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  • From: sindi keesan <keesan AT sdf.lonestar.org>
  • To: cce.zizkov AT volny.cz, baslinux AT lists.ibiblio.org
  • Subject: Re: [BL] CD burning with 2.4.31 kernel
  • Date: Fri, 12 Jan 2007 19:46:20 +0000 (UTC)

On Fri, 12 Jan 2007, Christof Lange wrote:

a) I inserted the modules necessary for CD-burning. cdrecord
recognized the CD drive. Then I tried to insert the modules
for USB storage support - they failed to load.

One of the modules is the same for both - scsi_mod. So you cannot insert it twice. Which particular USB-storage module refused to load - scsi_mod itself, or sd_mod, or the three usb modules?

b) I inserted the modules for USB storage - success. Then I added
the modules for CD burning - success. But the device address
of the CD burner is not as it used to be 0,0,0 bus has been shifted
according to the number of USB devices that had been plugged in
before.

USB storage devices are scsi devices, that is why you insmod scsi_mod and sd_mod before usb-storage. If you need to insert the USB modules first, they will get the first SCSI address (0,0,0).

In the second constellation I succeeded for the first time in burning
the contents of a flash memory stick directly to a CD. The change of
the device address can probably be detected within a script, as
'cdrecord -scanbus' gives a survey of the current SCSI devices.

This comes already very close to what I primarily intended (only
the mounting of CD-ROM is still missing). But I think, I will have
to do some more testing, and then try this with my 8MB RAM disk.

What I would like to understand is, why test a) failed, eg. why I
have to load the USB modules before doing the scsi emulation for
the CD drive.


Christof

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




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