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Hello,

I'm trying to install RHEL4.3 (CentOS to be exact) from an external USB
DVD drive. The CD boots fine, I choose 'Local CDROM' as the
installation source, load 'usb-storage' successfully. However, after
this, I get told that the system was not found in any of my CDROMs.

Any idea what the problem might be?

Perhaps some options for the usb-storage driver are necessary to make
it appear like I have a regular CD drive? Or boot options like `linux
cdrom=scsi_something' ?

Thanks in advance

n.torrey.pines@gmail.com wrote:
> Hello,
>
> I'm trying to install RHEL4.3 (CentOS to be exact) from an external USB
> DVD drive. The CD boots fine, I choose 'Local CDROM' as the
> installation source, load 'usb-storage' successfully. However, after
> this, I get told that the system was not found in any of my CDROMs.
>
> Any idea what the problem might be?

This just a guess, but since USB hard disks appear to the kernel as SCSI
ones I would expect that USB DVD drives will also appear as SCSI ones.
So after loading usb-storage, make sure you load sr_mod (the SCSI CD/DVD
driver). Then you you should find your DVD at /dev/sr0 or /dev/scd0.
(Both names normally refer to the same device.)

John-Paul Stewart wrote:
> n.torrey.pines@gmail.com wrote:
> > Hello,
> >
> > I'm trying to install RHEL4.3 (CentOS to be exact) from an external USB
> > DVD drive. The CD boots fine, I choose 'Local CDROM' as the
> > installation source, load 'usb-storage' successfully. However, after
> > this, I get told that the system was not found in any of my CDROMs.
> >
> > Any idea what the problem might be?
>
> This just a guess, but since USB hard disks appear to the kernel as SCSI
> ones I would expect that USB DVD drives will also appear as SCSI ones.
> So after loading usb-storage, make sure you load sr_mod (the SCSI CD/DVD
> driver). Then you you should find your DVD at /dev/sr0 or /dev/scd0.
> (Both names normally refer to the same device.)

RHEL4.3 installer doesn't give me a command line, as far as I know, so
I can not load arbitrary modules, unless its ncurses-looking GUI allows
me to do it.

However, you are right, after loading usb-storage, scd0 pops up, but
unfortunately, not where I could use it:

In the beginning, the installer asks me whether I want to install from
a 'Local CDROM' or a 'Hard drive'. If I choose the former, I can load
usb-storage (But it can't find RH/CentOS on any of my CDs)

Then if I go back and pick 'Hard drive' instead, it gives me a choice
of /dev/hda1 or /dev/hda2. I'm asked to press F2 if my disk drive is
not listed. If I do that, it gives me a list of
scd0 or hda to choose as a source for a DRIVER DISK (I don't need a
driver: if I pick scd0, the installer tells me there are no drivers
there)

So the situation is pretty silly: I have scd0, it shows up in some
menues, but I can't tell the installer to just continue the
installation from there.

Thanks

Le Mon, 28 Aug 2006 22:49:04 -0700, n.torrey.pines a écrit*:

> Hello,
>
> I'm trying to install RHEL4.3 (CentOS to be exact) from an external USB
> DVD drive. The CD boots fine, I choose 'Local CDROM' as the
> installation source, load 'usb-storage' successfully. However, after
> this, I get told that the system was not found in any of my CDROMs.
>
> Any idea what the problem might be?
>
> Perhaps some options for the usb-storage driver are necessary to make
> it appear like I have a regular CD drive? Or boot options like `linux
> cdrom=scsi_something' ?
>
> Thanks in advance


From the release notes... Hope it can helps

Regards,

JYL


Installation of Red Hat Enterprise Linux 4 Update 3 is known to have an issue with USB peripherals on IBM® BladeCenter® HS20-8832 systems.

To avoid this issue, you must perform either of two actions:

*

Install Red Hat Enterprise Linux 4 Update 3 for AMD64 and Intel® EM64T platforms
*

If you are installing Red Hat Enterprise Linux 4 Update 3 for the
x86 architecture, you must first move the USB IRQ from line #7 to
another available IRQ line. This will prevent stray interrupts from
disrupting the USB device and the installation of the OS. Consult
your hardware vendor for more information about changing IRQ lines
in your system.

LENHOF Jean-Yves wrote:
> Le Mon, 28 Aug 2006 22:49:04 -0700, n.torrey.pines a écrit :
>
> > Hello,
> >
> > I'm trying to install RHEL4.3 (CentOS to be exact) from an external USB
> > DVD drive. The CD boots fine, I choose 'Local CDROM' as the
> > installation source, load 'usb-storage' successfully. However, after
> > this, I get told that the system was not found in any of my CDROMs.
> >
> > Any idea what the problem might be?
> >
> > Perhaps some options for the usb-storage driver are necessary to make
> > it appear like I have a regular CD drive? Or boot options like `linux
> > cdrom=scsi_something' ?
> >
> > Thanks in advance
>
>
> From the release notes... Hope it can helps
>
> Regards,
>
> JYL
>
>
> Installation of Red Hat Enterprise Linux 4 Update 3 is known to have an issue with USB peripherals on IBM® BladeCenter® HS20-8832 systems.
>
> To avoid this issue, you must perform either of two actions:
>
> *
>
> Install Red Hat Enterprise Linux 4 Update 3 for AMD64 and Intel® EM64T platforms
> *
>
> If you are installing Red Hat Enterprise Linux 4 Update 3 for the
> x86 architecture, you must first move the USB IRQ from line #7 to
> another available IRQ line. This will prevent stray interrupts from
> disrupting the USB device and the installation of the OS. Consult
> your hardware vendor for more information about changing IRQ lines
> in your system.

Unfortunately, I have a laptop, and not a BladeCenter, although it's
also IBM.