Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a dual boot computer with Windows 7 and Ubuntu on it. Recently, i was working in Windows7 and my flash had crashed, the computer rebooted to

Error: Partition not found. Grub Rescue>

I had made a Ubuntu Live CD and attempted at fixing it with lilo, I managed to get Grub to work, but I wasn't able to boot up windows.

I went back into Live and did sudo apt-get install syslinux; sudo dd if=/usr/lib/syslinux/mbr.bin of=/dev/sda. I did the same again after rebooting into Windows7 had failed since it was complaining about not being able to load the kernel.

I had done it on sda2 and I reboot to see that it said the OS is missing. now, I did sudo fdisk -lu and I got the following:

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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 identifier: 0xe635605c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               0           0           0    6  FAT16
/dev/sda2   *        2048      206847      102400   de  Dell Utility
/dev/sda3          206848    20686847    10240000    7  HPFS/NTFS/exFAT
/dev/sda4        20686848   143566847    61440000    7  HPFS/NTFS/exFAT

I am sure sda1 was not like that...And I can't do cfdisk. It's giving me this error:

FATAL ERROR: Bad primary partition 1: Partition ends before sector 0


share|improve this question

Use gparted to fix your partition.
sudo apt-get install gparted && sudo gparted

Information about gparted usage you can find here.

share|improve this answer
+1 Good find. The specific area of the document to help the OP is "Task 7: Check & repair filesystem." – Aaron Sep 21 '12 at 14:02
  1. Fix Windows this way, until you get direct access to Windows.
  2. then use Boot-Repair to recover the GRUB menu
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.