RAID Konfiguration FAI

[Alex Mestiashvili]

On 11/03/2011 10:35 AM, Julian Decker wrote:
> Hi and thanks to all,
>
> unfortunately the "-e 1.0" option did not solve the problem.
>
> I now tried the following config:
>
> ---------------------------------------------------------------------------------
> disk_config sda
> primary  -        10000  -       -
> primary  -        10000  -       -
>
> disk_config sdb
> primary  -        10000  -       -
> primary  -        10000  -       -
>
> disk_config raid
> raid1  /          sda1,sdb1 ext3    rw   mdcreateopts="-e 1.0"
> raid1  swap  sda2,sdb2  swap  sw  mdcreateopts="-e 1.0"
> ---------------------------------------------------------------------------------
>
> mdadm is now called whith the -e option:
>
> ...
> Executing: yes | mdadm --create -e 1.0 /dev/md0 --level=raid1 --force
> --run --id-devices=2 /dev/sda1 /dev/sdb1
> [ 54.028489] raid1: md0 is not clean -- starting background reconstruction
> Executing: mdfs.ext3 /dev/md0
> Executing: yes | mdadm --create -e 1.0 /dev/md1 --level=raid1 --force
> --run --id-devices=2 /dev/sda2 /dev/sdb2
> [ 54.028489] raid1: md1 is not clean -- starting background reconstruction
> Executing: mkswap /dev/md1
> Executing: fai-vol_id -u /dev/md1
> Executing: fai-vol_id -u /dev/md1
> Executing: fai-vol_id -u /dev/md0
> Executing: fai-vol_id -u /dev/md0
> ...
>
> Creation of raid devices does work, after FAI installation I was able
> to mount them, fstab looks good too.
>
> I use Debian 6.0.3 and Grub2 1.98 at the moment.
>
>
> regards
>
>
>  
>
>> ----- Original Message -----
>>
>> From: Michael Tautschnig
>>
>> Sent: 10/31/11 08:09 PM
>>
>> To: linux-fai at uni-koeln.de
>>
>> Subject: Re: RAID Konfiguration FAI
>>
>>
>>  
>> Hi all, 
>>
>> I hope sticking with English is ok with everyone. Otherwise please just drop a 
>> brief note here. 
>>
>> > On 10/28/2011 12:46 PM, Julian Decker wrote: 
>> > > Hallo, 
>> > > 
>> > > ich versuche mich derzeit an der Konfiguration eines softRAIDs und 
>> > > habe damit leider Schwierigkeiten. 
>> > > Zunächst habe ich offensichtlich den Fehler gemacht, die boot 
>> > > Partition (Kernel) in das RAID zu legen, was anscheinend nicht möglich 
>> > > ist, da der Kernel (und in Folge mdadm) zuerst geladen werden muss um 
>> > > überhaupt das softRAID ansprechen zu können - das leuchtet mir ja 
>> > > soweit ein. 
>> > > Ich habe nun die boot Partition außerhalb des RAIDs angelegt und nun 
>> > > kann das System zwar den MBR finden und den Bootloader (Grub) laden, 
>> > > allerdings findet dieser die root Partition nicht. 
>> > > Braucht Grub für die Verwendung des RAIDs eine spezielle Konfiguration? 
>> > > 
>>
>> Which version of Grub is that (and which Debian release is it)? 
>>
>> [...] 
>> > 
>> > The problem is superblock version 1.2 
>> > 
>> > having superbloc v1.0 solves the problem with grub and raid1 
>> > 
>> > I have added metadata=1.0 to the mdadm.conf in the nfsroot 
>> > and that solved the problem with bootable raid1 
>> > 
>> > cat /srv/fai/nfsroot/live/filesystem.dir/etc/mdadm/mdadm.conf | grep 
>> > metadata 
>> > CREATE owner=root group=disk mode=0660 auto=yes metadata=1.0 
>> > 
>>
>> This thus seems to be a recurrence (which new metadata versions) of 
>>
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=570117 
>>
>> Note that fiddling with mdadm.conf shouldn't be necessary - just use 
>> mdcreatopts="-e 1.0" in the raid1 ... line of the disk_config file. 
>>
>> Best, 
>> Michael
>
>  
>

Could it be that the problem is the missing bootable option ?

Also note that you need mdcreateopts="-e 1.0" only for the "/" partition ...
other partitions can have superblock 1.2 imho .

here is my config which worked for me :

disk_config sda bootable:1
primary  -      25G      -               -
primary  -      10G      -               -
logical  -      20G-     -               -

disk_config sdb bootable:1
primary  -      25G      -               -
primary  -      10G      -               -
logical  -      20G-     -               -


disk_config raid

raid1   /       sda1,sdb1  ext3    rw,errors=remount-ro
raid1   swap    sda2,sdb2       swap    sw
raid1   /data_local  sda5,sdb5  xfs    rw,noatime


Best regards ,
Alex
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