I'm running 11.10 and installing 12.04 LTS Beta 1 off a DVD. Using the installation wizard, I picked "Install 12.04 LTS alongside 11.10".

I am presented with a slider with approx 240GB on the left side and 60GB on the right. No other labels are present. I don't want to use the advanced partitioning tool. Which side is which Ubuntu?

Allocate drive space by dragging the divider below BUT WHICH IS WHICH?

If it's relevant: I am installing only for testing purposes (I've been caught by kernel regressions before), so I want to give 12.04 the minimal amount of space required. Once the final release is made, and I've tested that too, my plan is to remove the second partition and upgrade 11.10 to 12.04.

  • The left side is the current installation and the right is the one you would be installing. But, just to be sure, I am confirming it.
    – jokerdino
    Commented Mar 5, 2012 at 11:43
  • @jokerdino thanks for taking the time to confirm it, I don't feel comfortable continuing not knowing!
    – lofidevops
    Commented Mar 5, 2012 at 13:14
  • 2
    created a usability bug to help avoid this question in future :) bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/947107
    – lofidevops
    Commented Mar 5, 2012 at 13:14
  • I now confirm my previous statement. Just tried a live CD.
    – jokerdino
    Commented Mar 5, 2012 at 14:23
  • @jokerdino thanks! please add it as an answer (and if you don't mind, explain how you confirmed it)
    – lofidevops
    Commented Mar 6, 2012 at 4:19

1 Answer 1


When logged in on 11.10, open a terminal (Ctrl+Alt+T) and type the following:

cat /etc/mtab

There you will find which partitions are currently mounted. The first is the location of the partition (for instance: /dev/sda2), the second parameter gives you where it is mounted. Look for / or /home/.

Write down the partitions (/dev/...).

Reboot from the DVD. The partitions you wrote down were used for 11.10, so you don't want to touch that. The /dev/... you didnt saw before is the new partition made for 12.04.

  • I think these instructions would help for using the advanced partition manager, but I'm trying to avoid that - the simple partition manager just shows two grey blocks separated by a slider - the only labels they have are the sizes, no "/dev/sda1", "Ubuntu 11.10", or anything like that - I'll try get a screenshot and add it to the question
    – lofidevops
    Commented Mar 5, 2012 at 10:37
  • Ah ofcourse, then indeed there isn't a possibility to know for sure. You could assume it is the one most to the right, but that is just a guess.
    – xatr0z
    Commented Mar 5, 2012 at 10:43

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