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jrsx13
n00b
Joined: 28 Oct 2003
Posts: 50
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 Posted: Thu Nov 29, 2012 8:55 am Post subject: mdmon not being activated on new kernels |
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Anyone know why I can't get mdmon to activate on a kernel after gentoo-sources-3.6.2?
For example if I use genkernel to make a kernel for gentoo-sources-3.6.8 the root file system mounts root only.
And so I have to do the following when it boots as it is read only:
mdmon /dev/md(N+1)
mount -o remount,rw /
After doing that it is read and write. I need this to happen at boot.
I have tried several different kernels, and versions of genkernel.
Kind of at a loss...
Cheers.
It is basically this problem: https://bbs.archlinux.org/viewtopic.php?id=137058 but on Gentoo not Arch.
Thanks |
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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5945
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| Posted: Thu Nov 29, 2012 9:26 am Post subject: |
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what sb metadata are you using?
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Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein |
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jrsx13
n00b
Joined: 28 Oct 2003
Posts: 50
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| Posted: Thu Nov 29, 2012 8:43 pm Post subject: |
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ARRAY /dev/md/imsm0 metadata=imsm
| Code: |
# cat /proc/mdstat
Personalities : [raid1]
md126 : active raid1 sda[1] sdb[0]
625129472 blocks super external:/md127/0 [2/2] [UU]
md127 : inactive sdb[1](S) sda[0](S)
4520 blocks super external:imsm
unused devices: <none>
# mdadm --detail /dev/md126
/dev/md126:
Container : /dev/md/imsm0, member 0
Raid Level : raid1
Array Size : 625129472 (596.17 GiB 640.13 GB)
Used Dev Size : 625129604 (596.17 GiB 640.13 GB)
Raid Devices : 2
Total Devices : 2
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : d60b505d:ae5bf6a0:096ba81d:583a149a
Number Major Minor RaidDevice State
1 8 0 0 active sync /dev/sda
0 8 16 1 active sync /dev/sdb
# mdadm -D --scan
ARRAY /dev/md/imsm0 metadata=imsm UUID=bed903e1:10d63c86:5a92bab0:380e8b9a
ARRAY /dev/md/boron_0 container=/dev/md/imsm0 member=0 UUID=d60b505d:ae5bf6a0:096ba81d:583a149a
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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5945
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| Posted: Thu Nov 29, 2012 9:04 pm Post subject: |
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sorry, not idea what that means, hope you'll solve it.
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Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein |
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danomac
l33t
Joined: 06 Nov 2004
Posts: 881
Location: Vancouver, BC
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| Posted: Thu Nov 29, 2012 11:22 pm Post subject: |
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It's a imsm (Intel) fakeraid.
What's your /etc/genkernel.conf look like? What's the kernel config that genkernel look like? Maybe post them to pastebin or similar.
I'm on 3.4.9 (or newer, I think I upgraded...) and I have zero issues. I always configure my kernel manually, even when using genkernel.
I can't remember now, but genkernel backs up kernel configs somewhere (maybe in /etc somewhere?) I can't look now, but if you find it post it. |
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jrsx13
n00b
Joined: 28 Oct 2003
Posts: 50
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| Posted: Fri Nov 30, 2012 2:26 am Post subject: |
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Yup, it is Intel but I haven't really had much of a problem up until now. Right now I am in the 3.6.2 kernel without an issue.
I configure my kernel manually as well using "make menuconfig" and just use genkernel to make the image files to boot up. The command I use for genkernel is:
| Code: | | genkernel --mdadm --kernel-config=/root/docs/config all |
It may be worth noting I have never edited genkernel.conf
Kernel Config file:
http://pastebin.com/veGc9rkP
genkernel.conf file:
http://pastebin.com/v1PjEeXV
As an aside, from genkernel.conf I noted that is a recent change that coincided about the time this broke for me, though it could just be a coincidence.
| Code: | # NOTE: Since genkernel 3.4.41 the version of
# busybox, lvm, mdadm, .. have been moved to
# /usr/share/genkernel/defaults/software.sh in order to
# reduce the merging you have to do during etc-update.
# You can still override these settings in here. |
Here is when the last good kernel was built:
| Code: | | 3.6.2-gentoo #1 SMP Mon Oct 15 21:34:49 EDT 2012 |
I learned of a manual fix from that Arch forum https://bbs.archlinux.org/viewtopic.php?id=137058. I can describe briefly what happens.
I boot into my new kernel and the raid is write protected, and "mount -o remount,rw /" does nothing. However if I type "mdmon /dev/md127" which is the raid container I can then use the "mount -o remount,rw /" command without issue.
So I suspect that it has something to do with that command not being entered into the boot image by genkernel.
Thanks! |
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danomac
l33t
Joined: 06 Nov 2004
Posts: 881
Location: Vancouver, BC
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| Posted: Mon Dec 03, 2012 8:35 pm Post subject: |
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What version of mdadm is genkernel using? Another user had a problem with it not being able to mount.
I pasted my genkernel.conf (which, at the time, used a newer mdadm than genkernel used) and he recompiled using it - the problem he had went away.
It may just be an old version of mdadm that's being used in the initrd. |
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