Re: Boot issue, new installation of Lenny with mirrored /boot and mirrored lvm2

2009-07-03 Thread Frank Lin PIAT 
Hi,

On Fri, 2009-07-03 at 12:53 +1000, Andrew McGlashan wrote:
 
 I have 2x IBM xSeries 346 servers, one has a RAID card (let's call this 
 machine 346a) and the other only has onboard SCSI (346b).
 
 [..] it stops at a 
 special initramfs sh after giving up on the lvm volume group (not found) ... 
 from there I can activate the md0 and md1 mirrors and activate the lvm2 
 logical volumes, I then exit the sh and boot continues as normal.
 
 I've checked the kernel and module files for each machine, they are 100% 
 identical.  I've checked all files in /boot and /boot/grub and the 
 differences don't give me any clues.

Your problem is probably inside your /boot/initrd... file

You might want to rebuild it, using update-initramfs

Also, did you read /usr/share/doc/mdadm/rootraiddoc.97.html (which is
outdated, but gives good overview)

Hope this helps,

Franklin


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Re: Boot issue, new installation of Lenny with mirrored /boot and mirrored lvm2

2009-07-03 Thread Andrew McGlashan 
Hi Franklin,

On Fri, July 3, 2009 4:36 pm, Frank Lin PIAT wrote:
 Your problem is probably inside your /boot/initrd... file

 You might want to rebuild it, using update-initramfs

Tried that, multiple ways:

update-initramfs -u -k all
update-initramfs -n -k all

 Also, did you read /usr/share/doc/mdadm/rootraiddoc.97.html (which is
 outdated, but gives good overview)

No, not yet.  But the other 346 machine is working fine and I don't think
that I have anything missing in my understanding other than why mdadm
isn't assembling the drives as it should on the 'bad' machine when the
processes are exactly the same and work fine on the 'good' machine.

 Hope this helps,

Thanks.

Kind Regards
AndrewM

Andrew McGlashan
Broadband Solutions now including VoIP



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Boot issue, new installation of Lenny with mirrored /boot and mirrored lvm2

2009-07-02 Thread Andrew McGlashan 

Hi,

I have 2x IBM xSeries 346 servers, one has a RAID card (let's call this 
machine 346a) and the other only has onboard SCSI (346b).


Both have two RAID1 software mirrors -- one for /boot (/dev/md0) and the 
other for lvm2 use (/dev/md1).


Both are running the same amd64 Debian release (Lenny).

346a will boot entirely without issues whatsoever, but 346b stops at a 
special initramfs sh after giving up on the lvm volume group (not found) ... 
from there I can activate the md0 and md1 mirrors and activate the lvm2 
logical volumes, I then exit the sh and boot continues as normal.


I've checked the kernel and module files for each machine, they are 100% 
identical.  I've checked all files in /boot and /boot/grub and the 
differences don't give me any clues.


I've even md5 check summed every file in /boot and disassembled the 
initramfs image files to compare them.  Every difference seems to be 
perfectly acceptable and explainable.


346a is running with 300GB SCSI drives, each set as a single drive on the 
hardware (IBM) RAID controller with software RAID in use.


346b is running with 73GB SCSI drives, no RAID controller -- but using 
software RAID as per 346a.


346b can have all drives / file system areas fully accessible via Ubuntu 
live CD (with addition of mdadm and lvm2, plus a little setup).  It is also 
fully accessible using Debian rescue from the installer (netinst) disk.  And 
as I mentioned above, it is recoverable from the initramfs sh environment, 
but it won't boot up without intervention.


I have since added debug to the cmdline and found that the issue is 
definitely due to a failure to activate the mirrors.


extract
+ /scripts/local-top/mdadm
Begin: LoadingSuccess: loaded module raid1.
done.
Begin: Assembling all MD arrays ... mdadm: No devices listed in conf file
were found.
Failure: failed to assemble all arrays.
done.
/extract

Inside the initramfs file system, the /etc/mdadm/mdadm.conf file looks 
fine -- it includes the correct details including the UUID of each mirror.


Kind Regards
AndrewM

Andrew McGlashan
Broadband Solutions now including VoIP


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