Re: ide-scsi emulation fails due to missing module sr_mod in kernel 2.4.18-bf2.4
Michael Rauch wrote:
i recently replaced the SuSE installation on my desktop with
debian/woody. now i have some troubles getting my IDE cd-burner (alias
hdd) working. after reading the CD-WRITING-HOWTO and googling around for
some time i figured that the module sr_mod (afaik SCSI CD-ROM support)
is not present in my system, i'm using the prebuilt 2.4.18-bf2.4 kernel
and sr_mod.o is missing from
/lib/modules/2.4.18-bf2.4/kernel/drivers/scsi where i would expect it to
now i'm wondering if there is some other way to get this module on my
system beside of getting the kernel and module sources and baking a new
I just had to go through this here, so I had better reply while it is
"fresh" in my rather ancient mind! <grin>.
The 2.4.18-bf2.4 kernel is a "special" kernel that has been stripped of
a lot of stuff so it will fit on a boot-floppy for install purposes.
Several of the more basic drivers are compiled into the kernel, it isn't
set up to use initrd, and modules not needed for installation have been
removed. In lots of circumstances it will NOT be suitable for long-term
use beyond the initial install, as you have found out.
Fortunately, the pre-compiled "kernel-image" debs have all the stuff
there, and have been set up to be fully modular. This brings up some
"gotchas" if you decide to use it, though. Your other option is to d/l
the source and compile your own kernel. I believe using the
pre-compiled kernel-image debs will be a bit faster for you. I used the
"kernel-image-2.4.19-686 package out of "testing", but I believe you
will only get a 2.4.18 package if you stick to "Woody" or "Stable".
1. The new kernel image used initrd, so you WILL have to edit your
/etc/lilo.conf file and add the "initrd-/initrd.img" to your new vmlinuz
stanza. This is well documented, and you are warned. You will still be
able to use the "old" kernel to boot up if you make a mistake.
2. If you are using a NIC that had its driver pre-compiled into the
bf2.4 kernel (like the RealTek 8139 chipset), you will have to insert it
into the new kernel via modconf or add the proper module to the
/etc/modules file. If you don't, then you will NOT have networking
until you do.
3. You will have to add the "ide-scsi" and "sr_mod" modules to get your
burner recognized. When you do this, the old links to hdd (and/or hdc
depending on your config) will not work. If you have two CDROM devices
on hdc and hdd like I do, then hdc --> sr0, and hdd--> sr1. This means
you will probably have to change the soft-link for /dev/cdrom in your
/dev directory. I also created another "soft link" there for my burner
(/dev/cdr --> /dev/sr1). You might also have to add the second device
(cdr) to your /etc/fstab file to be able to mount it.
Thats all I can think of at the moment. That was about all I had to do
to get everything running normally after the install of the new