Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
mdmon not being activated on new kernels
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware
View previous topic :: View next topic  
Author Message
jrsx13
n00b
n00b


Joined: 28 Oct 2003
Posts: 50

PostPosted: Thu Nov 29, 2012 8:55 am    Post subject: mdmon not being activated on new kernels Reply with quote

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
Back to top
View user's profile Send private message
DaggyStyle
Advocate
Advocate


Joined: 22 Mar 2006
Posts: 4895

PostPosted: Thu Nov 29, 2012 9:26 am    Post subject: Reply with quote

what sb metadata are you using?
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein
ProjectFootball
Back to top
View user's profile Send private message
jrsx13
n00b
n00b


Joined: 28 Oct 2003
Posts: 50

PostPosted: Thu Nov 29, 2012 8:43 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message
DaggyStyle
Advocate
Advocate


Joined: 22 Mar 2006
Posts: 4895

PostPosted: Thu Nov 29, 2012 9:04 pm    Post subject: Reply with quote

sorry, not idea what that means, hope you'll solve it.
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein
ProjectFootball
Back to top
View user's profile Send private message
danomac
l33t
l33t


Joined: 06 Nov 2004
Posts: 817
Location: Vancouver, BC

PostPosted: Thu Nov 29, 2012 11:22 pm    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message
jrsx13
n00b
n00b


Joined: 28 Oct 2003
Posts: 50

PostPosted: Fri Nov 30, 2012 2:26 am    Post subject: Reply with quote

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!
Back to top
View user's profile Send private message
danomac
l33t
l33t


Joined: 06 Nov 2004
Posts: 817
Location: Vancouver, BC

PostPosted: Mon Dec 03, 2012 8:35 pm    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum