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Thread: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

  1. #1
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    Exclamation Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    I was running 11.04 as my main OS untill I installed Win Xp Pro. 50 GiB Ubuntu and 100 GiB Win Xp Pro. Now when ever I boot my computer (Acer Extensa 5620) it AUTOMATICALLY goes into the Win Xp Pro OS. So I have no idea how to access all of my Ubuntu files and programs etc. This is a really big problem as I have yet to hook up Win Xp Pro to the internet. It is an older OS and it has made things very difficult. So I really need to be able to switch OS partitions.

  2. #2
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    Re: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    When you installed XP, it automatically installed the windows boot loader to the MBR of the hard drive. You need to reinstall grub2's boot loader to the MBR and then run sudo update-grub to get windows added to the menu.

    How to restore the Ubuntu/XP/Vista/7 bootloader (Updated for Ubuntu 9.10 and later with grub2)
    http://ubuntuforums.org/showthread.php?t=1014708
    Reinstall grub2 - Short version & full chroot version
    https://help.ubuntu.com/community/Gr...ing%20GRUB%202

    If you need detailed help post this:

    Boot Info Script courtesy of forum members meierfra & Gert Hulselmans
    Page with instructions and download:
    http://bootinfoscript.sourceforge.net/
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    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.







  3. #3
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    Re: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    What does MBR stand for?

  4. #4
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    Re: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    Master Boot Record. nvm

  5. #5
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    Re: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    Just to expound on Shvesley's answer.

    MBR is how all BIOS based computers boot. (Macs & some very new computers now use EFI or UEFI which is a newer way.) MBR has been used since the start of PCs 25 years ago. Computer starts up and reads the onboard ROM (now EEPROM) which has the BIOS. BIOS checks what hardware you have and if a hard drive is found it will jump to the primary master or boot drive to continue to boot. Then your operating system starts to load. But MBR is tiny so in most cases it just jumps to somewhere else after a few check and then loads more code from a partition.

    http://en.wikipedia.org/wiki/Master_boot_record
    http://en.wikipedia.org/wiki/UEFI
    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.







  6. #6
    Join Date
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    Location
    New England
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    Re: Switching between partitions, Windows Xp Pro to Ubuntu 11.04

    Can I just say, this thread has helped me more times than I can count. Thank you so much!

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