Ubuntu: Installing Ubuntu 14.04 on Asus Zenbook (RAID)


This machine have 2 128 GB SSD drives (http://www.amazon.com/dp/B00EPGHE0E/ref=twister_B00JYFOKKS).

I managed to install Ubuntu with no problems on one SSD drive, but I am having following troubles with RAID setup. Here is the details:

  • I boot from live USB (try Ubuntu option).
  • Install mdadm: sudo apt-get install mdadm.
  • Create RAID:

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  • Run installer:

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  • It fails to install GRUB:

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I also tried to install grub manually after installer failed:

  • I looked how RAID is partinitioned:

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  • Added BIOS Boot partinition:

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  • Tried to install GRUB:

    $ sudo mount /dev/md127p4 /mnt

    $ sudo mount /dev/md127p1 /mnt/boot

    $ sudo grub-install --root-directory=/mnt /dev/md/127

    Installing for i386-pc platform.

    grub-install: error: diskfilter writes are not supported.

  • Tried solutions proposed in Diskfilter writes are not supported > What triggers this error? but still same error.


I tried with alternate install image, following this video https://www.youtube.com/watch?v=-x2rZe2Z9as, but, after reboot there are no boot options, BIOS opens without any boot option. I had a boot partition on /dev/sda, GRUB was installed on it, but was unable to boot for some reason.


The BIOS boot partition(s) must be created on the disk(s) not the RAID device.

One BIOS boot partition is enough for you as your system won't boot with one disk only.

Linux soft RAID works on partitions, not drives. So you'll have to create one partition for the BIOS boot and one for the RAID.

You could have to create a third partition. /boot can be on RAID 1, can't be on RAID 5, and I'm not sure about RAID 0 but it probably can't.


Did you try Lubuntu installer which still provide alternate ISO image to properly setup RAID ?


I guess you already wiped all Windows related partitions to start clean right ?


Finally managed to install Ubuntu on RAID 0 and UEFI/GPT system, steps below:

sudo -s  apt-get -y install mdadm  apt-get -y install grub-efi-amd64  sgdisk -z /dev/sda  sgdisk -z /dev/sdb  sgdisk -n 1:0:+100M -t 1:ef00 -c 1:"EFI System" /dev/sda  sgdisk -n 2:0:+8G -t 2:fd00 -c 2:"Linux RAID" /dev/sda  sgdisk -n 3:0:0 -t 3:fd00 -c 3:"Linux RAID" /dev/sda  sgdisk /dev/sda -R /dev/sdb -G  mkfs.fat -F 32 /dev/sda1  mkdir /tmp/sda1  mount /dev/sda1 /tmp/sda1  mkdir /tmp/sda1/EFI  umount /dev/sda1    mdadm --create /dev/md0 --level=0 --raid-disks=2 /dev/sd[ab]2  mdadm --create /dev/md1 --level=0 --raid-disks=2 /dev/sd[ab]3    sgdisk -z /dev/md0  sgdisk -z /dev/md1  sgdisk -N 1 -t 1:8200 -c 1:"Linux swap" /dev/md0  sgdisk -N 1 -t 1:8300 -c 1:"Linux filesystem" /dev/md1    ubiquity -b    mount /dev/md1p1 /mnt  mount -o bind /dev /mnt/dev  mount -o bind /dev/pts /mnt/dev/pts  mount -o bind /sys /mnt/sys  mount -o bind /proc /mnt/proc  cat /etc/resolv.conf >> /mnt/etc/resolv.conf  chroot /mnt    nano /etc/grub.d/10_linux  # change quick_boot and quiet_boot to 0    apt-get install -y grub-efi-amd64  apt-get install -y mdadm    nano /etc/mdadm/mdadm.conf   # remove metadata and name    update-grub    mount /dev/sda1 /boot/efi  grub-install --boot-directory=/boot --bootloader-id=Ubuntu --target=x86_64-efi --efi-directory=/boot/efi --recheck  update-grub  umount /dev/sda1    dd if=/dev/sda1 of=/dev/sdb1    efibootmgr -c -g -d /dev/sdb -p 1 -L "Ubuntu #2" -l '\EFI\Ubuntu\grubx64.efi'    exit # from chroot  exit # from sudo -s  reboot  


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