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Thread: Parallel installation 10.3/11.0 using a software raid1

  1. #1
    Harald Schumacher NNTP User

    Default Parallel installation 10.3/11.0 using a software raid1

    I tried to install 11.0 in parallel on my 10.3 system. The system layout
    looks like this:

    /dev/sda1 69M /boot
    /dev/sda2 20G /
    /dev/sda3 2G swap
    /dev/sda4 443.6G md0
    /dev/sdb1 20G /boot
    /dev/sdb2 443.6G md0

    /dev/md0 443.6G /home

    The /home is on a raid1 and there is another 20 GB partition as the new /
    for 11.0. Starting the setup, I get from the partitioner the right
    information, but it show a RAID0 system without my 2 partition (sda4) for
    md0. I would like to use my /home in both installations, but I'm not able
    to change the RAID level.

    How can I change this level without formatting /home or how could I tell
    YAST the right RAID level?

    Thank you for any idea and best regards

    Harald

  2. #2
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    Default Re: Parallel installation 10.3/11.0 using a software raid1

    What does the 11.0 installer see regarding /dev/sda4 and /dev/sdb2. If both have type Linux RAID (hex FD I think), then what you have to do is use the Raid button to create an array containing those two partitions and assigned to /home with the right FS type, but do not format it.

    PS: I don't guarantee it, I've never tried to mix two distros using the same RAID, this just seems like the logical path, so backup /home first.

  3. #3
    Harald Schumacher NNTP User

    Default Re: Parallel installation 10.3/11.0 using a software raid1

    ken yap wrote:

    > What does the 11.0 installer see regarding /dev/sda4 and /dev/sdb2.

    /dev/sdb2 is seen as member of md0 RAID, but md0 is set to RAID0. sda4 is
    shown but without RAID.

    > If
    > both have type Linux RAID (hex FD I think), then what you have to do is
    > use the Raid button to create an array containing those two partitions
    > and assigned to /home with the right FS type, but do not format it.

    They are both of type Linux RAID, but if I remove the md0 and try to create
    it new the new md? partition is marked for formating, that the point when I
    stop for protecting my 10.3 /home.

    >
    > PS: I don't guarantee it, I've never tried to mix two distros using the
    > same RAID, this just seems like the logical path, so backup /home first.

    Yes ;-) it's already done but still I do not like the idea that I could not
    install in parallel. Normally, without RAID I always switch between two /
    partitions and keep one /home and it works perfect. I never update a
    version I use the new installation path and have only to worry about old
    stuff in my home directories.

    Regards

    Harald


  4. #4
    Harald Schumacher NNTP User

    Default Re: Parallel installation 10.3/11.0 using a software raid1

    Harald Schumacher wrote:

    Sorry this information is wrong!
    >
    > /dev/sda1 69M /boot
    > /dev/sda2 20G /
    > /dev/sda3 2G swap
    > /dev/sda4 443.6G md0
    > /dev/sdb1 20G /boot
    > /dev/sdb2 443.6G md0
    >
    > /dev/md0 443.6G /home


    This is the correct layout:
    /dev/sda1 69M /boot
    /dev/sda2 20G /(root10.3)
    /dev/sda3 2G swap
    /dev/sda4 443.6G md0
    /dev/sdb1 20G /(root11.0)
    /dev/sdb2 443.6G md0

    /dev/md0 443.6G /home


  5. #5
    Harald Schumacher NNTP User

    Default SOLVED: Parallel installation 10.3/11.0 using a software raid1

    Installing version 11 without the RAID works fine and after the first boot
    YaST recognized the RAID as RAID1 and I could mount my /home.

    Thank you fro your help

    Harald

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