I've found CDs are a lot like floppies.  Dependent on the quality of
the media, the quality of the drives, the speed at which they were
burned, and the software used to burn them, making one burned on one
machine readable by another can be a crap shoot.

Try burning it at the slowest speed the burner supports:

   cdrecord speed=4 dev=/dev/hdd -eject -tao -data /scratch/iso/track_01.img


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