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I had installed Ubuntu to my Dell Inspiron laptop with 3 partitions.

After I installed Windows I was unable to create new partitions, since I already reached the maximum number of partitions.

So I deleted the Ubuntu partitions and I installed Windows on two partitions. So I have got 4 partitions with Windows.

Then I tried to install the Ubuntu that previously deleted(on unallocated space). But the problem is that unallocated partitions are grayed out and can't be used. Now what can I do?

Pilot6
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kasun chanaka
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  • If you have MBR partition table, you can't have more that 4 primary partitions. You needed to do 1 extended. – Pilot6 May 27 '15 at 19:17
  • @Pilot6 thanks for your response. That is the big problem me. How to change the primary partitions in to the logical partitions? – kasun chanaka May 27 '15 at 19:22
  • You can't. You need to remove one of existing partitions, create extended, and then any number of logical in it. – Pilot6 May 27 '15 at 19:33
  • I made an answer of these comments. – Pilot6 May 27 '15 at 19:42
  • possible duplicate of [My partition table is facing limitations; having problems creating more partitions](http://askubuntu.com/questions/224927/my-partition-table-is-facing-limitations-having-problems-creating-more-partitio) – Rod Smith May 28 '15 at 13:24
  • other possible dupe: http://askubuntu.com/q/149821/178596 - all thesesquestions don't really have a consistent answer.... – Wilf Jun 06 '15 at 18:31

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You can not have more that 4 primary partitions on MBR disk.

You need to remove one of the existing partitions and create an extended in it its place.

Then it will be possible to create logical partitions in extended.

Pilot6
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