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travega
Asked: 2013-05-06 15:21:15 +0800 CST

How to boot copied partition

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I have just ghosted an Ubuntu (12.04) instance from a 200GB HD to a 1TB HD. The ghosted instance has two mounted storage partitions both of about 100GB each and I have the following partition table:

Partition      File System      Mount Point
/dev/sda1      ext4             /
/dev/sda2      extended         
  /dev/sda5    linux-swap       
/dev/sda3      ext4             /development
/dev/sda4      ext4

/dev/sda4 is a copy of /dev/sda1, just on a larger partition. I now want the /dev/sda4 partition to be mounted at root (/) so that it is the default boot partition.

Finally a question - how can I change the /dev/sda4 partition to be mounted at root?

mount

2 Answers

  1. Best Answer

    /etc/fstab should be modified with the entries for the new partition. It has parameters to define mountpoint and whether to be mounted automatically.

    If you're looking for detailed explanations, look here: https://help.ubuntu.com/community/AutomaticallyMountPartitions https://askubuntu.com/questions/164926/how-to-make-hdds-mount-at-startup-in-ubuntu-12-04

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  2. You have to change the boot loader configuration. That is probably Grub or Grub2. There is a kernel parameter root=... with the device name, device ID, file system label or file system UUID. You have to change that to the new partition. On /dev/sda4 you have to change the entry in /etc/fstab.

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