amd64 kernel upgrade 2.6.15-r7 -> 2.6.16-r1 : dmraid failure

ztom · n00b Joined: 30 Mar 2006 Posts: 16

Hi,

I have boot & root partitions on separate /dev/sda and sdb & sdc are nvidia stripe configutarion.

Until 2.6.15-r7, everything worked just fine. all 5 partitions there ( some ntfs, some reiserfs) came online.
With 2.6.16 I can only see /dev/mapper/nvidia_ebceiddc and no partitions appear.

dmraid -r shows nicely

barbapapa · n00b Joined: 27 Jul 2005 Posts: 16

i got this bug too, with google i found that : "https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=186842", seems that dmraid need a patch, they speack of one but i don't see the one. It probably this if you got a message like "device-mapper: dm-stripe: Target length not divisible
by chunk size. device-mapper: error adding target to table"

kcbanner · n00b Joined: 04 Apr 2006 Posts: 61

I have this problem too.

DualCpuUser · n00b Joined: 03 Mar 2005 Posts: 71

I have this exact same problem. Yes I'm running ~amd64. So that implies I'm running on all latest ebuilds. Which I believe then includes the latest gentoo-sources.

I've bounced around versions of dmraid/device-mapper and even tried using rc8 in genkernel.conf but to no avail, I can't boot up. No root device found.

ls -l on /dev/mapper shows the control file and RAW RAID0 device, but no partitions and thus boot fails.

From up above in this post I'll down grade the kernel sources and give that a try.
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kcbanner · n00b Joined: 04 Apr 2006 Posts: 61

Downgraded to 2.6.14-r7, works fine. 2.6.15-r7 works fine tooo...arrg
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DualCpuUser · n00b Joined: 03 Mar 2005 Posts: 71

MorLipf · Posted: Mon Apr 10, 2006 7:55 pm Post subject:

I have the same problem. Is there a solution? I want to use the newest gentoo-sources.

DualCpuUser · n00b Joined: 03 Mar 2005 Posts: 71

garlicbread · Apprentice Joined: 06 Mar 2004 Posts: 182

a preliminary version of a rc11 binary was released on the bug link mentioned before - here

extract the rpm to a tar.gz file using rpm2targz
grab the /sbin/dmraid.static file
swap this with the dmraid binary in the initramfs image
I posted a script earlier that allows for easy changing of initramfs images - here

it seems to work for some but not others
the kernel devs added in a new restriction to the device-mapper library that only allows a stripe map to have a volume size which is a multiple of the chunk size for 2.6.16, so unless dmraid uses values within these ranges, the device-mapper library won't create the mapping which causes the problem
also a gentoo bug related - here

if editing initramfs boot images, remember to always make backups with backup grub menu entries just in case something messes up and you end up with an unbootable system
if unsure, just wait for dmraid rc11 to be released properly, with genkernel support before using 2.6.16

Tyler_Durden · Posted: Mon Apr 17, 2006 12:14 am Post subject:

yeah, dmraid-1.0.0.rc11-pre1-1 is working again here!
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Erlend · Guru Joined: 26 Dec 2004 Posts: 493

I'm running dmsetup (to do what dmraid does, but without rediscovering the drives every boot) and I get this problem. Any ideas?

Thanks,

Erlend