Re: [Re: [Re: [gentoo-dev] CD-RW devfs]]

[Viktor Lakics]

Thanks for the detailed answer.I recompiled the kernel tonight, and compiled
sr_mod in, now I can access my cdrom as 
/dev/sr0 (symlink to /dev/scsi....)

Everything is working now. Thanks again.

Viktor


Hendrik Visage <hvisage@×××××××××××.za> wrote:
> On Mon, Oct 22, 2001 at 12:36:04PM +0100, Viktor Lakics wrote:
> > Dear Hendrik,
> >
> > NOw I am confused. Do I need to have SCSI cdrom support in the kernel? I
only
> > have ide-scsi, scsi generic and ide-cd compiled as modules. I thought I
only
> > need SCSI cdrom support if I have a REAL scsi device...
> >
> > What is EXACTLY the minimum set of IDE and scsi option then what I need
> > in the kernel in ordrt to use my cdrw to write and to use it as a cdrom
as
> > well (meaning mounting CDs and reading them)?!
>
> For CD-RW usage (With stuff like cdrecord and friends), and accessing the
> CDROM, you'll need
> 1) sg or pg (sg for SCSI, and pg for parallel port) for the raw
communication
>  to the CD-RW that cdrecord needs. These are the "Generic" devices.
> 2) sr_mod or pcd (sr_mod for SCSI, pcd for parallel port)
>  as well as the "standard" cdrom etc. for acessing it as a CDROM device.
>
> sr_mod & sg is under the SCSI config in the kernel, while pg & pcd are
> somewhere under the parallel port stuff.
>
> However, you have a IDE CD-RW:
> Now the IDE (Actually ATAPI) CD-RWs are making use of a SCSI-over-IDE
> encapsulation. Thus the need for ide-scsi. You'll notice that when you
> install the Adaptec/Nero etc. software on Windows, that they also installs
a
> SCSI (aspi I think) layer for comms to the CDRW.
>
> Now the config at boot time:
>  hdc=ide-scsi (I guess, machine @home :()
>
> This tells the IDE/ATAPI layer to NOT initialize this drive in the IDE
> chain for things, but that it'll be handled as a SCSI device.
>
> Thus the need for modprobe ide-scsi to load the SCSI-over-IDE modules.
> Then you'll have to modprobe sg for cdrecord to work, and lastly
> modprobe sr_mod for this faked-SCSI CDROM (on the IDE/ATAPI bus).
>
> Hope this clears it, as I just wished the ATAPI/IDE/ATA standards died a
> silent/quiet/quick/horrific/long-forgotten death ages ago, so that we could
> all be using SCSI with it zillions of NICE(tm) features like
tag-command-queues
> etc. etc. etc.
>
> GReetz
> HEndrik
>
>
> >
> >
> > Appreciate you answer...
> >
> > Viktor
> >
> > Hendrik Visage <hvisage@×××××××××××.za> wrote:
> > > On Mon, Oct 22, 2001 at 07:04:32AM +0100, Viktor Lakics wrote:
> > > > Hi All,
> > > >
> > > > This is probably a user list question, I fighted it but I am running
out
> > of
> > > > ideas.  I
> > > > compiled IDE cdrom support as module, and ide-scsi as module in the
> > kernel. I
> > > >
> > > > have hdb=ide-scsi with grub.
> > > >
> > > > My modules are not loaded automatically, devfs is not generating
cdroms
> > nor
> > > > scsi
> > > > device (scsi dir is there, but empty).
> > > >
> > > > 1. How can I get module autoloading? (module.autoload does NOT work :
no 
> > > > matter what I put there. modules are not loaded). I do not have for
some
> > > > reason
> > > > modeles.conf in etc as well)
> > > >
> > > > 2. Even if I do modprobe ide-scsi, ide-cd, cdrom, although the
respective
> > >
> > > The order should be modprobe ide-scsi, sr_mod
> > > YOu HAVE compiled in SCSI CDROM support???
> > >
> > > > modules
> > > > are there, inserted, I cannot mount my cdrom. I could burn a CD,
because
> > the
> > > > scsi
> > > > generic driver is there (cdroms still not gnerated though), but when I
try
> > to
> > > > mount
> > > > a cd like:
> > > >
> > > > mount -t iso9660 /dev/sg0 /mnt/cdrom
> > > >
> > > > I get sg0 is not a block device.  Now /dev/scd0 is not there in devfs,
I
> > tried
> > > >
> > > > symlink as well, no success at all...
> > > >
> > > > Fresh rc6-9 tbz2 install...
> > > >
> > > >
> > > > Thanks for any ideas...
> > > >
> > > > Viktor
> > > >
> > > >
> > > >
> > > >
> > > > ----Viktor Lakics----
> > > >
> > > > Through the Internet:
> > > >
> > > >   lakicsv@×××.net
> > > >
> > > >
> > > > ____________________________________________________________________
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http://www.amexmail.com/?A=1
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> > >
> > > --
> > > ------------------------
> > > Hendrik Visage
> > > hvisage@×××××××××××.za
> > >
> > > _______________________________________________
> > > gentoo-dev mailing list
> > > gentoo-dev@××××××××××.org
> > > http://cvs.gentoo.org/mailman/listinfo/gentoo-dev
> >
> >
> > ----Viktor Lakics----
> >
> > Through the Internet:
> >
> >   lakicsv@×××.net
> >
> >
> > ____________________________________________________________________
> > Get free e-mail and a permanent address at http://www.amexmail.com/?A=1
> >
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>
> --
> ------------------------
> Hendrik Visage
> hvisage@×××××××××××.za
>
> _______________________________________________
> gentoo-dev mailing list
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----Viktor Lakics----

Through the Internet:

  lakicsv@×××.net


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