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MBR drive management

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#1 ohdalai


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  • Local time:07:09 AM

Posted 04 November 2016 - 04:54 AM

My hard drive (master boot record) has 5 primary partitions:

  •     Boot partition, 400 GB (Windows 7 installed)
  •     Primary partition, 100MB (System reserv.)
  •     Primary partition, 50 GB (Ubuntu installed)
  •     Primary partition, 2 GB
  •     Primary partition, 2 GB
  •     There is no unallocated space


  1.     How is it possible that I have more than 4 primary partitions on a MBR drive?
  2.     Can I delete one of those 2GB partitions that I didn't create?
  3.     How many more partitions can I create?
  4.     What would be the best way to install another OS (Windows 8 or Windows 10)?

Edited by hamluis, 16 February 2017 - 05:52 PM.
Moved from Win 7 to Disk Management - Hamluis.

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#2 JohnC_21


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Posted 04 November 2016 - 09:31 AM

I am not completely sure but if the Ubuntu partitions are logical Windows incorrectly labels them as Primary. 


Open the Disk Utility in Ubuntu and look for an Extended Partition. You can also open a terminal in Ubuntu and type


parted    It should detect sda



This will list your partitions and if they are primary or extended.

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