Hello,

After installing Mandrake 9.1 on my HP ze4200, the external IEE1394 harddisk is not available. It should have the
directory /dev/sdax, but it is not there. The IEEE drivers are loaded. My internal CD/DVD combo is available, using /dev/scd1

In the lilo.conf file there is an entry, called hda=ide-scsi. When I remove this entry, the CD drive is not available anymore, BUT the IEEE1394 is working.
Mandrake recognizes this automatically during booting, that there is a new drive, and also that the CD drive is gone...

What exactly does the hda=ide-scsi option means, and could anybody give me a hint or solution, to get both drives working together?

Thanks in advance,
Oliver

i found this, i might give you some clues as to why if it doesnt actually answer your question.
Linux Setup:
The Linux CD-R user software tools (e.g., cdrecord) all work only with SCSI devices, so if you have an IDE CD-R drive, you need to access it with the ide-scsi driver (loadable kernel module), NOT with the normal ide-cdrom driver, so that it looks like a scsi device to cdrecord. And if you want to be able to copy from you CD-ROM to your CD-R drive (you do), then you must also use the ide-scsi driver on your CD-ROM. Basically, just use ide-scsi for ALL your CD drives, and be done with it.

First you need to edit /etc/lilo.conf to tell the kernel to use the ide-scsi driver. Your CD-ROM is likely device 'hdc', but look through your /var/log/dmesg boot messages to find out for sure. Then edit /etc/lilo.conf as appropriate, e.g.:

image=/vmlinuz
label=Linux
read-only
# Use SCSI for IDE CD-ROM/DVD and CD-R drives:
append="hda=ide-scsi hdc=ide-scsi"
# /dev/{sr0,scd0} are the DVD
# /dev/{sr1,scd1} are the CD-R

After ediing lilo.conf, run 'sudo lilo' to install your new lilo settings into your MBR, and reboot ('sudo shutdown -r now').

After successfully rebooting, again look through /var/log/dmesg to find the new, SCSI-style device name - mine was 'sr0'. Now you have to change your /dev/cdrom symlink to point to the correct new SCSI device for you CD-ROM:

$ ls -l /dev/cdrom
lrwxrwxrwx 1 root root 8 Nov 8 18:25 /dev/cdrom -> /dev/hdc
$ sudo rm /dev/cdrom
$ sudo ln -s /dev/sr0 /dev/cdrom
$ ls -l /dev/cdrom /dev/sr0 /dev/scd0
lrwxrwxrwx 1 root root 8 Nov 8 18:25 /dev/cdrom -> /dev/sr0
lrwxrwxrwx 1 root root 4 Nov 2 09:47 /dev/sr0 -> scd0
brw-rw---- 1 root cdrom 11, 0 Mar 14 2002 /dev/scd0

$ sudo cdrecord -scanbus
Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jvrg Schilling
Linux sg driver version: 3.1.22
Using libscg version 'schily-0.5'
scsibus0:
0,0,0 0) '3ware ' '3w-xxxx ' '1.0' Disk
scsibus1:
1,0,0 100) 'PIONEER ' 'DVD-ROM DVD-116 ' '1.22' Removable CD-ROM
1,1,0 101) 'TEAC ' 'CD-W540E ' '1.0D' Removable CD-ROM