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I have installed centos on my /dev/sda9.

There is windows 7 on my first partition.

Now I try to install ubuntu on /dev/sda11

While installing,it shows the following error.

migration-assistant needs to mount a partition,but cannot do so because the following mount point could not be mounted:


please close any application using this mount points.

would you like migration-assistant to try to unmount these partition again?

How do I address this error?

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migrated from Jan 29 '12 at 15:47

This question came from our site for system and network administrators.

Do you do a fresh install of Ubuntu from a CD or USB? I am asking because it mentions "migration-assistant", which sounds like you try to get some settings from your centos or something like that. – snies Jan 31 '12 at 8:28
up vote 4 down vote accepted

You can install Ubuntu on your system by following steps:

  1. Boot your system with Ubuntu Live CD
  2. Select 'try Ubuntu'
  3. Open terminal and type sudo ubiquity --no-migration-assistant
  4. Follow with the installation window as usual.

This means you need to disable migration assistant, so you cannot import informations from user and Firefox in CentOS. That's all.

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