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Thread: Dual boot not working (ubuntu NBR Alpha3 + Windows7)

  1. #1
    Join Date
    Mar 2010

    Exclamation Dual boot not working (ubuntu NBR Alpha3 + Windows7)

    hi i ve recently installed Ubuntu 10.04 Alpha-3 Netbook remix on my eeepc which was running wih windows 7 on it . installation of ubuntu was successful and it worked well , but when i choose "windows 7 (loader) (on /dev/sda1 )" from grub menu it gave me error saying "
    windows failed to start. A recent hardware or software change might be the cause . to fix the problem:
    <repair bla bla bla>

    status: 0xc000000f
    info: The boot selection failed because a required device is inaccessible

    additional info:
    Device Boot Start End Blocks Id System
    /dev/sda1 * 1 13 102400 7 HPFS/NTFS
    Partition 1 does not end on cylinder boundary
    /dev/sda2 13 3134 25063424 83 Linux
    /dev/sda3 3134 8616 44040192 6 FAT16
    /dev/sda4 8616 19458 87081984 7 HPFS/NTFS
    Partition 4 does not end on cylinder boundary
    any way to get dual boot working ?

  2. #2
    Join Date
    Jul 2005
    Hughenden, Australia
    Ubuntu 14.04 Trusty Tahr

    Re: Dual boot not working (ubuntu NBR Alpha3 + Windows7)

    Did you resize the Windows7 partition with a partition editing program?
    Either the Windows7 disk management utility or the partition editor in the Ubuntu installer can resize a Windows 7 partition without moving the Windows 7 boot sector.
    You can also resize a Windows 7 partition safely with GParted, but you must remove the uncheck the box for 'align partition to cylinder boundaries.

    Most Windows 7 partitions are supposed to start in sector number 2048, if you run 'sudo fdisk -lu' you'll be able to tell, but 'sudo fdisk -l' only shows which cylinder it starts in.
    Probably it should start in about cylinder 32 1/2, unless EeePC installations of Windows 7 are different. Yours starts in cylinder 1 according to your fdisk output.

    Does your EeePC has a CD drive?
    I guess probably not, but if it does your can easily run 'Startup Repair' from your Windows 7 Installation DVD and fix the boot loader automatically.
    Ubuntu user since 2004 (Warty Warthog)


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