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chjustc
November 27th, 2008, 07:51 PM
Hi there,

I bought a new desktop (64-bit CPU) that had windows Vista as the only operating system on it. In windows Vista, I could only see C:/ drive. Last night, I tried to install Kubuntu 8.10 for 64-bit machines on it.

The installation disk loaded OK. When the installation came to the part of partitioning hard disk, it found /dev/sda and /dev/sdb. But, there was no partition table on either of them. All the space was free. I could not see any information about the existing windows partition.

Then, I exited the installation, opened a shell prompt, and ran

ubuntu@ubuntu:~$ sudo fdisk -l
I got the results as follows,


Disk /dev/sda: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x1549f232

Device Boot Start End Blocks Id System
/dev/sda1 * 1 76534 614759323+ 7 HPFS/NTFS
/dev/sda2 76535 77826 10377990 7 HPFS/NTFS

Disk /dev/sdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x38fb89b5

Disk /dev/sdb doesn't contain a valid partition table


I guessed the windows Vista partition was on /dev/sda. But, when I went back to the installation again, I still could not see any existing partition.

I was going to install Kubuntu on /dev/sdb and left /dev/sda alone. But, as a precautionary attempt, I want to ask you whehter this is the right thing to do. Any suggestions about why I could not see existing partition during installation and how to fix it.

By the way, I installed ubuntu several times on my own laptop and other desktops without any problem. I was always able to find the existing (windows) partition. My goal was always keeping both windows and ubuntu. So, I always left the windows partition alone or just cut the size of it from the end. But, this time, I don't know what is going on. I don't want to break anything on the windows partition.

Thanks.

chjustc
November 28th, 2008, 03:49 AM
Can anyone help me?

Aussieartist
December 31st, 2008, 06:28 AM
Hi,

I don't know if this is of any help but I'm having a similar problem - sort of... I can't see a missing partition. My HDD is 320gb and when I installed Ubuntu (Whole disk option, not dual boot) I only got a partition of about 285gb... I suspect the missing space is my factory install Vi$ta recovery disk, of course the recovery function does not work (not that I want or need it)... anyhow another thread suggested this diagnostic:


cd ~/Desktop && wget 'http://home.comcast.net/~ubuntu_grub/boot_info_script.txt' && sudo bash boot_info_script.txt


I did it and got all kinds of info, still working through it...
But it did tell me:
=> Drive sdb does not have a valid partition table.
=> Grub is installed in the MBR of /dev/sda and looks on the same drive in
partition #1 for its boot files.

Don't know if this will help you but worth a try?

Cheers
Aussie