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Thread: Installing 12.04 on WIndows Raid 0 HDD

  1. #1
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    Apr 2012
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    Installing 12.04 on WIndows Raid 0 HDD

    Ok I am completely lost =( Here have been my problems. Sorry if I am not too detailed, but I never expected it to be this difficult and I don't know a lot of the Linux jargon.

    So I first tried the desktop installer and when I got to the installation type screen after reboot nothing would show on the partition table. Found out this doesn't work.

    Tried the Live CD and it did the same thing.

    Finally got the alternate CD and was able to get past that part and set up my 25GB partition to be used for Ubuntu. Then I hit another wall when I got to the Grub2 install portion. It asked me where to install to and I put in every example it gave me and every possible partition and it kept coming back with an error saying it either didn't exist or couldn't be installed to that.

    I then continued the installation without Grub2 installed. I looked up how to manual boot and someone else did the same thing. It was suggested to use a Super Grub2 disc which I made after installation complete back in Windows. After booting up with the Grub2 disc I used the function to find any OS and it found Linux and I selected it.

    This is my new error. "ALERT! /dev/disk/by-uuid does not exist" then it goes to some cmd prompt and I have no idea what to do there. When I go back into windows, which is where I am now, I can see that the partition is filled with a 18.5GB and a 6.0GB. These were made out of the 25GB partition I made for the install.

    Any ideas what to do?

  2. #2
    Join Date
    Nov 2009
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    Ubuntu 12.04 Precise Pangolin

    Re: Installing 12.04 on WIndows Raid 0 HDD

    At the partitioning screen you needed to write down the exact device of the raid, like /dev/mapper/XXXXX_Volume0 or similar. When it asked where to install grub2 you need to enter exactly the same.

    I don't know what super grub did, sometimes it makes bigger mess, sometimes it helps.

    Boot into live mode of 12.04 and try this in terminal:
    sudo dmraid -ay

    That should activate your array. Then if you do:
    sudo fdisk -l (small L)

    does it list the raid device?
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

  3. #3
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    Thanks for the reply. I am going to try a reinstall and write down the partition name this time around. I figured Grub2 would just find space and install but I guess I was wrong to assume that.

  4. #4
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    Ubuntu 12.04 Precise Pangolin

    Re: Installing 12.04 on WIndows Raid 0 HDD

    Be careful, you need to note the array device, not the actual partition.

    So, for example, if the raid device is /dev/mapper/XXXX_Volume0
    and the partitions: /dev/mapper/XXXX_Volume0p1, /dev/mapper/XXXX_Volume0p5, etc

    You need to install onto Volume0, the whole device, not to a single partition. Make sure you get it right.

    If you want to try, you can add grub2 without reinstalling ubuntu, but that's up to you.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

  5. #5
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    I went ahead and deleted the previous install and tried again. I manully made the partitions for primary and swap. The name for my Raid 0 primary partiition is md126p3, but grub will not install to that. I am getting an error: Unable to install GRUB in /dev/md126p3. Executing 'grub-install /dev/md126p3' failed. This is a fatal error

    It is partition #3 for the primary Ubuntu OS and Partition #4 for swap and it says #126 above my Volume0 drive.

    On this drive it reads:

    RAID0 device #126 - 600.1 GB Linux Software RAID Array
    #1 Primary 104.9MB NTFS (Windows)
    #2 Primary 571.7GB NTFS (Windows Storage)
    #3 Primary 16.00GB K ext4 /
    #4 Primary 12.30GB K swap swap


    Would it be better for me to just continue the installation and repair GRUB afterwards? I am using the alternate CD since the Live/Desktop versions wouldn't detect my RAID0 at all. Do I need to load up the Live CD afterwards and repair GRUB then?

  6. #6
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    Something is messed up here. It says it's Linux Software RAID, not fakeraid. Windows can't install on linux software raid, it can't understand it. How would you have windows installed there?

    Is it possible that this is some kind of windows software raid that ubuntu is trying to interpret as software raid also?

    That's why the device is not /dev/mapper/.... because this is not fakeraid at all.

    And don't try to install grub onto the partition, try it on the device, like /dev/md126. But I don't think this would work.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

  7. #7
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    The RAID I have is what I already have Windows installed on. I made the Raid in Bios and then installed Windows on it. I then went into disk management and partitioned ~26GB of free space on the RAID HDD's to use for Linux.

    I then put the CD in and started the installation for Ubuntu. The only thing I could find that led me up to this part is A) Use alternate install for RAID devices B) Make space on drive for Ubuntu to install on. Other then that I have pretty much been following the prompt during the install.

    It definitely isn't a "fake raid" it is a real RAID with two drives.

  8. #8
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    The fakeraid is the common term for bios raid (motherboard raid). This is because there is no dedicated raid card with its own cpu and memory, so it's called fake.

    The fakeraid devices are named /dev/mapper/....
    The linux software raid devices are named /dev/mdX but as far as I have seen, windows doesn't recognize them.

    I don't know how this happened but it shouldn't be like this with bios raid. And I think this is your problem.

    Is the windows device brand new or you already have data and programs on it? If it's new, are you willing to try this:
    1. Go into the raid bios, and delete this array. Then create a new array again.
    2. Install windows taking just the space you plan for it. Leave the rest of the raid array not partitioned.
    3. Don't try to install ubuntu. Boot into live mode with the live cd and see if it recognizes the raid device there. You can check with fdisk, parted, and Gparted.

    Let us know the result. The result we are looking for is a /dev/mapper/.... device, not /dev/mdX.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

  9. #9
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    Re: Installing 12.04 on WIndows Raid 0 HDD

    I was afraid of having to do this, but let me back up a few more things before I do it. Will post results in a bit.

    What I am using for the RAID set up is Intel matrix Storage Manager Option ROM
    ICH1OR w/Raid5

    I think it is part of my ASUS mobo.
    Last edited by commiedic; April 29th, 2012 at 10:25 PM.

  10. #10
    Join Date
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    Ubuntu 11.04 Natty Narwhal

    Re: Installing 12.04 on WIndows Raid 0 HDD

    For my machines with RAID on the motherboard, I've really never figured out Dual Boot with being able to see the RAID array in both systems. I would dedicate a separate hard drive to install Ubuntu on or consider a Virtual machine like Virtual Box with Ubuntu running inside.

    This is on an AMD 6-Core system. The motherboard RAID drivers are published by AMD / MOBO manufacturer (BIOSTAR). I could find no equivalent Ubuntu RAID drivers when I checked last time.

    My suggestion would be to quit banging your head against a wall and decide to use the RAID setup in one OS or the other. Typically, you will only be able to use the RAID in Windows if you set up the array in the BIOS and then install the Windows Drivers to see the RAID array in Windows as that is the driver base they gear the hardware for. Many times, an equivalent Linux driver is completely missing in action.

    And these motherboard RAID controllers have been completely unreliable in RAID5,6,10 configurations and I would wholeheartedly recommend you not use such a setup in any OS without getting a beefier and more reliable PCI Express RAID 5 controller with true RAID.

    If you want to save yourself a whole bunch of time, aggravation, and problems, please buy a high quality dedicated RAID controller card and some enterprise level hard drives to go along with it. Anything else and you are probably going to be disappointed.

    Just my two cents from having been there and done that. Few motherboard controllers have good Linux drivers that are also compatible that have Windows equivalents.

    If you're really gutsy and you have AMD motherboard with on-board RAID try here:

    http://wwwd.amd.com/AMD/devsite.nsf/...s?opendocument
    Last edited by cejack; April 29th, 2012 at 10:57 PM. Reason: Added information

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