Mudei partição e não deu bootar inicialização o Ubuntu. Veja aí o menu em Grub:
# menu.lst - See: grub(8), info grub, update-grub(8)
#            grub-install(8), grub-floppy(8),
#            grub-md5-crypt, /usr/share/doc/grub
#            and /usr/share/doc/grub-doc/.
## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default		0
## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout		10
## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu
# Pretty colours
#color cyan/blue white/blue
## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line)  and entries protected by the
# command 'lock'
# e.g. password topsecret
#      password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret
#
# examples
#
# title		Windows 95/98/NT/2000
# root		(hd0,0)
# makeactive
# chainloader	+1
#
# title		Linux
# root		(hd0,1)
# kernel	/vmlinuz root=/dev/hda2 ro
#
#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST
### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below
## DO NOT UNCOMMENT THEM, Just edit them to your needs
## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
##      kopt_2_6_8=root=/dev/hdc1 ro
##      kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=af4cb2c7-c3a8-461e-8cf5-03fa378a2246 ro
## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0
## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,2)
## should update-grub create alternative automagic boot options
## e.g. alternative=true
##      alternative=false
# alternative=true
## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
##      lockalternative=false
# lockalternative=false
## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash locale=pt_BR
## should update-grub lock old automagic boot options
## e.g. lockold=false
##      lockold=true
# lockold=false
## Xen hypervisor options to use with the default Xen boot option
# xenhopt=
## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0
## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
##      altoptions=(recovery) single
# altoptions=(recovery mode) single
## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
##      howmany=7
# howmany=all
## should update-grub create memtest86 boot option
## e.g. memtest86=true
##      memtest86=false
# memtest86=true
## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false
## ## End Default Options ##
title		Ubuntu, kernel 2.6.20-15-generic
root		(hd0,2)
kernel		/boot/vmlinuz-2.6.20-15-generic root=UUID=af4cb2c7-c3a8-461e-8cf5-03fa378a2246 ro quiet splash locale=pt_BR
initrd		/boot/initrd.img-2.6.20-15-generic
quiet
savedefault
title		Ubuntu, kernel 2.6.20-15-generic (recovery mode)
root		(hd0,2)
kernel		/boot/vmlinuz-2.6.20-15-generic root=UUID=af4cb2c7-c3a8-461e-8cf5-03fa378a2246 ro single
initrd		/boot/initrd.img-2.6.20-15-generic
title		Ubuntu, memtest86+
root		(hd0,2)
kernel		/boot/memtest86+.bin
quiet
### END DEBIAN AUTOMAGIC KERNELS LIST
# This is a divider, added to separate the menu items below from the Debian
# ones.
title		Other operating systems:
root
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title		Microsoft Windows XP Professional
root		(hd0,0)
savedefault
makeactive
chainloader	+1
E Fstab:
# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# /dev/sda3
UUID=af4cb2c7-c3a8-461e-8cf5-03fa378a2246 /               ext3    defaults,errors=remount-ro 0       1
# /dev/sda1
UUID=9880A82C80A812B4 /media/sda1     ntfs    defaults,nls=utf8,umask=007,gid=46 0       1
# /dev/sda5
UUID=ECDC008DDC0053EC /media/sda5     ntfs    defaults,nls=utf8,umask=007,gid=46 0       1
# /dev/sda6
UUID=390ec8a4-1998-445e-84c9-3e1668315649 none            swap    sw              0       0
/dev/hda        /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0
Fdisk:
root@ubuntu:~# fdisk -l /dev/sda
Disco /dev/sda: 160.0 GB, 160041885696 bytes
255 cabeças, 63 setores/trilha, 19457 cilindros
Unidades = cilindros de 16065 * 512 = 8225280 bytes
Dispositivo Boot Início Fim Blocos Id Sistema
/dev/sda1   *           1        5099    40957686    7  HPFS ou NTFS
/dev/sda2            5100       18380   106679632+   f  Win95 (LBA) Partição Extendida
/dev/sda3           18381       19457     8651002+  83  Linux
/dev/sda5            5100       18325   106237813+   7  HPFS ou NTFS
/dev/sda6           18326       18380      441756   82  Linux swap / Solaris
O que está errado?