Results 1 to 10 of 24

Thread: UEFI 12.04_AMD64 - Win7 dual boot problems

Threaded View

  1. #1
    Join Date
    May 2006
    Beans
    Hidden!
    Distro
    Xubuntu 12.04 Precise Pangolin

    UEFI dual boot trouble: Win7x64 - Ubuntu 12.04 LTS amd64

    I'm trying to create a dual boot system. I bought new hardware with Win7 64bit (a UEFI capable BIOS but with a System Reserved boot partition) pre-installed. I repartitioned my drive (with gparted) and did a fresh install of Ubuntu desktop 12.04 amd64 LTS with the live CD.

    During installation I selected to install Grub into the MBR of sda (the alternative options sda1-sda9 made no sense to me). Now my computer still boots straigt into Windows. I've been reading up on UEFI-GTP for a day, but things are getting more fuzzy than clear. I'm new to UEFI and GPT, is there a simple and safe solution to make this dual boot work?

    I attached bootinfo-script results (ignore thumbdrive sdd) and grub entries from the install syslog file to this question. Any help would be much appreciated.

    Here's a quick overview of sda:
    Code:
    (parted) print 
    Model: ATA WDC WD10EADX-22T (scsi)
    Disk /dev/sda: 1000GB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    
    Number  Start   End     Size    Type      File system     Flags
     1      1049kB  16.1GB  16.1GB  primary   ntfs            diag
     2      16.1GB  16.2GB  105MB   primary   ntfs            boot
     3      16.2GB  177GB   161GB   primary   ntfs
     4      177GB   1000GB  823GB   extended
     5      177GB   182GB   5046MB  logical   ntfs
     6      182GB   189GB   6443MB  logical   linux-swap(v1)
     7      189GB   242GB   53.7GB  logical   ext4
     8      242GB   247GB   5046MB  logical   ext4
     9      248GB   1000GB  753GB   logical   ntfs
    
    
    Drive: sda _____________________________________________________________________
    
    Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    
    Partition  Boot  Start Sector    End Sector  # of Sectors  Id System
    
    /dev/sda1               2,048    31,459,327    31,457,280  27 Hidden NTFS (Recovery Environment)  [OEM recovery partition]
    /dev/sda2    *     31,459,328    31,664,127       204,800   7 NTFS / exFAT / HPFS                 [Appearantly the Win7x64 boot loader partition]
    /dev/sda3          31,664,128   346,236,927   314,572,800   7 NTFS / exFAT / HPFS                 [Win7x64 installation/system partition]
    /dev/sda4         346,236,928 1,953,523,711 1,607,286,784   5 Extended                            [Container for logical partitions]
    /dev/sda5         346,238,976   356,093,951     9,854,976   7 NTFS / exFAT / HPFS                 [Data partition]
    /dev/sda6         356,096,000   368,680,959    12,584,960  82 Linux swap / Solaris                [Linux swap partition]
    /dev/sda7         368,683,008   473,540,607   104,857,600  83 Linux                               [Ubuntu 12.04 root partition]
    /dev/sda8         473,542,656   483,397,631     9,854,976  83 Linux                               [Linux /home partition]
    /dev/sda9         483,399,680 1,953,523,711 1,470,124,032   7 NTFS / exFAT / HPFS                 [Data partition]
    I did some further digging and what happened here?
    Code:
    # gdisk /dev/sda
    GPT fdisk (gdisk) version 0.8.1
    
    Partition table scan:
      MBR: MBR only
      BSD: not present
      APM: not present
      GPT: not present
    
    
    ***************************************************************
    Found invalid GPT and valid MBR; converting MBR to GPT format.
    THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by typing 'q' if
    you don't want to convert your MBR partitions to GPT format!
    ***************************************************************
    Could this be the result of grub from the live CD trying to install itself in the MBR of sda?
    Should / can I fix this?

    Here's the solution.
    Attached Files Attached Files
    Last edited by martinr; June 16th, 2012 at 09:19 AM. Reason: Added link to solution
    To fail to prepare is to prepare to fail.

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •