Very Computer

Currently original RH 72. kernel 2.4.18-3 is installed and work. CDROM
works as well. I can mount  and umount. After building the new kernel
and booting with it. I noticed that CDROM no longer mounts.

in my libs dir I have the following dirs.
drwxr-xr-x    2 root     root         4096 Feb 26 12:41 ieee1394
drwxr-xr-x    2 root     root         4096 Feb 26 12:41 md
drwxr-xr-x    2 root     root         4096 Feb 26 14:35 net

dmesg in 2.4.18-3
hdb: C/H/S=0/0/0 from BIOS ignored
hdb: Maxtor 6Y080P0, ATA DISK drive
hdd: LITE-ON LTR-52246S, ATAPI CD/DVD-ROM drive

...
SCSI subsystem driver Revision: 1.00
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
  Vendor: LITE-ON   Model: LTR-52246S        Rev: 6S0A
  Type:   CD-ROM                             ANSI SCSI revision: 02

lrwxrwxrwx    1 root     root            9 Feb 26 16:29 /dev/cdrom ->
/dev/scd0

dmesg in 2.4.20
Kernel command line: ro root=/dev/hdb2 hdd=ide-scsi
ide_setup: hdd=ide-scsi

hdb: C/H/S=0/0/0 from BIOS ignored
hdb: Maxtor 6Y080P0, ATA DISK drive
hdd: LITE-ON LTR-52246S, ATAPI CD/DVD-ROM drive

SCSI subsystem driver Revision: 1.00
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2

hdd: driver not present

Can someone suggest what to do? When I compile the 2.4.20 kernel I try
to enable as much as possible but must be missing something.  I have
untared source into my home dir and not /usr/src/linux-2.4.20  . Is
there a gotcha.?

Thanks in advance.
Roman

It's been a long time since I set this up on a machine.  As I recall,
I followed the instructions in the CD-Writing howto file and
everything worked like a charm.  The trick is to get the SCSI
emulation to load, while keeping the IDE stuff out.  Since you
are building your own kernel, you can make sure that
CONFIG_BLK_DEV_IDECD is not set and CONFIG_BLK_DEV_IDESCSI is.