Ubuntu installer not recognizing partitions

[sadiq-ali]

I'm trying to install Ubuntu 10.10 from my live USB disk. In My computer, it is showing all drives correctly, but when I try to install using the installer on desktop, it is showing the whole hard disk as free space and no partitions at all.

when I tried 'sudo parted' and then print command, I got the below error message.

Error: Can't have a partition outside the disk!

I formatted the C drive from linux using ext4 filesystem.

How can I make the ubuntu installer recognize my partitions?

[wet-willy]

Is it mounted when you go to do the install?

[sikander3786]

Welcome to the forums :-)

From your Bios menu, switch your HDD mode to "ahci" or compatible if available.

Try installation again and if that doesn't yet show the partitions, post the output of


sudo fdisk -l

[srs5694]

The "sudo fdisk -l" command that sikander3786 suggests will display results with cylinder precision, which is likely to be inadequate for proper diagnosis. You must add a "-u" option to get sector precision, as in:



sudo fdisk -lu


Chances are your problem is the one described on this Web page of mine. (http://www.rodsbooks.com/missing-parts/index.html) I recommend you read it and post back here (including the "sudo fdisk -lu" output, presented between
and tags for legibility) if you've got more questions.