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Old 28th February 2009
J65nko J65nko is offline
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Join Date: May 2008
Location: Budel - the Netherlands
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I am afraid it will be rather difficult to do what you want

A standard MBR only can accomodate 4 slices (1-4, or 0-3). An extended slice/partition is a way to circumvent the 4 slice limit, it just acts as a container for one or more multiple logical subpartitions or slices.
A MBR can only have one single extended partition, optionally in combination with 1 to 3 primary slices/partitions.

You have 3 primary partitions:
  • partition 0: Netbsd
  • partition 1: NTFS
  • partition 3: Linux swap
The second slot of the MBR is occupied with an extended partition, containing one logical partition, the Linux/Ubuntu native partition.

If you have a thorough detailed knowledge of the MBR and the partition conventions, you could attempt a conversion of the logical Linux/Ubuntu partition into a primary partition. But even then partition boot record (PBR) issue could prevent you from using it. This PBR issue could also affect you if you backup the current Ubuntu install.

The simplest way, for a more simple layout would be to remove the extended partition, and it's single logical one. Then create a primary Linux partition and reinstall Ubuntu, hoping it will accept your freshly created primary Linux native partition. But that means to goodbye to your Linux/Ubuntu data.

Both gparted and the Ubuntu installer probably have trouble with the NetBSD partition because of a lack of understanding of the NetBSD disklabel.
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