The other day I was doing my backups and I was looking for more space to store my videos. So I formatted one of my harddrives (I have 4 not counting the external I was backing up to), but this harddrive turned out to be the wrong one. It had my Win7 installation and my MBR on it.
I figured, no big deal, I'll just use my super grub disk to boot properly, only it couldn't. For reasons unknown, even when I pointed it to the correct /boot partition, it couldn't boot. It also listed my raid 1 array partitions as "unknown".
Here's my setup:
SDA: 250 GB total - 250 GB in an NTFS partition with Win7 installed (this is the one I formatted)
SDB: 850 GB total - 4 GB Swap - 846 GB forms a raid array
SDC: 850 GB total - 4 GB /boot - 846 GB forms second part of raid array
SDD: 200 GB total - 200 GB NTFS partition with WinXP installed (this is the one I meant to format)
The Raid array is an LVM separated into a / and a /home. Neither are encrypted. I don't remember the exact distribution.
What can I do to recover my Ubuntu installation and restore GRUB to the MBR?
My /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/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
load_env
fi
set default="0"
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 ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod raid
insmod mdraid
insmod lvm
insmod ext2
set root='(main-root)'
search --no-floppy --fs-uuid --set 12dbe5ea-5a53-4928-bf91-23697c1bcba0
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
set locale_dir=($root)/grub/locale
set lang=en
insmod gettext
if [ ${recordfail} = 1 ]; then
set timeout=-1
else
set timeout=10
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
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.32-25-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux /vmlinuz-2.6.32-25-generic root=/dev/mapper/main-root ro quiet splash
initrd /initrd.img-2.6.32-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
echo 'Loading Linux 2.6.32-25-generic ...'
linux /vmlinuz-2.6.32-25-generic root=/dev/mapper/main-root ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.32-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-24-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux /vmlinuz-2.6.32-24-generic root=/dev/mapper/main-root ro quiet splash
initrd /initrd.img-2.6.32-24-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
echo 'Loading Linux 2.6.32-24-generic ...'
linux /vmlinuz-2.6.32-24-generic root=/dev/mapper/main-root ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.32-24-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-23-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux /vmlinuz-2.6.32-23-generic root=/dev/mapper/main-root ro quiet splash
initrd /initrd.img-2.6.32-23-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-23-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
echo 'Loading Linux 2.6.32-23-generic ...'
linux /vmlinuz-2.6.32-23-generic root=/dev/mapper/main-root ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.32-23-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-22-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux /vmlinuz-2.6.32-22-generic root=/dev/mapper/main-root ro quiet splash
initrd /initrd.img-2.6.32-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
echo 'Loading Linux 2.6.32-22-generic ...'
linux /vmlinuz-2.6.32-22-generic root=/dev/mapper/main-root ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.32-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.31-14-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux /vmlinuz-2.6.31-14-generic root=/dev/mapper/main-root ro quiet splash
initrd /initrd.img-2.6.31-14-generic
}
menuentry 'Ubuntu, with Linux 2.6.31-14-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
echo 'Loading Linux 2.6.31-14-generic ...'
linux /vmlinuz-2.6.31-14-generic root=/dev/mapper/main-root ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.31-14-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux16 /memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd3,1)'
search --no-floppy --fs-uuid --set f1284e5e-f162-4964-b904-f05f47f6325d
linux16 /memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows XP Ultimate (on /dev/sdb1)" {
insmod ntfs
set root='(hd1,1)'
search --no-floppy --fs-uuid --set 1a440692440670b5
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry "Windows 7 (loader) (on /dev/sdc1)" {
insmod ntfs
set root='(hd2,1)'
search --no-floppy --fs-uuid --set 5816f15316f1331c
chainloader +1
}
### END /etc/grub.d/30_os-prober ###
### 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 ###