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Thread: grub/os-prober can't find Windows 7 installation

  1. #1
    Join Date
    Nov 2011
    Beans
    2

    grub/os-prober can't find Windows 7 installation

    I'm trying to figure out why neither update-grup nor os-prober can find the Windows 7 installation on my system. This system was functioning fine for three years with a single hard drive and Windows 7 installed in a standard MBR/BIOS setup.

    I've added another hard disk, installed Ubuntu 14.04 to that hard disk in a GPT/UEFI configuration. Both OSes boot and run fine, if I select the appropriate hard disk in the BIOS. (ASUS UEFI BIOS).

    Now I want to use grub to select OS at boot, but can't get it to configure that. Based on read the many other posts here on the topic, I have run a chkdsk /F on the Windows install, been careful to shut is down cleanly (not hibernate) and used gparted to verify the boot flag is on the Windows partition.

    Here are the results of bootinfoscript:

    Code:
                      Boot Info Script 0.61      [1 April 2012]
    
    
    
    
    ============================= Boot Info Summary: ===============================
    
    
     => No boot loader is installed in the MBR of /dev/sda.
     => Windows is installed in the MBR of /dev/sdb.
    
    
    sda1: __________________________________________________________________________
    
    
        File system:       vfat
        Boot sector type:  FAT32
        Boot sector info:  No errors found in the Boot Parameter Block.
        Operating System:  
        Boot files:        
    
    
    sda2: __________________________________________________________________________
    
    
        File system:       ext2
        Boot sector type:  -
        Boot sector info: 
        Operating System:  
        Boot files:        /grub/grub.cfg
    
    
    sda3: __________________________________________________________________________
    
    
        File system:       LVM2_member
        Boot sector type:  -
        Boot sector info: 
    
    
    sdb1: __________________________________________________________________________
    
    
        File system:       ntfs
        Boot sector type:  Windows Vista/7: NTFS
        Boot sector info:  No errors found in the Boot Parameter Block.
        Operating System:  
        Boot files:        /bootmgr /Boot/BCD
    
    
    sdb2: __________________________________________________________________________
    
    
        File system:       ntfs
        Boot sector type:  Windows Vista/7: NTFS
        Boot sector info:  No errors found in the Boot Parameter Block.
        Operating System:  Windows 7
        Boot files:        /Windows/System32/winload.exe
    
    
    ubuntu-vg-root': _______________________________________________________________
    
    
        File system:       
        Boot sector type:  Unknown
        Boot sector info: 
        Mounting failed:   mount: unknown filesystem type ''
    
    
    ubuntu-vg-swap_1': _____________________________________________________________
    
    
        File system:       
        Boot sector type:  Unknown
        Boot sector info: 
        Mounting failed:   mount: unknown filesystem type ''
    mount: unknown filesystem type ''
    
    
    ============================ Drive/Partition Info: =============================
    
    
    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                   1 1,953,525,167 1,953,525,167  ee GPT
    
    
    
    
    GUID Partition Table detected.
    
    
    Partition    Start Sector    End Sector  # of Sectors System
    /dev/sda1           2,048     1,050,623     1,048,576 EFI System partition
    /dev/sda2       1,050,624     1,550,335       499,712 Data partition (Linux)
    /dev/sda3       1,550,336 1,953,523,711 1,951,973,376 Logical Volume Manager (LVM) partition (Linux)
    
    
    Drive: sdb _____________________________________________________________________
    
    
    Disk /dev/sdb: 750.2 GB, 750156374016 bytes
    255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 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/sdb1    *          2,048       206,847       204,800   7 NTFS / exFAT / HPFS
    /dev/sdb2             206,848 1,465,143,295 1,464,936,448   7 NTFS / exFAT / HPFS
    
    
    
    
    "blkid" output: ________________________________________________________________
    
    
    Device           UUID                                   TYPE       LABEL
    
    
    /dev/mapper/ubuntu--vg-root 8dd3eb20-2e64-461c-95b8-3091700774db   ext4       
    /dev/mapper/ubuntu--vg-swap_1 33910369-8e39-4a2f-adda-eccf5257511c   swap       
    /dev/sda1        D839-4ECB                              vfat       
    /dev/sda2        8506e4f0-d1dc-4d7c-8273-79364f7b1825   ext2       
    /dev/sda3        vxCrMI-FK4A-HClR-wRvl-kS77-b20z-RTqM44 LVM2_member 
    /dev/sdb1        AE18F3B318F378A3                       ntfs       System Reserved
    /dev/sdb2        9442F4A042F487EE                       ntfs       
    
    
    ========================= "ls -R /dev/mapper/" output: =========================
    
    
    /dev/mapper:
    control
    ubuntu--vg-root
    ubuntu--vg-swap_1
    
    
    ================================ Mount points: =================================
    
    
    Device           Mount_Point              Type       Options
    
    
    /dev/mapper/ubuntu--vg-root /                        ext4       (rw,errors=remount-ro)
    /dev/sda1        /boot/efi                vfat       (rw)
    /dev/sda2        /boot                    ext2       (rw)
    /dev/sdb2        /media/sgfallows/9442F4A042F487EE fuseblk    (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)
    
    
    
    
    ============================= sda2/grub/grub.cfg: ==============================
    
    
    --------------------------------------------------------------------------------
    #
    # DO NOT EDIT THIS FILE
    #
    # It is automatically generated by grub-mkconfig using templates
    # from /etc/grub.d and settings from /etc/default/grub
    #
    
    
    ### BEGIN /etc/grub.d/00_header ###
    if [ -s $prefix/grubenv ]; then
      set have_grubenv=true
      load_env
    fi
    if [ "${next_entry}" ] ; then
       set default="${next_entry}"
       set next_entry=
       save_env next_entry
       set boot_once=true
    else
       set default="0"
    fi
    
    
    if [ x"${feature_menuentry_id}" = xy ]; then
      menuentry_id_option="--id"
    else
      menuentry_id_option=""
    fi
    
    
    export menuentry_id_option
    
    
    if [ "${prev_saved_entry}" ]; then
      set saved_entry="${prev_saved_entry}"
      save_env saved_entry
      set prev_saved_entry=
      save_env prev_saved_entry
      set boot_once=true
    fi
    
    
    function savedefault {
      if [ -z "${boot_once}" ]; then
        saved_entry="${chosen}"
        save_env saved_entry
      fi
    }
    function recordfail {
      set recordfail=1
      if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
    }
    function load_video {
      if [ x$feature_all_video_module = xy ]; then
        insmod all_video
      else
        insmod efi_gop
        insmod efi_uga
        insmod ieee1275_fb
        insmod vbe
        insmod vga
        insmod video_bochs
        insmod video_cirrus
      fi
    }
    
    
    if [ x$feature_default_font_path = xy ] ; then
       font=unicode
    else
    insmod part_gpt
    insmod lvm
    insmod ext2
    set root='lvmid/eayxQH-Rgxf-O5zo-J3VX-al8c-x8dT-UfotQn/6PkO1o-641f-6aHx-AwaC-1xS2-CCfu-Qfiv6T'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint='lvmid/eayxQH-Rgxf-O5zo-J3VX-al8c-x8dT-UfotQn/6PkO1o-641f-6aHx-AwaC-1xS2-CCfu-Qfiv6T'  8dd3eb20-2e64-461c-95b8-3091700774db
    else
      search --no-floppy --fs-uuid --set=root 8dd3eb20-2e64-461c-95b8-3091700774db
    fi
        font="/usr/share/grub/unicode.pf2"
    fi
    
    
    if loadfont $font ; then
      set gfxmode=auto
      load_video
      insmod gfxterm
      set locale_dir=$prefix/locale
      set lang=en_US
      insmod gettext
    fi
    terminal_output gfxterm
    if [ "${recordfail}" = 1 ] ; then
      set timeout=30
    else
      if [ x$feature_timeout_style = xy ] ; then
        set timeout_style=hidden
        set timeout=0
      # Fallback hidden-timeout code in case the timeout_style feature is
      # unavailable.
      elif sleep --interruptible 0 ; then
        set timeout=0
      fi
    fi
    ### END /etc/grub.d/00_header ###
    
    
    ### BEGIN /etc/grub.d/05_debian_theme ###
    set menu_color_normal=white/black
    set menu_color_highlight=black/light-gray
    if background_color 44,0,30,0; then
      clear
    fi
    ### END /etc/grub.d/05_debian_theme ###
    
    
    ### BEGIN /etc/grub.d/10_linux ###
    function gfxmode {
        set gfxpayload="${1}"
        if [ "${1}" = "keep" ]; then
            set vt_handoff=vt.handoff=7
        else
            set vt_handoff=
        fi
    }
    if [ "${recordfail}" != 1 ]; then
      if [ -e ${prefix}/gfxblacklist.txt ]; then
        if hwmatch ${prefix}/gfxblacklist.txt 3; then
          if [ ${match} = 0 ]; then
            set linux_gfx_mode=keep
          else
            set linux_gfx_mode=text
          fi
        else
          set linux_gfx_mode=text
        fi
      else
        set linux_gfx_mode=keep
      fi
    else
      set linux_gfx_mode=text
    fi
    export linux_gfx_mode
    menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-8dd3eb20-2e64-461c-95b8-3091700774db' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt2'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  8506e4f0-d1dc-4d7c-8273-79364f7b1825
        else
          search --no-floppy --fs-uuid --set=root 8506e4f0-d1dc-4d7c-8273-79364f7b1825
        fi
        linux    /vmlinuz-3.19.0-33-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro  quiet splash $vt_handoff
        initrd    /initrd.img-3.19.0-33-generic
    }
    submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-8dd3eb20-2e64-461c-95b8-3091700774db' {
        menuentry 'Ubuntu, with Linux 3.19.0-33-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-33-generic-advanced-8dd3eb20-2e64-461c-95b8-3091700774db' {
            recordfail
            load_video
            gfxmode $linux_gfx_mode
            insmod gzio
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  8506e4f0-d1dc-4d7c-8273-79364f7b1825
            else
              search --no-floppy --fs-uuid --set=root 8506e4f0-d1dc-4d7c-8273-79364f7b1825
            fi
            echo    'Loading Linux 3.19.0-33-generic ...'
            linux    /vmlinuz-3.19.0-33-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro  quiet splash $vt_handoff
            echo    'Loading initial ramdisk ...'
            initrd    /initrd.img-3.19.0-33-generic
        }
        menuentry 'Ubuntu, with Linux 3.19.0-33-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-33-generic-recovery-8dd3eb20-2e64-461c-95b8-3091700774db' {
            recordfail
            load_video
            insmod gzio
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  8506e4f0-d1dc-4d7c-8273-79364f7b1825
            else
              search --no-floppy --fs-uuid --set=root 8506e4f0-d1dc-4d7c-8273-79364f7b1825
            fi
            echo    'Loading Linux 3.19.0-33-generic ...'
            linux    /vmlinuz-3.19.0-33-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset 
            echo    'Loading initial ramdisk ...'
            initrd    /initrd.img-3.19.0-33-generic
        }
        menuentry 'Ubuntu, with Linux 3.19.0-25-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-25-generic-advanced-8dd3eb20-2e64-461c-95b8-3091700774db' {
            recordfail
            load_video
            gfxmode $linux_gfx_mode
            insmod gzio
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  8506e4f0-d1dc-4d7c-8273-79364f7b1825
            else
              search --no-floppy --fs-uuid --set=root 8506e4f0-d1dc-4d7c-8273-79364f7b1825
            fi
            echo    'Loading Linux 3.19.0-25-generic ...'
            linux    /vmlinuz-3.19.0-25-generic root=/dev/mapper/ubuntu--vg-root ro  quiet splash $vt_handoff
            echo    'Loading initial ramdisk ...'
            initrd    /initrd.img-3.19.0-25-generic
        }
        menuentry 'Ubuntu, with Linux 3.19.0-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-25-generic-recovery-8dd3eb20-2e64-461c-95b8-3091700774db' {
            recordfail
            load_video
            insmod gzio
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  8506e4f0-d1dc-4d7c-8273-79364f7b1825
            else
              search --no-floppy --fs-uuid --set=root 8506e4f0-d1dc-4d7c-8273-79364f7b1825
            fi
            echo    'Loading Linux 3.19.0-25-generic ...'
            linux    /vmlinuz-3.19.0-25-generic root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset 
            echo    'Loading initial ramdisk ...'
            initrd    /initrd.img-3.19.0-25-generic
        }
    }
    
    
    ### END /etc/grub.d/10_linux ###
    
    
    ### BEGIN /etc/grub.d/20_linux_xen ###
    
    
    ### END /etc/grub.d/20_linux_xen ###
    
    
    ### BEGIN /etc/grub.d/20_memtest86+ ###
    ### END /etc/grub.d/20_memtest86+ ###
    
    
    ### BEGIN /etc/grub.d/30_os-prober ###
    ### END /etc/grub.d/30_os-prober ###
    
    
    ### BEGIN /etc/grub.d/30_uefi-firmware ###
    ### END /etc/grub.d/30_uefi-firmware ###
    
    
    ### BEGIN /etc/grub.d/40_custom ###
    # This file provides an easy way to add custom menu entries.  Simply type the
    # menu entries you want to add after this comment.  Be careful not to change
    # the 'exec tail' line above.
    ### END /etc/grub.d/40_custom ###
    
    
    ### BEGIN /etc/grub.d/41_custom ###
    if [ -f  ${config_directory}/custom.cfg ]; then
      source ${config_directory}/custom.cfg
    elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
      source $prefix/custom.cfg;
    fi
    ### END /etc/grub.d/41_custom ###
    --------------------------------------------------------------------------------
    
    
    =================== sda2: Location of files loaded by Grub: ====================
    
    
               GiB - GB             File                                 Fragment(s)
    
    
    
    
    ======================== Unknown MBRs/Boot Sectors/etc: ========================
    
    
    Unknown BootLoader on ubuntu-vg-root'
    
    
    
    
    Unknown BootLoader on ubuntu-vg-swap_1'
    
    
    
    
    
    
    =============================== StdErr Messages: ===============================
    
    
    cat: /tmp/BootInfo-R8I7k0ER/Tmp_Log: No such file or directory
      skip_dev_dir: Couldn't split up device name ubuntu-vg-root'
      Volume group name ubuntu-vg-root' has invalid characters
      Skipping volume group ubuntu-vg-root'
      skip_dev_dir: Couldn't split up device name ubuntu-vg-root'
      Volume group name ubuntu-vg-root' has invalid characters
      Skipping volume group ubuntu-vg-root'
      skip_dev_dir: Couldn't split up device name ubuntu-vg-root'
      Volume group name ubuntu-vg-root' has invalid characters
      Skipping volume group ubuntu-vg-root'
    hexdump: /dev/mapper/ubuntu-vg-root': No such file or directory
    hexdump: /dev/mapper/ubuntu-vg-root': No such file or directory
      skip_dev_dir: Couldn't split up device name ubuntu-vg-swap_1'
      Volume group name ubuntu-vg-swap_1' has invalid characters
      Skipping volume group ubuntu-vg-swap_1'
      skip_dev_dir: Couldn't split up device name ubuntu-vg-swap_1'
      Volume group name ubuntu-vg-swap_1' has invalid characters
      Skipping volume group ubuntu-vg-swap_1'
      skip_dev_dir: Couldn't split up device name ubuntu-vg-swap_1'
      Volume group name ubuntu-vg-swap_1' has invalid characters
      Skipping volume group ubuntu-vg-swap_1'
    hexdump: /dev/mapper/ubuntu-vg-swap_1': No such file or directory
    hexdump: /dev/mapper/ubuntu-vg-swap_1': No such file or directory
    Is it possible the problem is using LVM?

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

    Re: grub/os-prober can't find Windows 7 installation

    UEFI & BIOS are not compatible.
    You have to reboot to switch boot modes, so from grub menu booted in UEFI mode, you cannot another install in BIOS whether Windows or another Ubuntu.

    You can either convert Ubuntu to BIOS boot mode or reinstall Windows in UEFI boot mode.
    Boot-Repair can convert a UEFI install to BIOS if on gpt partitioned drive and you add a 1 or 2MB unformatted partition with the bios_grub flag, so grub can install in BIOS mode. Grub may default to installing to sda, but you want to be sure to select the Ubuntu drive and keep Windows BIOS boot loader on Windows drive.

    Was Windows originally sda? When directly booting it may be seen as first drive or sda, so it may not like being second drive. If it has issues you may need to change drive order on SATA ports so Windows is in first SATA port or SATA0.
    For more info on UEFI boot install & repair - Updated Oct 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.







  3. #3
    Join Date
    Nov 2011
    Beans
    2

    Re: grub/os-prober can't find Windows 7 installation

    Yes that was the problem. I was able to convert my MBR installation of Windows 7 to UEFI by following this:

    http://social.technet.microsoft.com/...n-to-uefi.aspx

    One problem to note for anyone else doing this: the bcdboot command in step #17 uses the /f UEFI option. My WIndows 7 version of bcdboot does not support that option.

    I happened to have a recovery USB stick handy from my Windows 8 laptop. I was able to boot from that just to perform step #17.
    Last edited by sgfallows; December 20th, 2015 at 09:31 PM.

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