Looking at this related question: Unable to extend partitions using GParted, I followed the link to Moving Space Between Partitions.

Following the cookbook in the latter, I have an unallocated 14 Gb adjacent to the partition I'd like to extend. This is what the partitions look like before:

GParted picture

But when I select the /dev/sdb1 partition and try to resize/move it in GParted, I can't extend: cannot extend

(Note that the up-arrow for increasing the size is grayed out.)

How can I extend /dev/sdb1 over the adjacent unallocated space?

  • Delete the extended partition sdb2 first.
    – mook765
    Mar 15, 2020 at 16:43
  • thanks, @mook765, deleting the extended partition was key. GParted is now able to resize /dev/sdb1. If you make your comment into an answer, I will be glad to accept it.
    – rajah9
    Mar 15, 2020 at 19:19

1 Answer 1


Partitions cannot overlap and next to the partition you want to grow (sdb1) is the extended partition sdb2.

The purpose of the extended partition is to hold logical partitions, but in your case, a logical partition does not exist, so the extended partition is not needed and can simply be deleted.

After deletion of sdb2 you will be able to increase the size of sdb1.

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