Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When creating a bootable usb stick for Ubuntu 12.04 server edition, the startup disk creator pops up the "installation complete" window and another window titled "Upgrade volume detected" which says the following:

A distribution volume with software packages has been detected.

Would you like to try to upgrade from it automatically?

With options to cancel or Run upgrade. What distribution volume is it talking about and where did it detect it? What does "upgrade from it automatically mean"?

share|improve this question
up vote 3 down vote accepted

When you mount a CD or USB device that has an Ubuntu OS on it (either the same version or a newer, I think), Ubuntu will detect it and offer to upgrade. So, my guess is that after you create the bootable USB or CD, it gets automatically mounted, and Ubuntu goes through the normal detection routine.

You can confirm this by unmounting, then reinserting the device to see if you get the same message.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.