dmraid with kernel > 2.6.15 [SOLVED]

axs · n00b Joined: 23 Nov 2004 Posts: 12

Does genkernel 3.4.x still have issues creating the dmraid device nodes properly?? If so you might want to revert to genkernel 3.3.11d.

Also by default, genkernel uses its own internal version of dmraid, so you'll have to update genkernel.conf (as mentioned above) to use the new dmraid version, and copy the dmraid tar.bz2 from /usr/portage/distfiles/ to /usr/share/genkernel/pkg/ --that is, if you find you need the new dmraid version.

kami22 · Tux's lil' helper Joined: 14 Apr 2006 Posts: 86

Okay i found the error i have to user rc11 then it works really fine. Everything is okay. Thanks a lot. Problem Solved. Just use dmraid-1.0.0_rc11.

Cu kami

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

Hi there!

I have a VIA vt6421 IDE RAID Controller, and i followed the HOWTO in:
--> http://gentoo-wiki.com/HOWTO_Install_Gentoo_with_NVRAID_using_dmraid

and i am able to install grub has expected (in the 1st method of the HOWTO).

However, when i reboot, i get the infamous

Error 17: Unable to mount partition

this is my grub.conf:

bytesniper · n00b Joined: 12 Mar 2006 Posts: 33 Location: Abq, NM

I know that with mdraid the boot parition cannot be a stripe and would think that this would hold true to dmraid as well although I have never used it. gentoo-wiki appears to be down right now so not sure exactly what the how-to says but i would either mirror /boot or put it on a partition thats not in an array.

hth,
joseph

NeddySeagoon · Posted: Fri Sep 29, 2006 3:22 pm Post subject:

RenaFrita,

Welcome to Gentoo

You need to add dodmraid to your kernel line, or dmraid will not be started in the initrd.

What bytesniper says is correct for kernel raid but not true for dmraid. This is because the BIOS shows grub the fake raid as if it were a real physical drive, which keeps grun happy.

With the dodmraid missing, the dmraid kernel module is not started, so the dmraid partitions never appear.

[edit - I've moved yor post here with the other dmraid issues]
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

you mean like this?

Phk · Posted: Fri Sep 29, 2006 7:47 pm Post subject:

Hi there Rena
Hi there Neddy

We (me+Renafrita) tried fixing the grub.conf.. even deleting it.. No good, same s***

The problem with Rena's computer is very strange. We both have a FakeRaid0 with 2 HDD, and we did the installation side-by-side.
However, my installation required that i boot from diskette (grub said: "Cannot mount selected partition" when i "setup (hd0)"), but Rena's grub behave strangely.

natesully · n00b Joined: 23 Feb 2006 Posts: 48

Well, for once a google search didn't save me. I have an Nforce 5 AMD64 system, and my dmraid devices dissapeared- only "control" is under /dev/mapper. I updated the kernel, wich probably caused that, but now comes the fun part- I can't run the 2006.1 AMD64 livecd. Even with dodmraid and noapic (to stop the hang), dmraid detects no devices. The SATA works fine, I can acces individual drives and my standalone drive- but dmsetup reports "no detected devices".

Obviously, I'm in windows making this post, so I'm pretty sure some devices are there. The NVIDIA bios tool reports the raid is there as well.

Oddly enough, my kernel log shows some "dm-3" with a reiserfs partition on it being mounted as root right before init goes all single-user on me.

NeddySeagoon · Posted: Sat Sep 30, 2006 9:42 am Post subject:

Phk,

First, grub does not detect anything - it uses the drive information provided by the BIOS, which is why all drives are (hd... to grub.
Using a USB stick may complicate the issue. The BIOS will see it as a hard drive and that will change all your (hd... numbers, which will confuse grub.

As this threaad warns, genkernel uses its own dmraid, whch can be different to the version you get with emerge dmraid.
The thread also tells how to fix that.

I would order things slighthly differently on the kernel line

NeddySeagoon · Posted: Sat Sep 30, 2006 10:36 am Post subject:

natesully,

You probably have the old dmraid/new kernel issue which is fully descibed, with the solution, in this thread.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

hi one more time!

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

the dmraid and kernel versions that im using are the ones in the ls -al /boot

Thanks for all the help, im starting to get a little crazy with these

NeddySeagoon · Posted: Sat Sep 30, 2006 4:02 pm Post subject:

RenaFrita,

When does the error message come up ?

You have an 'old' kernel, Its before 2.6.16. That needs an old dmraid too.
If you have ever done an emerge sync, and a world update, you will have got the new dmraid and new genkernel.
That combination if know to fail.

If thats the problem, you will have a later kernel in /usr/src, the solution is to update to the newer kernel.
I cannot determine from your posts, what version of dmraid is in your initrd. For that, you need to read the genkernel config files
Your linuxrc should not be in boot, its inside the initrd file. Your

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

the erro comes up like this

GRUB loading stage1.5.
GRUB loading , please wait...
Error 17

i used the parameter --dmraid when i called genkernel

here is some of my config of genkernel.conf

RaceTM · Apprentice Joined: 16 Feb 2004 Posts: 281

NeddySeagoon · Posted: Tue Oct 03, 2006 9:06 am Post subject:

RenaFrita,

Your initrd is made with

RenaFrita · n00b Joined: 29 Sep 2006 Posts: 6

No i dint change my filesystem, and changed the genkernel.conf file after i post here to use my dmraid version and it wont work anyway :roll:

Anyway i give up on raid0, i dont have time to lose with that now, ill be back on january.

Thanks for all the help, ill be more luck next time;)

Zordas · n00b Joined: 10 Jun 2003 Posts: 19

I followed the instructions and it worked the very first time !!!

On a side note I wanted to let everyone know that Genkernel 3.4.1 DOES work. (At least it did on my NFORCE3 AMD64 rig). All I had to do was change Genkernel to dmraid-1.0.0.rc11 and move the package to the correct directory.

Thanks for the posts.. Saved me countless hours of heart/head aches.

hazer · n00b Joined: 02 Sep 2004 Posts: 55

Yet another problem with dmraid and updating...

Old system:

dmraid rc8
gentoo-sources 2.6.16-r1

Updates:

dmraid rc12-pre1
gentoo-sources 2.6.18

I've followed the directions in this thread on how to update dmraid and according to the shell after a reboot I have rc12-pre1 and device-mapper 4.7.0. The reason I'm in the shell is it goes to start dmraid and can't find any devices. I have a /dev/mapper directory, but all that is in there is a control file. I tried compiling dmraid static into the kernel but that puts me further away from this working (device-mapper goes to 'unknown' and /dev/mapper vanishes).

I have support built in for the SATA controller, I have dmraid compiled as a module (and I assume it's being included by genkernel for the boot), I've updated everything I can think of but I have to have missed something....

NeddySeagoon · Posted: Tue Oct 10, 2006 11:17 pm Post subject:

hazer,

Try

hazer · n00b Joined: 02 Sep 2004 Posts: 55

NeddySeagoon · Posted: Wed Oct 11, 2006 9:52 am Post subject:

hazer,

Your kernel and all of its modules must be compiled with the same version of gcc.
That means after a gcc update, you can no longer build 3rd party kernel modules, that includes dmraid and the nvidia kernel module. You can either switch back to you old gcc, or rebuild and reinstall the kernel.

There are two things loosly referred to as dmraild. The kernel part is device mapper support, which is under the Multiple Device section and the Red Hat maintained dmraid third party kernel module.

To make it all work nicely together, rebuild and reinstall your kernel using your new gcc and be sure you get the latest genkernel if you want to use genkernel. One recent version left out dmraid entirely. Details in this thread. The most recent genkernel uses a dmraid that works with kernels > 2.15.

Start your kernel build with

hazer · n00b Joined: 02 Sep 2004 Posts: 55

Yeah, I've been sure to do a manual "make clean" just to verify that nothing was there. I emerged the kernel after having updated gcc (then changed over to it with gcc-config), glibc, KDE and Xorg so it should have been 'clean' from the start but no reason not to make absolutely sure.

The thing that baffles me about the problem with the nvidia-driver is I emerged it after updating X and it ran for a week with multiple reboots with no problem (I have a 40gb IDE drive with a Windows install for playing World of Warcraft with friends). I went to reboot into Linux on Monday and bingo... no more X because the nvidia kernel module fails to load.

I'll revert back to the older gcc and re-emerge the nvidia-driver package. That *should* get me functional for now, but I'm still not sure why I can't get 2.6.18 to build and work.

When I compile device-mapper static in the kernel /dev/mapper doesn't appear in the shell. When I compile it as a module /dev/mapper appears, but only has a control file in it. As I said before I followed the directions in here to update dmraid to rc12-pre1 and I've done an 'emerge device-mapper' to make sure it's up to date.... it's like the hardware isn't being recognised by dmraid anymore and I'm not sure why.

AngryLlama · Tux's lil' helper Joined: 30 Sep 2004 Posts: 111

I'm sorry, but am I the only one who gets

AngryLlama · Tux's lil' helper Joined: 30 Sep 2004 Posts: 111

Anyone? I've followed the instructions on the first two pages of this thread.