3Ware IDE-RAID0 and IDE-SCSI emulation issue

[cirrus]

Hello,


I don't know how to fix this:

I want to use a bootable 3Ware-IDE-RAID0 and the IDE-SCSI emulation for an IDE-CDRW and an IDE-DVDRW.

There is a generic 3Ware driver in the kernel at SCSI-adapters. So I think the adapter is used like a real SCSI-Adapter. So I have to compile the kernel with full (1) SCSI-Support and (2) SCSI-disk-support if I want to boot from the 3Ware-IDE-RAID0 (compiling (1) + (2) as "modules" it's not recognized during boot - a MD device is recognized...).

Now I want to mount the both IDE burning devices connected to the Sec.IDE-onboard-controller into the system using the IDE-SCSI emulation. So I set the kernel boot option hdc=scsi-ide hdd=scsi-ide. Dmesg says its done so.

But to run the ide-scsi emulation now I have to compile (1) + (2) as Modules ! Otherwise the "modules" are loaded in a wrong sequence so that the Module IDE-SCSI won`t function.

When I compile the kernel for the 3Ware-controller as described first using the options hdc=ide-scsi hdd=ide-scsi and now do a modprobe ide-scsi the system freezes.


Has anyone an idea what to do?
My only ideas are:
- Wait for the next kernel generation 2.6 which has full ATAPI support for IDE-CDRW/DVDRW
- Using the 3Ware-RAID0 with help of MD devices, but I don't know how to do this... it must be tricky to configure it and whatsmore, the linux partitions are at this time /dev/SDA9 - 11, so there are other partitions on the same raid0 too.


Thanks for ideas,

Karsten.

[Ulukay]

compile the things as mdoules and create a initrd (as i did to boot from my hpt374 with the opensource drivers)

[cirrus]

To use initrd do I only have to put in the initrd line into grub.conf after compiling the kernel the modules only.

Is there an initrd option in the kernel?


Thanks.

[Ulukay]

ähem ...
the initrd is a zipped ext2 image of some config files and modules you need do boot - you have to create it manually and add the modules you need to boot

grub grabs at boot the initrd and loads it into a ramdisk (so are the modules available during the normal boot process)

you need to emerge lvm-user

after you compiled the kernel and the modules you need to create a blank standard initrd with: lvmcreate_initrd "kernelversion"

maybee this will help you adding modules into your initrd:
http://forums.gentoo.org/viewtopic.php? ... ght=hpt374

after all - add the initrd into grub.conf

[cirrus]

I did it as described in the link above. I compiled the kernel only with modules.

I added ...

sg.o
sr_mod.o
sd_mod.o
scsi_mod.o
3w-xxxx.o

to /tmp/initrd.ext2

and gziped it again. Copy to /boot.


Now grub.conf contents of:

root(0,8)
kernel (hd0,8)/boot/bzImage root=/dev/sda11 .....
initrd (hd0,8)/boot/initrd

When I reboot the MD-Driver is loaded and says autodetecting RAID array. Two seconds later there is Kernel-panic , I have to append the correct "root=" boot option. The problem is, the kernel doesn't detect the 3Ware now, the module didn't start yet. Thus there is no /dev/sda11 ...

In other words: It doesn't work so far.


What did I wrong? Any idea?

Thanks, Karsten.

[Ulukay]

did you:

added in the /mnt/initrd/linuxrc
/sbin/insmod -f /modules/scsi_mod.o
/sbin/insmod -f /modules/sd_mod.o
/sbin/insmod -f /modules/3w-xxxx.o

with all modules????


btw. which 3ware are you using?

[cirrus]

I added the modules but not with the -f option, is it necessary?
I will try.

I use the 3Ware 7000-2 with 2 ports and two 160GB Samsung.

Will be back soon....


Karsten.

[Ulukay]

if it does not work, you can add me in icq
43757581

[cirrus]

Hi,


now I added the -f option and nothing has changed.
But when I did the initrd modify I didn't copy initrd.old from the mentioned path because it is simply not present?

I installed Gentoo before using 3Ware not as module but with full support. When I did boot the 3Ware Controller was found before the MD-device driver comes up... Now there is no message of the 3Ware driver at all, it seems as if initrd wouldn't try to load the scsi_mod,sd_mod or 3w-xxxx driver....!?!?

Any idea?

Karsten

[cirrus]

Heyho... it works now !!!


What's gone wrong:

I had to compile the kernel again with initrd support included (but I asked to do so before ...?!?
http://forums.gentoo.org/viewtopic.php? ... nitrd+1024

OK, then initrd loaded during boot.

Important: It was necessary, that all the scsi-modules were up-to-date in the new initrd, so after recompiling the kernel I had to copy the mentioned modules (scsi_mod.o etc...) to /mnt/initrd once again and made a fresh new initrd!

Btw: I didn't used the /modules path at all, the modules are in /mnt/initrd only.

First I added the three modules:
scsi_mod.o
sd_mod.o
3w-xxxx.o
and so my 3Ware-RAID0 was recognized again!

After booting up again I did a modprobe ide-scsi at the konsole and I got a freeze again! The sequence of loading the modules was still wrong, I know.

So I modified my linuxrc again:

scsi_mod.o
sd_mod.o
ide-scsi.o
3w-xxxx.o

Now the ide-scsi modules was loaded before the 3Ware adapter during boot sequence. And the system started now !!!!


Before I can say more about mounting the CDRW / DVD RWs correctly I have to install the rest of the system now because this is a complete fresh Gentoo installation process.
I will post a message when everything is completed and I can do a

cdrecord -scanbus
again.


Thanks so far,

Karsten.

[Motormouz]

Ordering problems with modules compiled in are easily solved if you append the following statement to the line used in grub or lilo that is used to boot the kernel:

scsihosts=ide-scsi:3w-xxxx

This tells the kernel that devices discovered by the ide-scsi driver should be enumerated before devices discovered by de 3ware driver.

[gwung]

I was trying to follow this discussion.

i'm new to gentoo and I've got a freshly installed gentoo 2004.1 from livecd and encountered similar problems. how to compile the 3ware 2-port driver in the kernel and make it boot off the card? what steps do i need to take?

thanks in advance!