On Wed, Oct 15, 2003 at 07:12:55AM -0700, Sidney Brooks wrote: | I am reaching a stage of complete frustration in my | effort to install a CD writer. I have Debian woody | with a 2.4.22 kernel that I got from www.kernel.org. | | My effort to configure the kernel for the scsi | emulation always fails.
Here's what worked (very well, I might add) for me:
Configuring the kernel (this is done before compiling the kernel):
# ATA/IDE/MFM/RLL support
CONFIG_IDE=y
# IDE, ATA and ATAPI Block devices
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_IDESCSI=m
# SCSI support
CONFIG_SCSI=m
# SCSI support type (disk, tape, CD-ROM)
CONFIG_BLK_DEV_SD=m
CONFIG_BLK_DEV_SR=m
CONFIG_CHR_DEV_SG=m
I included the IDE CD support as a module in case I still wanted to
use it. The key is to include the IDE-SCSI emulation, and also
include the higher-level SCSI drivers ('sr_mod', 'sd' and 'sg').
Once the kernel is built, install it. I don't use any special
parameters when booting the kernel.
In /etc/modules I have the following relevant lines :
# disks
ide-scsi
# SCSI CDROM layer (needed to access the cd (eg by xmms))
sr_mod
# Generic SCSI layer (needed by cdparanoia)
sg
#ide-cd
Note that ide-cd is not loaded, but ide-scsi is.
I have the following in /etc/modutils/Local-dman but since I never
load the ide-cd driver I don't think it really matters. (it would
matter if you loaded ide-cd to use for some drives but wanted ide-scsi
to handle others)
options ide-cd ignore="hdd"
| I still end up with ide not sg
| when I do /proc/devices.
I have both, because I still have IDE disks (hard drives) in the
system :
$ cat /proc/devices
[...]
Block devices:
3 ide0
7 loop
11 sr
22 ide1
58 lvm
Following the above (including the drivers in the kernel as modules,
loading (only) the desired modules) I end up with :
$ ls -l /dev/cdrom /dev/cdroms/*
lr-xr-xr-x 1 root root 13 2003-09-30 23:56 /dev/cdrom -> cdroms/cdrom0
lr-xr-xr-x 1 root root 34 1969-12-31 19:00 /dev/cdroms/cdrom0 ->
../scsi/host0/bus0/target0/lun0/cd
lr-xr-xr-x 1 root root 34 1969-12-31 19:00 /dev/cdroms/cdrom1 ->
../scsi/host0/bus0/target1/lun0/cd
The files are symlinks to device files with really long paths because
I am also using devfs. If you are not using devfs then you may need
to manually adjust the /dev/cdrom symlink to point to the appropriate
device node.
HTH,
-D
--
Many a man claims to have unfailing love,
but a faithful man who can find?
Proverbs 20:6
http://dman13.dyndns.org/~dman/
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