CD-writer hint

Adam Ottley aottley at home.com
Sun Oct 7 20:53:13 PDT 2001


Here's a new hint I've written about setting up a CD burner.  It covers the 
necessary kernel configuration, permissions needed to burn, and compiling the 
cdrtools and cdrdao packages.
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TITLE:		CD-writer configuration
LFS VERSION:	Any
AUTHOR:		Adam Ottley <aottley at home.com>

SYNOPSIS:
	This hints covers the task of configuring the Linux kernel for a CD-writer 
plus the installation of the cdrtools and cdrdao software packages.

HINT:

Software you'll need:

  cdrtools-1.10.tar.gz  (ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/)
  cdrdao-1.1.5.tar.gz  (http://sourceforge.net/projects/cdrdao/)
  pccts133mr.tar.gz  (http://www.polhode.com/pccts.html)


-------------------------------------

CONFIGURING THE KERNEL

CD-writing software communicates on a SCSI interface, even if it's to an IDE 
CD-writer.  Here's what options you'll need enabled/disabled in your kernel:

SCSI CD-writer:

<SCSI support menu>
  SCSI support:  Y or M
  SCSI CD-ROM support:  Y or M
  SCSI generic support:  Y or M
  Vendor-specific extensions:  Y
Also include the low-level driver for your SCSI card if applicable.


IDE CD-writer:

<ATA/IDE/MFM/RLL support menu>
  IDE/ATAPI CDROM support:  N
  SCSI emulation support:  Y or M
<SCSI support menu>
  SCSI support:  Y or M
  SCSI CD-ROM support:  Y or M
  SCSI generic support:  Y or M
  Vendor-specific extensions:  Y

Having the loopback device can also be useful for mounting ISO files from the 
hard drive.  To do that, use this command:

  mount -t iso9660 -o loop <iso file> <mount point>

Build the new kernel and install it.  You may have to alter a few 
symlinks or your fstab to reflect the new location of your CD/DVD drives - 
they'll be located at /dev/scd# now.  Once you're convinced that your new 
kernel works, move on to the next section.


-------------------------------------


cdrtools 1.10

cdrtools includes many programs including cdrecord, mkisofs and cdda2wav.  It 
is the premier suite of burning tools for Unix, especially for data CDs.

First you'll need to edit the DEFAULTS/Defaults.linux file to change the 
installation path and the user/group to which the binaries will be assigned.  
Change each occurrance of /opt/schily to your preferred path, i.e. /usr/local. 
By default, the binaries are assigned to the user and group "bin".  For 
convention's sake, we'll just change both to root by editing the DEFINSUSR and 
DEFINSGRP entries.  Once that's finished, go back to the top-level cdrtools 
directory and run:

  make COPTS=$CFLAGS &&
  make install

to build and install cdrtools.  The COPTS=$CFLAGS is optional, only used if 
you want optimization (which probably only makes a difference with mkisofs).

With cdrtools now installed, you can check the SCSI interface for your 
CD-writer.  To do that, issue this command as root:

  cdrecord -scanbus

Here's a sample output from this command:

Linux sg driver version: 3.1.17
Using libscg version 'schily-0.5'
scsibus0:
        0,0,0     0) 'CREATIVE' 'DVD5240E-1      ' '1.30' Removable CD-ROM
        0,1,0     1) 'HP      ' 'CD-Writer+ 9100b' '1.07' Removable CD-ROM
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *

You'll need the three-number ID of each of your drives if you want to read 
and burn from the command line using cdrtools and cdrdao.


-------------------------------------


pccts 1.33

pccts is a parser generator that is required by cdrdao.  Both the binaries and 
the headers must be installed manually.

To build and install pccts, run these commands:

  make &&
  cp bin/antlr bin/dlg bin/genmk bin/sor /usr/local/bin &&
  cp -a h/ /usr/local/include/pccts


-------------------------------------


cdrdao 1.1.5

cdrdao is a tool that specializes in disc-at-once audio CD burning.  It also 
supports bin/cue burning, custom tables of contents, and CDDB lookup for 
automatic CD-TEXT insertion.

Build and install cdrdao with the following commands:

  ./configure --prefix=/usr/local &&
  make &&
  make install


-------------------------------------


PERMISSIONS

Anyone who needs to rip or burn CDs needs to be configured for the proper 
permissions.  Specifically, read and write permissions are needed on the SCSI 
generic device (/dev/sg*) for each drive, and read permission is needed for 
the /dev/scd device for each drive.

The optimal way to do this is create a group called cdwriter, add the 
necessary people to that group, assign the devices to group cdwriter, and 
change the permissions to 660 on the /dev/sg devices and 640 on the /dev/scd 
devices.  Note that you need to do this for CD readers as well in order to rip 
CDs.


-------------------------------------


Now that the kernel is configured, the software is installed and the 
permissions are set, you're done!  Try burning an ISO or two or grab a GUI 
frontend for the burning programs.  Happy burning!




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