topic Re: Still Have CDROM Problem in Operating System - Linux

Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 07:33:20 GMT

This has been an ongoing problem and I have posted it here for resolution and I appreciate everyones help. I built a kernel from scratch to support ACL. the kernel has XFS support. I still cant see my cdrom with

cdrecord -scanbus, it returns:

[root@pompano boot]# cdrecord -scanbus
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 JÃ¶rg Schilling
cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

I am still missing something and I cant figure it out. Its probably simple.

My modules.conf file looks like:

alias scsi_hostadapter sym53c8xx
alias scsi_hostadapter1 megaraid
options ide-cd ignore=hda #ignore ide-cd for hda
alias scd0 sr_mod #load sr_mod upon access of scd0
pre-install sg modprobe ide-scsi # load ide-scsi before sg
pre-install sr_mod modprobe ide-scsi #load ide-scsi before sr_mod
pre-install ide-scsi modprobe ide-cd #loa ide-cd before ide-scsi

not sure where to go from here.

Re: Still Have CDROM Problem

Huc_1 — Wed, 15 Oct 2003 07:47:56 GMT

First I would check to see if your scsi card is loaded.

#dmesg

if this is loaded

#lsmod

This should show something like

sym58c8xx
ide-cd

as loaded

if not insmod
#insmod ide-cd

Cut past from your dmesg and lsmod here so we can have a look and try help futher.

J-P

Re: Still Have CDROM Problem

Patrick Van Humbeeck — Wed, 15 Oct 2003 07:53:16 GMT

also did you pass hdx=ide-scsi to the kernel at boot time ? (from grub or lilo)

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:00:45 GMT

Patrick yes, you mean in /boot/grub/grub.conf?
If so, then yea I have that entry in there.

I loaded another SCSI parm and I can run cdrecord -scanbus but as you can see, no cdrom.

root@pompano root]# cdrecord -scanbus
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jrg Schilling
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.7'
cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.75-RH '@(#)scsi-linux-sg.c 1.75 02/10/21 Copyright 1997 J. Schilling').
scsibus0:
0,0,0 0) 'HP ' '18.2GB C 68-P94N' 'P94N' Disk
0,1,0 1) 'HP ' '9.10GB C 68-BX05' 'BX05' Disk
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *
scsibus1:
1,0,0 100) *
1,1,0 101) *
1,2,0 102) 'HP ' 'C1537A ' 'L105' Removable Tape
1,3,0 103) *
1,4,0 104) *
1,5,0 105) *
1,6,0 106) *
1,7,0 107) *

When I run mondoarchive, I get the following error.

insmod: ide-scsi: no module by that name found

Funny though, If I boot from a mondoarchive cdrom backup cd, it wants to go. Looks like it boots fine from the firmware. Not sure whats going on,,,kernel problem?

I am in the process of trying the suggestions above. I'll post the outcome in a few minutes.

Re: Still Have CDROM Problem

Patrick Van Humbeeck — Wed, 15 Oct 2003 08:06:06 GMT

well your problem is probably right there, you do not have the ide-scsi module on your system (unless you compiled that into the kernel ? what does grep -i ide-scsi /usr/src/linux/.config say ?)

try to find that module and load it:
find /lib/modules -name 'ide-scsi.o'
modprobe ide-scsi

that should help. In case you forgot to build the kernel (line in .config is commented out) just change that line to read IDE-SCSI=m (not sure about the exact name) and run make clean && make dep && make modules modules_install from /usr/src/linux, then you should be able to load it.

Re: Still Have CDROM Problem

Mark Grant — Wed, 15 Oct 2003 08:08:37 GMT

I take it you have "CONFIG_BLK_DEV_IDESCSI" (SCSI emulation support) in your kernel.

Re: Still Have CDROM Problem

Huc_1 — Wed, 15 Oct 2003 08:24:34 GMT

Yes, check and see your .config file

I also found

/usr/share/doc/kernel-doc-2.4.20/ide.txt
on my system did not know about this look some usefull info in there! also about ide-cd

My god this forums is fast, just turn around answer phone and 2 good replys ! wow

J-P

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:24:43 GMT

dmesg is attached. I am guessing that my scsi card is loaded because I am using SCSI drives.

#lsmod
returns nothing....

[root@pompano root]# insmod ide-cd
insmod: ide-cd: no module by that name found

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:28:46 GMT

Sorry...here you go...dmesg

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:32:31 GMT

OK once again...

Re: Still Have CDROM Problem

Alexander Chuzhoy — Wed, 15 Oct 2003 08:34:09 GMT

I'm sorry.
Do you have 2 CDROMS?
it seems from the file that the cdrom/dvdrom is ide device that sits on hda
cdrecord -scanbus usefull to find SCSI devices...

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:36:42 GMT

Patrick,

grep -i ide-scsi /app/kernel/linux-2.4.19/.config

Returns nothing...

Re: Still Have CDROM Problem

Patrick Van Humbeeck — Wed, 15 Oct 2003 08:38:19 GMT

Yeah sorry as Mark kindly mentionned above, the line you want to look for is called CONFIG_BLK_DEV_IDESCSI which does not match grep -i ide-scsi, I replied a bit too fast :)

what does it say for CONFIG_BLK_DEV_IDESCSI ?

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:40:57 GMT

Marc,

CONFIG_BLK_DEV_IDESCSI is not set

this was in my .config file

Re: Still Have CDROM Problem

Huc_1 — Wed, 15 Oct 2003 08:42:36 GMT

Your dmesg show your disk and scsi cards no problem there.

but the fact that you find no lsmod is not so good !

Are you sure you did

make modules
modules install

after you created your new kernel ...

for that matter are you sure it is your new kernel that is booted ?

Normal situation is /etc/modules.conf populated and lsmod returning value

Dont despair, well get you there.

I will go grab a bite now, before collaps

J-P

Re: Still Have CDROM Problem

Patrick Van Humbeeck — Wed, 15 Oct 2003 08:42:37 GMT

well then just change that line to remove the # in front and append =m, then save (well, use the same syntax as other modules defined in there).

then run the make commands as I put in an earlier post, this will build the needed module and should fix your issue.

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:43:10 GMT

Only 1 cdrom.

DVD/RW

Re: Still Have CDROM Problem

Mark Grant — Wed, 15 Oct 2003 08:46:11 GMT

Although it looks like your cdrom is attached to a detected ide card the general ide set up looks really wacky. If I were you, I would include CONFIG_BLK_DEV_SVWKS (ServerWorks OSB4 chipset support) in your kernel. It might make things a bit saner at least.

Re: Still Have CDROM Problem

Alexander Chuzhoy — Wed, 15 Oct 2003 08:47:43 GMT

Well then does it really SCSI device?
Maybe it's IDE?
Where does it connect to?
You know just to be sure....

Re: Still Have CDROM Problem

Nobody's Hero — Wed, 15 Oct 2003 08:56:42 GMT

Yes ide cdrom...

When I compile a kernel, during the make modules install,
I get the following error:

No module sym53c8xx found for kernel 2.4.19-xfs
mkinitrd failed
make[1]: *** [install] Error 1
make[1]: Leaving directory `/app/kernel/linux-2.4.19/arch/i386/boot'
make: *** [install] Error 2