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Thread: New Install Won't Boot.

  1. #1
    Join Date
    Sep 2011
    Beans
    64

    New Install Won't Boot.

    Hi - I have a desktop which used to have a dual boot xp / Ubuntu. I don't want the xp and I want to reclaim the space for Ubuntu. The disk had been logically divided into /dev/sda and dev/sdb. I ran DBAN on it to clean everything out.

    When I go to install I still see 2 logical drives sda (250GB) and sdb (500GB)

    I make sda swap and sdb root /

    I nominate the sdb as the boot disc.

    Ubuntu appears to install fine, however, then I go to restart and nothing ... just a blinking cursor.

    Ok - so I have to admit that I was unsure what to do in terms of specifying swap and root.

    I have specified sdb as "boot", and when I look again now with a live install disc into the drive it is indeed flagged as "boot"

    In a perfect world I would prefer to somehow remove one of the logical drives so that I can have just 1 drive of 750GB back. But I do not have windows disk, and I have Googled to death how to do that without result.

    I'm quite confused the best way forward.

    MANY Thanks for all you advice !
    Last edited by vincej; April 4th, 2014 at 12:25 AM. Reason: correction

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: New Install Won't Boot.

    If drives are sda & sdb, that is not logical drives, but two actual physical drives.

    If Ubuntu installed correctly you may have grub boot loader in the MBR of the other drive. Have you in BIOS tried booting sda, or sdb?
    Grub does not use boot flag. But some BIOS will not let you boot without one, so we suggest a boot flag on a primary partition on every hard drive.

    You normally only need / (root) of 20 or 25GB, swap equal to RAM in GiB if you want to hibernate or 2or 3GB otherwise if you have lots of RAM and do not hibernate.

    Then rest of drive(s) and partitions can be /home or data partitions. I use data partitions and a partition on the other drive for short term backup.

    https://help.ubuntu.com/community/SwapFaq

    May be best to see details.

    Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
    https://help.ubuntu.com/community/Boot-Repair
    You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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