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Thread: Fresh install not adding MSDOS7 partition to grub menu

  1. #1
    Join Date
    Dec 2007
    Beans
    103

    Fresh install not adding MSDOS7 partition to grub menu

    I did a fresh install. I have both Windows XP and MSDOS7 as primary boot partitions and Ubuntu in extended partition. Windows XP was added to grub menu, DOS was not. The instructions I found on-line do not seem to work. Does anybody have the entry they created to make DOS boot with the grub found on 12.04 LTS?

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

    Re: Fresh install not adding MSDOS7 partition to grub menu

    I have not booted DOS since DOS days. But boot entry should be same chainload entry. Grub2's os-prober is probably not set to look for FAT partition with DOS.

    Boot Repair:
    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.

    This is my entry, my UUID is optional if set root is correct and only if booting from a different drive might you need the drivemap command.
    menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
    insmod ntfs
    insmod part_msdos
    set root=(hd0,1)
    search --no-floppy --fs-uuid --set 04b05b70b05b6768
    drivemap -s (hd0) ${root}
    chainloader +1
    }

    For dos you may need insmod fat

    menuentry "DOS (on /dev/sda2)" {
    insmod fat
    insmod part_msdos
    set root=(hd0,2)
    chainloader +1
    }
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
    Join Date
    Dec 2007
    Beans
    103

    Re: Fresh install not adding MSDOS7 partition to grub menu

    Thanks,

    boot-repair uses a different probe and found the partition.

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