Partition problems

[xagentcooper]

Hello.

I am trying to install Ubuntu 11 to dual-boot with Windows 7 (my main os).
Here is screenshot of disk management on Windows http://i.stack.imgur.com/4ZurV.jpg


As you can see I already shrinked volume D: for 16gb, where I am about to install ubuntu. However, in Ubuntu installation, I see no partitions at all.
Then, I launched Disk utility, and here what it showed: http://i.stack.imgur.com/tvZ8i.png


Check the size of last out-of-nowhere partition. Obviously something is wrong with my partition table. What can I do? Thanks.


Also, gparted screenshot http://i.imgur.com/yZOi8.png

[srs5694]

You've probably got a damaged partition table, as described here. (http://www.rodsbooks.com/missing-parts/index.html) If so, the easiest solution is to use my FixParts (http://www.rodsbooks.com/fixparts/) program. If you need a more precise diagnosis, please boot the Ubuntu installer into "live CD" mode and run the following command:



sudo fdisk -lu


Post the results here, between
and tags for legibility.

[xagentcooper]

Here is the fdisk result:



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: 0x4f494d44

Device Boot Start End Blocks Id System
/dev/sda1 2048 31459327 15728640 27 Unknown
/dev/sda2 * 31459328 31664127 102400 7 HPFS/NTFS
/dev/sda3 31664128 504213503 236274688 7 HPFS/NTFS
/dev/sda4 504213507 976784129 236285311+ f W95 Ext'd (LBA)
/dev/sda5 504215552 943214591 219499520 7 HPFS/NTFS

I should run fixparts under ubuntu?

[srs5694]

Yes, FixParts should handle that easily. The problem is a common one: Your extended partition (/dev/sda4) is larger than the disk -- check the end sector value vs. the total number of sectors on the disk. Fortunately, the one partition it contains is within legal limits, so the problem is easily corrected by creating a fresh extended partition (which is what FixParts does, among other things).