[Bug 1744186] Re: No boot loader is installed in the MBR of /dev/sda. No known boot loader is installed in the MBR of /dev/sdb.

Phillip Susi psusi at ubuntu.com
Thu Apr 19 18:15:58 UTC 2018


Your disk is currently partitioned to boot in bios mode, but you booted
the installer in EFI mode. A warning message prompted you that this
could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or partition the disk using GPT and set up an EFI system
partition to install in EFI mode. This will be done for you if you
choose the "use entire disk" guided install option.

** Changed in: grub-installer (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1744186

Title:
  No boot loader is installed in the MBR of /dev/sda.   No known boot
  loader is installed in the MBR of /dev/sdb.

Status in grub-installer package in Ubuntu:
  Invalid

Bug description:
   Boot Info Script 8f991e4 + Boot-Repair extra info      [Boot-Info
  25oct2017]

  
  ============================= Boot Info Summary: ===============================

   => No boot loader is installed in the MBR of /dev/sda.
   => No known boot loader 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:       ext4
      Boot sector type:  -
      Boot sector info: 
      Operating System:  Ubuntu 16.04.1 LTS
      Boot files:        /boot/grub/grub.cfg /etc/fstab

  sda3:
  __________________________________________________________________________

      File system:       swap
      Boot sector type:  -
      Boot sector info: 

  sda4:
  __________________________________________________________________________

      File system:       ext4
      Boot sector type:  -
      Boot sector info: 
      Operating System:  
      Boot files:        

  sda5:
  __________________________________________________________________________

      File system:       
      Boot sector type:  -
      Boot sector info: 
      Mounting failed:   mount: unknown filesystem type ''

  sdb1:
  __________________________________________________________________________

      File system:       iso9660
      Boot sector type:  Unknown
      Boot sector info: 
      Mounting failed:   mount: unknown filesystem type ''
  mount: /dev/sdb1 is already mounted or /mnt/BootInfo/sdb1 busy

  sdb2:
  __________________________________________________________________________

      File system:       vfat
      Boot sector type:  FAT16
      Boot sector info:  According to the info in the boot sector, sdb2 starts 
                         at sector 0. But according to the info from fdisk, 
                         sdb2 starts at sector 2927216. According to the info 
                         in the boot sector, sdb2 has 0 sectors.
      Mounting failed:   mount: unknown filesystem type ''
  mount: /dev/sdb1 is already mounted or /mnt/BootInfo/sdb1 busy
  mount: /dev/sdb2 is already mounted or /mnt/BootInfo/sdb2 busy

  ============================ Drive/Partition Info:
  =============================

  Drive: sda _____________________________________________________________________
  Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disklabel type: gpt

  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  Attrs   Start Sector    End Sector  # of Sectors System
  /dev/sda1                 2,048     1,050,623     1,048,576 Swap partition (Linux)
  /dev/sda2           586,338,304 1,172,674,241   586,335,938 Data partition (Linux)
  /dev/sda3         1,172,674,560 1,193,758,719    21,084,160 Swap partition (Linux)
  /dev/sda4         1,193,758,720 1,953,523,711   759,764,992 Data partition (Linux)
  /dev/sda5             1,050,624   586,338,303   585,287,680 Data partition (Linux)

  Attributes: R=Required, N=No Block IO, B=Legacy BIOS Bootable, +=More
  bits set

  Drive: sdb _____________________________________________________________________
  Disk /dev/sdb: 14.3 GiB, 15376000000 bytes, 30031250 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos

  Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

  /dev/sdb1    *              0     2,955,679     2,955,680   0 Empty
  /dev/sdb2           2,927,216     2,931,951         4,736  ef EFI (FAT-12/16/32)

  /dev/sdb1 overlaps with /dev/sdb2

  GUID Partition Table detected, but does not seem to be used.

  Partition  Attrs   Start Sector    End Sector  # of Sectors System
  /dev/sdb1   +  R              0     2,955,623     2,955,624 Data partition (Windows/Linux)
  /dev/sdb2   +  R      2,927,216     2,931,951         4,736 Data partition (Windows/Linux)

  Attributes: R=Required, N=No Block IO, B=Legacy BIOS Bootable, +=More
  bits set

  "blkid" output:
  ________________________________________________________________

  Device           UUID                                   TYPE
  LABEL

  /dev/loop0                                              squashfs   
  /dev/sda1        670A-A720                              vfat       
  /dev/sda2        b4981b52-3fbc-4e00-969a-6f920798b9b9   ext4       
  /dev/sda3        35eebfb6-f417-490f-9300-107f924dd000   swap       
  /dev/sda4        a2c0c858-bfce-4c3c-a764-56b99ed8e41b   ext4       
  /dev/sda5                                                          
  /dev/sdb1        2016-07-19-21-27-51-00                 iso9660    Ubuntu 16.04.1 LTS amd64
  /dev/sdb2        0F7B-9366                              vfat       

  ========================= "ls -l /dev/disk/by-id" output:
  ======================

  total 0
  lrwxrwxrwx 1 root root  9 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV -> ../../sda
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV-part1 -> ../../sda1
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV-part2 -> ../../sda2
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV-part3 -> ../../sda3
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV-part4 -> ../../sda4
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 ata-HGST_HTS541010A9E680_JD1008CC1JL2ZV-part5 -> ../../sda5
  lrwxrwxrwx 1 root root  9 Jan 19 07:02 ata-hp_DVDRW_GUB0N_M7HEB523052 -> ../../sr0
  lrwxrwxrwx 1 root root  9 Jan 19 07:19 usb-SanDisk_Ultra_4C530001050426117281-0:0 -> ../../sdb
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 usb-SanDisk_Ultra_4C530001050426117281-0:0-part1 -> ../../sdb1
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 usb-SanDisk_Ultra_4C530001050426117281-0:0-part2 -> ../../sdb2
  lrwxrwxrwx 1 root root  9 Jan 19 07:19 wwn-0x5000cca792d5a15f -> ../../sda
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 wwn-0x5000cca792d5a15f-part1 -> ../../sda1
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 wwn-0x5000cca792d5a15f-part2 -> ../../sda2
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 wwn-0x5000cca792d5a15f-part3 -> ../../sda3
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 wwn-0x5000cca792d5a15f-part4 -> ../../sda4
  lrwxrwxrwx 1 root root 10 Jan 19 07:19 wwn-0x5000cca792d5a15f-part5 -> ../../sda5
  lrwxrwxrwx 1 root root  9 Jan 19 07:02 wwn-0x5001480000000000 -> ../../sr0

  ================================ Mount points:
  =================================

  Device           Mount_Point              Type       Options

  /dev/loop0       /rofs                    squashfs   (ro,noatime)
  /dev/sda2        /target                  ext4       (rw,relatime,errors=remount-ro,data=ordered)
  /dev/sdb         /cdrom                   iso9660    (ro,noatime)
  /dev/sdb         /target/cdrom            iso9660    (ro,noatime)

  
  =========================== sda2/boot/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$feature_default_font_path = xy ] ; then
     font=unicode
  else
  insmod part_gpt
  insmod ext2
  set root='hd0,gpt2'
  if [ x$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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  else
    search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  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_IN
    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-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  	recordfail
  	load_video
  	gfxmode $linux_gfx_mode
  	insmod gzio
  	if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  	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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  	else
  	  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  	fi
  	linux	/boot/vmlinuz-4.4.0-109-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro  quiet splash $vt_handoff
  	initrd	/boot/initrd.img-4.4.0-109-generic
  }
  submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  	menuentry 'Ubuntu, with Linux 4.4.0-109-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-109-generic-advanced-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		gfxmode $linux_gfx_mode
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-109-generic ...'
  		linux	/boot/vmlinuz-4.4.0-109-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro  quiet splash $vt_handoff
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-109-generic
  	}
  	menuentry 'Ubuntu, with Linux 4.4.0-109-generic (upstart)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-109-generic-init-upstart-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		gfxmode $linux_gfx_mode
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-109-generic ...'
  		linux	/boot/vmlinuz-4.4.0-109-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro  quiet splash $vt_handoff init=/sbin/upstart
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-109-generic
  	}
  	menuentry 'Ubuntu, with Linux 4.4.0-109-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-109-generic-recovery-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-109-generic ...'
  		linux	/boot/vmlinuz-4.4.0-109-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro recovery nomodeset 
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-109-generic
  	}
  	menuentry 'Ubuntu, with Linux 4.4.0-31-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-31-generic-advanced-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		gfxmode $linux_gfx_mode
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-31-generic ...'
  		linux	/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro  quiet splash $vt_handoff
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-31-generic
  	}
  	menuentry 'Ubuntu, with Linux 4.4.0-31-generic (upstart)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-31-generic-init-upstart-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		gfxmode $linux_gfx_mode
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-31-generic ...'
  		linux	/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro  quiet splash $vt_handoff init=/sbin/upstart
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-31-generic
  	}
  	menuentry 'Ubuntu, with Linux 4.4.0-31-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-31-generic-recovery-b4981b52-3fbc-4e00-969a-6f920798b9b9' {
  		recordfail
  		load_video
  		insmod gzio
  		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  		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  b4981b52-3fbc-4e00-969a-6f920798b9b9
  		else
  		  search --no-floppy --fs-uuid --set=root b4981b52-3fbc-4e00-969a-6f920798b9b9
  		fi
  		echo	'Loading Linux 4.4.0-31-generic ...'
  		linux	/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 ro recovery nomodeset 
  		echo	'Loading initial ramdisk ...'
  		initrd	/boot/initrd.img-4.4.0-31-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 ###
  menuentry 'System setup' $menuentry_id_option 'uefi-firmware' {
  	fwsetup
  }
  ### 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/etc/fstab:
  ================================

  --------------------------------------------------------------------------------
  # /etc/fstab: static file system information.
  #
  # Use 'blkid' to print the universally unique identifier for a
  # device; this may be used with UUID= as a more robust way to name devices
  # that works even if disks are added and removed. See fstab(5).
  #
  # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  # / was on /dev/sda2 during installation
  UUID=b4981b52-3fbc-4e00-969a-6f920798b9b9 /               ext4    errors=remount-ro 0       1
  # swap was on /dev/sda3 during installation
  UUID=35eebfb6-f417-490f-9300-107f924dd000 none            swap    sw              0       0
  --------------------------------------------------------------------------------

  =================== sda2: Location of files loaded by Grub:
  ====================

             GiB - GB             File
  Fragment(s)

   359.871337891 = 386.408906752  boot/grub/grub.cfg                             1
   360.364009857 = 386.937909248  boot/vmlinuz-4.4.0-109-generic                 1
   360.496849060 = 387.080544256  boot/vmlinuz-4.4.0-109-generic.efi.signed      1
   280.793670654 = 301.499908096  boot/vmlinuz-4.4.0-31-generic                  1
   355.727153778 = 381.959122944  boot/vmlinuz-4.4.0-31-generic.efi.signed       1
   280.793670654 = 301.499908096  vmlinuz                                        1
   360.591690063 = 387.182379008  boot/initrd.img-4.4.0-109-generic              2
   360.634761810 = 387.228626944  boot/initrd.img-4.4.0-31-generic               2
   360.634761810 = 387.228626944  initrd.img                                     2
   360.634761810 = 387.228626944  initrd.img.old                                 2

  ======================== Unknown MBRs/Boot Sectors/etc:
  ========================

  Unknown MBR on /dev/sdb

  00000000  45 52 08 00 00 00 90 90  00 00 00 00 00 00 00 00  |ER..............|
  00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000020  33 ed fa 8e d5 bc 00 7c  fb fc 66 31 db 66 31 c9  |3......|..f1.f1.|
  00000030  66 53 66 51 06 57 8e dd  8e c5 52 be 00 7c bf 00  |fSfQ.W....R..|..|
  00000040  06 b9 00 01 f3 a5 ea 4b  06 00 00 52 b4 41 bb aa  |.......K...R.A..|
  00000050  55 31 c9 30 f6 f9 cd 13  72 16 81 fb 55 aa 75 10  |U1.0....r...U.u.|
  00000060  83 e1 01 74 0b 66 c7 06  f1 06 b4 42 eb 15 eb 00  |...t.f.....B....|
  00000070  5a 51 b4 08 cd 13 83 e1  3f 5b 51 0f b6 c6 40 50  |ZQ......?[Q... at P|
  00000080  f7 e1 53 52 50 bb 00 7c  b9 04 00 66 a1 b0 07 e8  |..SRP..|...f....|
  00000090  44 00 0f 82 80 00 66 40  80 c7 02 e2 f2 66 81 3e  |D.....f at .....f.>|
  000000a0  40 7c fb c0 78 70 75 09  fa bc ec 7b ea 44 7c 00  |@|..xpu....{.D|.|
  000000b0  00 e8 83 00 69 73 6f 6c  69 6e 75 78 2e 62 69 6e  |....isolinux.bin|
  000000c0  20 6d 69 73 73 69 6e 67  20 6f 72 20 63 6f 72 72  | missing or corr|
  000000d0  75 70 74 2e 0d 0a 66 60  66 31 d2 66 03 06 f8 7b  |upt...f`f1.f...{|
  000000e0  66 13 16 fc 7b 66 52 66  50 06 53 6a 01 6a 10 89  |f...{fRfP.Sj.j..|
  000000f0  e6 66 f7 36 e8 7b c0 e4  06 88 e1 88 c5 92 f6 36  |.f.6.{.........6|
  00000100  ee 7b 88 c6 08 e1 41 b8  01 02 8a 16 f2 7b cd 13  |.{....A......{..|
  00000110  8d 64 10 66 61 c3 e8 1e  00 4f 70 65 72 61 74 69  |.d.fa....Operati|
  00000120  6e 67 20 73 79 73 74 65  6d 20 6c 6f 61 64 20 65  |ng system load e|
  00000130  72 72 6f 72 2e 0d 0a 5e  ac b4 0e 8a 3e 62 04 b3  |rror...^....>b..|
  00000140  07 cd 10 3c 0a 75 f1 cd  18 f4 eb fd 00 00 00 00  |...<.u..........|
  00000150  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000160  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000190  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  000001b0  fc 85 2c 00 00 00 00 00  e7 63 a8 40 00 00 80 00  |..,......c. at ....|
  000001c0  01 00 00 5a e0 f6 00 00  00 00 a0 19 2d 00 00 fe  |...Z........-...|
  000001d0  ff ff ef fe ff ff 70 aa  2c 00 80 12 00 00 00 00  |......p.,.......|
  000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
  00000200

  
  /dev/sdb1: unknown GPT attributes
  1000000000000001

  /dev/sdb2: unknown GPT attributes
  1000000000000001
  Unknown BootLoader on sdb1

  00000000  45 52 08 00 00 00 90 90  00 00 00 00 00 00 00 00  |ER..............|
  00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000020  33 ed fa 8e d5 bc 00 7c  fb fc 66 31 db 66 31 c9  |3......|..f1.f1.|
  00000030  66 53 66 51 06 57 8e dd  8e c5 52 be 00 7c bf 00  |fSfQ.W....R..|..|
  00000040  06 b9 00 01 f3 a5 ea 4b  06 00 00 52 b4 41 bb aa  |.......K...R.A..|
  00000050  55 31 c9 30 f6 f9 cd 13  72 16 81 fb 55 aa 75 10  |U1.0....r...U.u.|
  00000060  83 e1 01 74 0b 66 c7 06  f1 06 b4 42 eb 15 eb 00  |...t.f.....B....|
  00000070  5a 51 b4 08 cd 13 83 e1  3f 5b 51 0f b6 c6 40 50  |ZQ......?[Q... at P|
  00000080  f7 e1 53 52 50 bb 00 7c  b9 04 00 66 a1 b0 07 e8  |..SRP..|...f....|
  00000090  44 00 0f 82 80 00 66 40  80 c7 02 e2 f2 66 81 3e  |D.....f at .....f.>|
  000000a0  40 7c fb c0 78 70 75 09  fa bc ec 7b ea 44 7c 00  |@|..xpu....{.D|.|
  000000b0  00 e8 83 00 69 73 6f 6c  69 6e 75 78 2e 62 69 6e  |....isolinux.bin|
  000000c0  20 6d 69 73 73 69 6e 67  20 6f 72 20 63 6f 72 72  | missing or corr|
  000000d0  75 70 74 2e 0d 0a 66 60  66 31 d2 66 03 06 f8 7b  |upt...f`f1.f...{|
  000000e0  66 13 16 fc 7b 66 52 66  50 06 53 6a 01 6a 10 89  |f...{fRfP.Sj.j..|
  000000f0  e6 66 f7 36 e8 7b c0 e4  06 88 e1 88 c5 92 f6 36  |.f.6.{.........6|
  00000100  ee 7b 88 c6 08 e1 41 b8  01 02 8a 16 f2 7b cd 13  |.{....A......{..|
  00000110  8d 64 10 66 61 c3 e8 1e  00 4f 70 65 72 61 74 69  |.d.fa....Operati|
  00000120  6e 67 20 73 79 73 74 65  6d 20 6c 6f 61 64 20 65  |ng system load e|
  00000130  72 72 6f 72 2e 0d 0a 5e  ac b4 0e 8a 3e 62 04 b3  |rror...^....>b..|
  00000140  07 cd 10 3c 0a 75 f1 cd  18 f4 eb fd 00 00 00 00  |...<.u..........|
  00000150  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  *
  000001b0  fc 85 2c 00 00 00 00 00  e7 63 a8 40 00 00 80 00  |..,......c. at ....|
  000001c0  01 00 00 5a e0 f6 00 00  00 00 a0 19 2d 00 00 fe  |...Z........-...|
  000001d0  ff ff ef fe ff ff 70 aa  2c 00 80 12 00 00 00 00  |......p.,.......|
  000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
  00000200

  
  =============================== StdErr Messages: ===============================

  File descriptor 9 (/proc/19978/mounts) leaked on lvs invocation. Parent PID 29875: bash
  File descriptor 63 (pipe:[272066]) leaked on lvs invocation. Parent PID 29875: bash

  ADDITIONAL INFORMATION :
  =================== log of boot-info 20180119_0719 ===================
  boot-info version : 4ppa65
  boot-sav version : 4ppa65
  boot-sav-extra version : 4ppa65
  glade2script version : 3.2.3~ppa4
  grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
  Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.
  boot-info is executed in live-session (Ubuntu 16.04.1 LTS, xenial, Ubuntu, x86_64)
  CPU op-mode(s):        32-bit, 64-bit
  BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
  ls: cannot access '/home/usr/.config': No such file or directory
  mount: /dev/sda5 is write-protected, mounting read-only
  NTFS signature is missing.
  Failed to mount '/dev/sda5': Invalid argument
  The device '/dev/sda5' doesn't seem to have a valid NTFS.
  Maybe the wrong device is used? Or the whole disk instead of a
  partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
  mount /dev/sda5 : Error code 12
  mount -r /dev/sda5 /mnt/boot-sav/sda5
  NTFS signature is missing.
  Failed to mount '/dev/sda5': Invalid argument
  The device '/dev/sda5' doesn't seem to have a valid NTFS.
  Maybe the wrong device is used? Or the whole disk instead of a
  partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
  mount -r /dev/sda5 : Error code 12

  =================== os-prober:

  
  =================== blkid:
  /dev/sda2: UUID="b4981b52-3fbc-4e00-969a-6f920798b9b9" TYPE="ext4" PARTUUID="dc8d0db6-f0d7-4ed1-ad81-119978f3a5ef"
  /dev/sda3: UUID="35eebfb6-f417-490f-9300-107f924dd000" TYPE="swap" PARTUUID="a56707d0-dc20-4e17-9773-dab783ab3312"
  /dev/sdb2: SEC_TYPE="msdos" UUID="0F7B-9366" TYPE="vfat" PARTUUID="40a863e7-02"
  /dev/sda4: UUID="a2c0c858-bfce-4c3c-a764-56b99ed8e41b" TYPE="ext4" PARTUUID="8826355a-6cb6-4551-950c-3766ad9cbf21"
  /dev/sda1: UUID="670A-A720" TYPE="vfat" PARTUUID="74781ae8-ea63-4469-8cef-d7aa5b727408"
  /dev/loop0: TYPE="squashfs"
  /dev/sdb1: UUID="2016-07-19-21-27-51-00" LABEL="Ubuntu 16.04.1 LTS amd64" TYPE="iso9660" PTUUID="40a863e7" PTTYPE="dos" PARTUUID="40a863e7-01"
  /dev/sda5: PARTUUID="3d400e81-6036-4b11-9729-a87332aee865"

  mount: /dev/sda5 is write-protected, mounting read-only
  NTFS signature is missing.
  Failed to mount '/dev/sda5': Invalid argument
  The device '/dev/sda5' doesn't seem to have a valid NTFS.
  Maybe the wrong device is used? Or the whole disk instead of a
  partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
  mount /dev/sda5 : Error code 12
  mount -r /dev/sda5 /mnt/boot-sav/sda5
  NTFS signature is missing.
  Failed to mount '/dev/sda5': Invalid argument
  The device '/dev/sda5' doesn't seem to have a valid NTFS.
  Maybe the wrong device is used? Or the whole disk instead of a
  partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
  mount -r /dev/sda5 : Error code 12
  Linux not detected by os-prober on sda2. Please report this message to boot.repair at gmail.com

  =================== /target/etc/grub.d/ :
  drwxr-xr-x  2 root root    4096 Jan 19 07:12 grub.d
  total 80
  -rwxr-xr-x 1 root root  9791 Jun 17  2016 00_header
  -rwxr-xr-x 1 root root  6258 Mar 15  2016 05_debian_theme
  -rwxr-xr-x 1 root root 12512 Dec 13 04:18 10_linux
  -rwxr-xr-x 1 root root 11082 Jun 17  2016 20_linux_xen
  -rwxr-xr-x 1 root root  1992 Jan 28  2016 20_memtest86+
  -rwxr-xr-x 1 root root 11692 Jun 17  2016 30_os-prober
  -rwxr-xr-x 1 root root  1418 Jun 17  2016 30_uefi-firmware
  -rwxr-xr-x 1 root root   214 Jun 17  2016 40_custom
  -rwxr-xr-x 1 root root   216 Jun 17  2016 41_custom
  -rw-r--r-- 1 root root   483 Jun 17  2016 README


  
  =================== /target/etc/default/grub :

  # If you change this file, run 'update-grub' afterwards to update
  # /boot/grub/grub.cfg.
  # For full documentation of the options in this file, see:
  #   info -f grub -n 'Simple configuration'

  GRUB_DEFAULT=0
  GRUB_HIDDEN_TIMEOUT=0
  GRUB_HIDDEN_TIMEOUT_QUIET=true
  GRUB_TIMEOUT=10
  GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  GRUB_CMDLINE_LINUX=""

  # Uncomment to enable BadRAM filtering, modify to suit your needs
  # This works with Linux (no patch required) and with any kernel that obtains
  # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
  #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

  # Uncomment to disable graphical terminal (grub-pc only)
  #GRUB_TERMINAL=console

  # The resolution used on graphical terminal
  # note that you can use only modes which your graphic card supports via VBE
  # you can see them in real GRUB with the command `vbeinfo'
  #GRUB_GFXMODE=640x480

  # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
  #GRUB_DISABLE_LINUX_UUID=true

  # Uncomment to disable generation of recovery mode menu entries
  #GRUB_DISABLE_RECOVERY="true"

  # Uncomment to get a beep at grub start
  #GRUB_INIT_TUNE="480 440 1"


  
  =================== efibootmgr -v
  BootCurrent: 0002
  Timeout: 0 seconds
  BootOrder: 2001,2002,2004
  Boot0000* Notebook Hard Drive - HGST HTS541010A9E680	BBS(HD,Notebook Hard Drive - HGST HTS541010A9E680,0x500)................-.}.......}.A.}...................................4........A.........................
  Boot0001* USB Hard Drive - SanDisk	BBS(7,USB Hard Drive - SanDisk,0x500)..................................................................I;........A.....................
  Boot0002* USB Hard Drive (UEFI) - SanDisk	PciRoot(0x0)/Pci(0x14,0x0)/USB(11,0)/HD(1,MBR,0x4294967271,0x2caa70,0x1280)RC
  Boot2001* EFI USB Device	RC
  Boot2002* EFI DVD/CDROM	RC

  =================== UEFI/Legacy mode:
  BIOS is EFI-compatible, and is setup in EFI-mode for this live-session.
  SecureBoot disabled. (maybe sec-boot, Please report this message to boot.repair at gmail.com)

  
  =================== PARTITIONS & DISKS:
  sda2	: sda,	not-sepboot,	no-grubenv	grub2,	signed grub-efi ,	update-grub,	64,	with-boot,	is-os,	not--efi--part,	fstab-without-boot,	fstab-without-efi,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot,	apt-get,	grub-install,	with--usr,	fstab-without-usr,	not-sep-usr,	standard,	farbios,	notbiosboot, /target.
  sda4	: sda,	maybesepboot,	no-grubenv	nogrub,	no-docgrub,	no-update-grub,	32,	no-boot,	no-os,	not--efi--part,	part-has-no-fstab,	part-has-no-fstab,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot,	nopakmgr,	nogrubinstall,	no---usr,	part-has-no-fstab,	not-sep-usr,	standard,	farbios,	notbiosboot, /mnt/boot-sav/sda4.
  sda1	: sda,	not-sepboot,	no-grubenv	nogrub,	no-docgrub,	no-update-grub,	32,	no-boot,	no-os,	not--efi--part,	part-has-no-fstab,	part-has-no-fstab,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot,	nopakmgr,	nogrubinstall,	no---usr,	part-has-no-fstab,	not-sep-usr,	standard,	not-far,	notbiosboot, /mnt/boot-sav/sda1.
  sda5	: sda,	maybesepboot,	no-grubenv	nogrub,	no-docgrub,	no-update-grub,	32,	no-boot,	no-os,	not--efi--part,	part-has-no-fstab,	part-has-no-fstab,	no-nt,	no-winload,	no-recov-nor-hid,	no-bmgr,	notwinboot,	nopakmgr,	nogrubinstall,	no---usr,	part-has-no-fstab,	not-sep-usr,	standard,	farbios,	notbiosboot, /mnt/boot-sav/sda5.

  sda     : GPT,  no-BIOS_boot,   has-no-EFIpart,         not-usb,
  not-mmc, has-os,        2048 sectors * 512 bytes

  
  =================== parted -lm:

  BYT;
  /dev/sda:1000GB:scsi:512:4096:gpt:ATA HGST HTS541010A9:;
  1:1049kB:538MB:537MB:fat32::;
  5:538MB:300GB:300GB:::;
  2:300GB:600GB:300GB:ext4::;
  3:600GB:611GB:10.8GB:linux-swap(v1)::;
  4:611GB:1000GB:389GB:ext4::;

  BYT;
  /dev/sdb:15.4GB:scsi:512:512:unknown:SanDisk Ultra:;

  =================== lsblk:
  KNAME TYPE FSTYPE     SIZE LABEL
  sda   disk          931.5G
  sda1  part vfat       512M
  sda2  part ext4     279.6G
  sda3  part swap      10.1G
  sda4  part ext4     362.3G
  sda5  part          279.1G
  sdb   disk iso9660   14.3G Ubuntu 16.04.1 LTS amd64
  sdb1  part iso9660    1.4G Ubuntu 16.04.1 LTS amd64
  sdb2  part vfat       2.3M Ubuntu 16.04.1 LTS amd64
  sr0   rom            1024M
  loop0 loop squashfs   1.4G

  KNAME ROTA RO RM STATE   MOUNTPOINT
  sda      1  0  0 running
  sda1     1  0  0         /mnt/boot-sav/sda1
  sda2     1  0  0         /target
  sda3     1  0  0         [SWAP]
  sda4     1  0  0         /mnt/boot-sav/sda4
  sda5     1  0  0
  sdb      1  0  1 running /target/cdrom
  sdb1     1  0  1
  sdb2     1  0  1
  sr0      1  0  1 running
  loop0    1  1  0         /rofs

  
  =================== mount:
  sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
  proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
  udev on /dev type devtmpfs (rw,nosuid,relatime,size=4033128k,nr_inodes=1008282,mode=755)
  devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
  tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=809552k,mode=755)
  /dev/sdb on /cdrom type iso9660 (ro,noatime)
  /dev/loop0 on /rofs type squashfs (ro,noatime)
  /cow on / type overlay (rw,relatime,lowerdir=//filesystem.squashfs,upperdir=/cow/upper,workdir=/cow/work)
  securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
  tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
  tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
  tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
  cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
  pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
  efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
  cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
  cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
  cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
  cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
  cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
  cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
  cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
  cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
  cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
  cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
  systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=24,pgrp=1,timeout=0,minproto=5,maxproto=5,direct)
  mqueue on /dev/mqueue type mqueue (rw,relatime)
  hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
  debugfs on /sys/kernel/debug type debugfs (rw,relatime)
  tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)
  fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
  tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
  tmpfs on /run/user/999 type tmpfs (rw,nosuid,nodev,relatime,size=809552k,mode=700,uid=999,gid=999)
  gvfsd-fuse on /run/user/999/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=999,group_id=999)
  /dev/sda2 on /target type ext4 (rw,relatime,errors=remount-ro,data=ordered)
  /dev/sdb on /target/cdrom type iso9660 (ro,noatime)
  proc on /target/proc type proc (rw,nosuid,nodev,noexec,relatime)
  sysfs on /target/sys type sysfs (rw,nosuid,nodev,noexec,relatime)
  udev on /target/dev type devtmpfs (rw,nosuid,relatime,size=4033128k,nr_inodes=1008282,mode=755)
  tmpfs on /target/run type tmpfs (rw,nosuid,noexec,relatime,size=809552k,mode=755)
  /dev/sda4 on /mnt/boot-sav/sda4 type ext4 (rw,relatime,data=ordered)
  /dev/sda1 on /mnt/boot-sav/sda1 type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

  
  =================== ls:
  /sys/block/sda (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight integrity power queue range removable ro sda1 sda2 sda3 sda4 sda5 size slaves stat subsystem trace uevent
  /sys/block/sdb (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight integrity power queue range removable ro sdb1 sdb2 size slaves stat subsystem trace uevent
  /sys/block/sr0 (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight integrity power queue range removable ro size slaves stat subsystem trace uevent
  /dev (filtered):  autofs block bsg btrfs-control bus cdrom cdrw char console core cpu cpu_dma_latency cuse disk dri dvd dvdrw ecryptfs fb0 fd freefall full fuse hpet hugepages hwrng i2c-0 i2c-1 i2c-2 i2c-3 i2c-4 initctl input kmsg lightnvm log mapper mcelog media0 mei0 mem memory_bandwidth mqueue net network_latency network_throughput null port ppp psaux ptmx pts random rfkill rtc rtc0 sda sda1 sda2 sda3 sda4 sda5 sdb sdb1 sdb2 sg0 sg1 sg2 shm snapshot snd sr0 stderr stdin stdout uhid uinput urandom userio v4l vfio vga_arbiter vhci vhost-net video0 zero
  ls /dev/mapper:  control

  =================== hexdump -n512 -C /dev/sda1
  00000000  eb 58 90 6d 6b 66 73 2e  66 61 74 00 02 08 20 00  |.X.mkfs.fat... .|
  00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 08 00 00  |........?.......|
  00000020  00 00 10 00 fe 03 00 00  00 00 00 00 02 00 00 00  |................|
  00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000040  80 01 29 20 a7 0a 67 4e  4f 20 4e 41 4d 45 20 20  |..) ..gNO NAME  |
  00000050  20 20 46 41 54 33 32 20  20 20 0e 1f be 77 7c ac  |  FAT32   ...w|.|
  00000060  22 c0 74 0b 56 b4 0e bb  07 00 cd 10 5e eb f0 32  |".t.V.......^..2|
  00000070  e4 cd 16 cd 19 eb fe 54  68 69 73 20 69 73 20 6e  |.......This is n|
  00000080  6f 74 20 61 20 62 6f 6f  74 61 62 6c 65 20 64 69  |ot a bootable di|
  00000090  73 6b 2e 20 20 50 6c 65  61 73 65 20 69 6e 73 65  |sk.  Please inse|
  000000a0  72 74 20 61 20 62 6f 6f  74 61 62 6c 65 20 66 6c  |rt a bootable fl|
  000000b0  6f 70 70 79 20 61 6e 64  0d 0a 70 72 65 73 73 20  |oppy and..press |
  000000c0  61 6e 79 20 6b 65 79 20  74 6f 20 74 72 79 20 61  |any key to try a|
  000000d0  67 61 69 6e 20 2e 2e 2e  20 0d 0a 00 00 00 00 00  |gain ... .......|
  000000e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  *
  000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
  00000200

  =================== df -Th:

  Filesystem     Type      Size  Used Avail Use% Mounted on
  udev           devtmpfs  3.9G     0  3.9G   0% /dev
  tmpfs          tmpfs     791M  9.5M  782M   2% /run
  /dev/sdb       iso9660   1.5G  1.5G     0 100% /cdrom
  /dev/loop0     squashfs  1.4G  1.4G     0 100% /rofs
  /cow           overlay   3.9G  177M  3.7G   5% /
  tmpfs          tmpfs     3.9G  576K  3.9G   1% /dev/shm
  tmpfs          tmpfs     5.0M  8.0K  5.0M   1% /run/lock
  tmpfs          tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
  tmpfs          tmpfs     3.9G  368K  3.9G   1% /tmp
  tmpfs          tmpfs     791M   88K  791M   1% /run/user/999
  /dev/sda2      ext4      276G  4.4G  257G   2% /target
  /dev/sda4      ext4      357G   67M  339G   1% /mnt/boot-sav/sda4
  /dev/sda1      vfat      511M  4.0K  511M   1% /mnt/boot-sav/sda1

  =================== fdisk -l:
  Disk /dev/ram0: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram1: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram2: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram3: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram4: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram5: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram6: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram7: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram8: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram9: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram10: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram11: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram12: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram13: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram14: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/ram15: 64 MiB, 67108864 bytes, 131072 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes

  
  Disk /dev/loop0: 1.4 GiB, 1459982336 bytes, 2851528 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes

  
  Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disklabel type: gpt
  Disk identifier: AE5ED132-6658-4757-AF46-1364875E9C73

  Device          Start        End   Sectors   Size Type
  /dev/sda1        2048    1050623   1048576   512M Linux swap
  /dev/sda2   586338304 1172674241 586335938 279.6G Linux filesystem
  /dev/sda3  1172674560 1193758719  21084160  10.1G Linux swap
  /dev/sda4  1193758720 1953523711 759764992 362.3G Linux filesystem
  /dev/sda5     1050624  586338303 585287680 279.1G Linux filesystem

  Partition table entries are not in disk order.


  
  Disk /dev/sdb: 14.3 GiB, 15376000000 bytes, 30031250 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0x40a863e7

  Device     Boot   Start     End Sectors  Size Id Type
  /dev/sdb1  *          0 2955679 2955680  1.4G  0 Empty
  /dev/sdb2       2927216 2931951    4736  2.3M ef EFI (FAT-12/16/32)

  
  ping: unknown host google.com
  (debug) reinstall grub2 place-in-MBR no-BIOS_boot (sda2)

  
  =================== Suggested repair
  The default repair of the Boot-Repair utility would purge (in order to fix packages) and reinstall the grub2 of sda2 into the MBR of sda.
  Additional repair would be performed: unhide-bootmenu-10s

  
  =================== Blockers in case of suggested repair
  GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again.

  
  =================== Advice in case of suggested repair
  Warning: continuing without internet would leave your system unbootable. Please connect internet.
  The boot of your PC is in EFI mode, but no EFI partition was detected. You may want to retry after creating a EFI partition (FAT32, 100MB~250MB, start of the disk, boot flag).
  Do you want to continue?

  
  =================== User settings
  The settings chosen by the user will not act on the boot.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.2
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CasperVersion: 1.376
  Date: Fri Jan 19 07:27:12 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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