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I've just installed Ubuntu and I think that I did a mistake because my pc boots every time directly to Windows 7 that was preinstalled.

I had 2 partitions in a 1GB hard disk. 500GB NTFS for sharing with Ubuntu and 300GB NTFS for Windows. (and 200GB unallocated)

That's what I did:

  1. I download Ubuntu 13.04 .iso
  2. Burn it to a USB successfully with LiLi USB Creator
  3. Boot from usb and select install Ubuntu
  4. Create new logical partition of type swap 20GB
  5. Create new primary partition of type EXT4 180GB for / and then I select that as the device for boot loader installation.

As I remember both partitions I created were at the end of the disk, but I am not sure. Also every time I select Try Ubuntu from live USB it crashes or is deadly slow, so please dont suggest me to fix it from there.

Should I reinstall or is there another way to solve this?

Bonus Question: What is the difference between /dev/sdX and /dev/sdXY ?

share|improve this question
You have to install grub2's boot loader to the MBR or sda not the partition sdaY where Y is partition number. You need a Linux repairCD/DVD/flash to reinstall grub. Usually booting live installer is quickest & easiest. But you can down load a lightweight version of Boot-Repair. help.ubuntu.com/community/Boot-Repair sourceforge.net/projects/boot-repair-cd/files –  oldfred Sep 21 '13 at 3:43
Thanks that worked for me, I didn't try yet to boot Windows via grub2 but lets hope there will be no problem. –  Nikos Gr Sep 21 '13 at 13:15

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