I had a dualboot laptop with windows XP and Ubuntu 11.10. I had the following partitions for Ubuntu:
- partition for “/boot”. This was the boot partition
- root partition “/”
- swap partition
and an ntfs partition for windows and another one for the data.
After installing XP I have lost the partitions table and the windows boots up every time.
If I start an Ubuntu 11.10 I can see the followings:
1. fdisk sees all partitions:
| $ sudo fdisk -l omitting empty partition (5)Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 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: 0x516d077aDevice Boot Start End Blocks Id System /dev/sda1 * 63 81915434 40957686 7 HPFS/NTFS/exFAT /dev/sda2 81915904 82403327 243712 83 Linux /dev/sda3 82405374 144695295 31144961 5 Extended /dev/sda4 86310912 144695295 29192192 83 Linux /dev/sda5 82405376 86308863 1951744 82 Linux swap / Solaris |
2. gparted sees nothing:
and this:
Tested guides:
https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows
https://help.ubuntu.com/community/Boot-Repair
I inserted an ubuntu 11.10 cd and used the following commands:
| # sudo add-apt-repository ppa:yannubuntu/boot-repair # sudo apt-get update # sudo apt-get install -y boot-repair # boot-repair |
Boot repair repaired grub and created the following link:
http://paste.ubuntu.com/786852/
“Boot successfully repaired.
Please note the following URL:
http://paste.ubuntu.com/786852/
In case you still experience boot problem, indicate this URL to:
boot.repair@gmail.com
or to your favorite support forum.
You can now reboot your computer.”
Link to test:
http://gparted-forum.surf4.info/viewtopic.php?id=14763
Links to read:
http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step
https://help.ubuntu.com/community/Grub2
itsecworks 
Posted on December 29, 2011
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