Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

With help from Christof and Hal I was able a while ago to burn exact 
copies of data CDs.  A quick summary.

1.  Install /ap1/cdutils.tgz which contains reaadcd and cdrecord and 
mkeisofs and documentation.

2.  Boot the bl2 kernel with loadlin appending to the line you boot with 
hdc=ide-scsi  (or substitute for hdc the CD-R drive you use).

3.  Insmod the following modules (copy them from the SW71 2.2.16/modules 
directory (misc or scsi?):
insmod ide-cd ignore=hdc  (substitute your drive for hdc)
insmod scsi-mod
insmod sg
insmod sr_mod
insmod loop
insmod ide-scsi

This last will tell you it detected a CD-ROM sr0 at scsi0.

These let you emulate a scsi drive with an ide drive because cdrecord was 
written for a scsi CD-ROM drive.  (We had one once).

4.  You can type cat /proc/scsi/scsi to be told what attached scsi devices 
you have with Channel:00 Id:00 Lun:00  (they may not be 00 if you have 
other scsi devices?).  Or cdrecord -scanbus will give similar info.

5.  To copy an entire CD first read it to a file:
readcd  dev=0,0,0 f=/tmp/filename.raw   (this creates the file of this 
name).

6.  To write this file to a CD:
cdrecord -v fs=6m speed=2 dev=0,0,0 filename.raw
Before actually burning a CD the first time run this with -dummy and
stop it before the 10 sec countdown 'last chance to quit'.  If you forget 
to stop it the next record won't work until you type cdrecord -reset.

Explanations:
-v  verbose, tells you what is happening as it records
- dummy trial runthrough with laser turned off
dev=0,0,0  - the first and only scsi device but if you have others change
speed = 2  (my recorder is an early one, change if you have faster;
the man page says if problems you can even try speed=0)
fs=6m  fifo (buffer?) 6 megabytes.  Default is 4.

Hal said in order to eliminate the need to write dev=0,0,0 for
the reader and writer to put into /etc/profile
export CDR_device=0,0,0

Can I also put in
export CDR_SPEED=2
export CDR_FIFOSIZE=6  (or just omit fs=6m to get default 4MB?)

That would leave me: cdrecord -v filename.raw

Instead of an entire CD it is possible to record single tracks (see the 
manual, something like track1...track2?).  Can someone explain further?

The man page lists many other switches.  -eject will eject the CD after
you are done recording.  -data is the default.

Question.  To record an audio CD (entire) rather than a data CD, if I am 
not doing individual tracks or .wav files, do I need the -audio switch or 
do I just record as above?  (i. e., is readcd just copying over a disk 
image to the filename.raw file, in which case all CDs should look the same 
to it).

I am at 498 of 650MB of a copy of the SW71 installation CD.

Christof suggests a script for the insmods.  Does it need any pauses in it 
like the plip script did?   I will call it cdr.


An easy way to copy CDs without backends:

Get and install the modules and cdutils.tgz
Put the export lines in /etc/profile for device, speed and fifosize

Then each time you want to write CDs:
bootcdr  (make a batch file to boot with  hdc=ide-scsi)
cdr (the insmod script, or if you will be writing lots of CDs put in rc.)
readcd f=/tmp/filename.raw   (first put CD to copy from into CD-R drive)
cdrecord -v filename.raw     (first put CD to record onto into the drive)

This is assuming you are copying from the same cdr device.  What would I 
change to copy from a CD-ROM drive at hdb?  I have a 40X CD-ROM drive
and the CD-R drive is only 24X.  Also it would save time when copying from 
several CDs to one not to be swapping back and forth.

mount /dev/hdb /cd
readcd dev=cd f=/tmp/filename.raw
    ???  I am not familiar with using scsi anything.
    I don't know why I did not need to mount the CD-R drive.

I have two nice Bach CDs I will copy as soon as I hear about -audio 
switch.  Only 35 min per copy at 2X, slightly faster than taping if you 
include the time to set this up.

Thanks again to Christof and Hal.  Sometime soon I will venture into linux 
scanner software.  Can't be any scarier than this was.


keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org