Please someone clear this up: IDE-SCSI && kernel

Rhiz()m3 · n00b Joined: 31 Aug 2002 Posts: 41

I have read hella posts on the subject and conceptually scsi emulation is not that difficult. But nowhere can I find anything telling exactly which things to add to the kernel and whether or not they should be modulized or compiled in. Can someone puleaze tell me exactly which and how. Sorry for being such a choad, but I've already rebuilt my kern 3 times to no avail.
_________________
--------> Why don't you bastards start wearing human skins?<--------

rac · Posted: Thu Sep 05, 2002 5:49 am Post subject:

On my machine with SCSI emulation only (no real SCSI host adaptor), I have under ATA/IDE support, SCSI emulation support. Under SCSI support, SCSI support, SCSI CD-ROM support, SCSI generic support. No SCSI low-level drivers. All of the above are in the kernel; nothing is made as a module.
_________________
For every higher wall, there is a taller ladder

Rhiz()m3 · n00b Joined: 31 Aug 2002 Posts: 41

does that mean that under ATA/IDE you do not have IDE CDROM SUPPORT? Instead, the SCSI CDROM creates /dev/cdroms/cdromx?
_________________
--------> Why don't you bastards start wearing human skins?<--------

rac · Posted: Thu Sep 05, 2002 6:03 am Post subject: Re: rock rac!

Rhiz()m3 · n00b Joined: 31 Aug 2002 Posts: 41

man, thank you so much.. you've done your good deed for the day. :idea:

_________________
--------> Why don't you bastards start wearing human skins?<--------

TheCoop · Posted: Thu Sep 05, 2002 3:25 pm Post subject:

if you dont compile ide cdrom support, do you need to specify hdd=scsi on the kernel command line?
_________________
95% of all computer errors occur between chair and keyboard (TM)

"One World, One web, One program" - Microsoft Promo ad.
"Ein Volk, Ein Reich, Ein Führer" - Adolf Hitler

Change the world - move a rock

rac · Posted: Thu Sep 05, 2002 5:47 pm Post subject:

TheCoop · Posted: Thu Sep 05, 2002 6:43 pm Post subject:

hdd=scsi works as well
_________________
95% of all computer errors occur between chair and keyboard (TM)

"One World, One web, One program" - Microsoft Promo ad.
"Ein Volk, Ein Reich, Ein Führer" - Adolf Hitler

Change the world - move a rock

karl11 · Guru Joined: 25 Jun 2002 Posts: 469 Location: Raleigh, NC

Reason being it's still on the ide bus. It's just that you don't have support for a CD drive on the ide bus. I personally run both ide cdrom support and ide-scsi emulation (for my burner) and it's never failed me yet. Works quite well, but on a system level(below OS), it's still an ide device, and thus at kernel load is still mapped as one. The module ide-scsi doesn't load until the boot is almost done anyway.

Karl

dantrevino · Posted: Fri Sep 27, 2002 8:38 am Post subject: cdrw problem

I've done this before and cant figure why I'm having problems. I've verifed all my kernel settings. hdd=ide-scsi is being passed to the kernel. The following is a snippet from dmesg:

====================================
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr0: scsi3-mmc drive: 20x/32x writer cd/rw xa/form2 cdda tray
=====================================

When I run gcombust I get this error message:
======================================
Cdrecord 1.11a34 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
/usr/bin/cdrecord: Read-only file system. Cannot open '/dev/pg0'. Cannot open SCSI driver.
/usr/bin/cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
=====================================

I've tried adding /dev/sr0 to the override box with no luck.

cdrecord -scanbus gives this output:
=====================================
bash-2.05a$ cdrecord -scanbus
Cdrecord 1.11a34 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jrrg Schilling
cdrecord: Read-only file system. Cannot open '/dev/pg0'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
====================================

Of course there is no /dev/pg0, but /dev/sr0 exists as a link:
lr-xr-xr-x 1 root root 31 Sep 27 04:15 /dev/sr0 -> scsi/host0/bus0/target0/lun0/cd

What is the difference between pg*, sg*, or sr*? Previously my cdrw was showing up as sg0. Any ideas anyone? ....Anyone?
_________________
embrace the wrevolution
http://wrevolution.org/

jay · l33t Joined: 08 May 2002 Posts: 980

I'm having problems too:

dantrevino · Posted: Wed May 28, 2003 5:41 pm Post subject:

biroed · Posted: Thu May 29, 2003 7:04 am Post subject:

jay · l33t Joined: 08 May 2002 Posts: 980

Thanks, I changed the permissions and switched to sr0. The problem however persisted.
But I'm beginning to understand... a new version of cdrecord is out and now the device is treated as ATAPI:

biroed · Posted: Thu May 29, 2003 7:14 pm Post subject:

are you sure you load the ide-scsi module?(and generic support)
If it's not loaded you get the errors like cannot open /dev/sg0.

Thetargos · Posted: Tue Jun 03, 2003 5:08 am Post subject:

I got my drives to work properly, but still need to find a way to load the ide-scsi module at start up. How would I do that?

EDIT: ATM I need to load the modules manually, to make cdrecord -scanbus detect my optical drives (otherwise it only detects my Paralell Zip drive)

jay · l33t Joined: 08 May 2002 Posts: 980

Yes I made sure that I loaded the ide-scsi module. There is no difference. If I remove the hdc=ide-scsi from the kernel command line, both devices are on the same bus, if I leave the line in both devices are on a different bus (see above).
But both are still treated as ATAPI ide devices.
_________________
Do you want your posessions identified? [ynq] (n)

jay · l33t Joined: 08 May 2002 Posts: 980

Thetargos · Posted: Tue Jun 03, 2003 4:05 pm Post subject:

Jay:

I tried, but in the first reboot I got a modprobe complaint about line 107 of modules.conf (via etc-update I think) which happens to reffer to a modprobe ide-scsi command and would not let me go into X environment. Odd thing here is that it only complaints when trying to initialize X. I have changed the runlevel to non-X and tried to startx (without commenting out the line about modprobing the modules in modules.conf) and I get the error in /var/log/XFree86.0.log stating that same line as in the start up check up. But after going into X if I manually load the module either by insmod or modprobe it would load, but wont be able to load at boot time