Gparted Error "Unable to satisfy all the constraints on the partition"

Solution 1:

I'm not 100% positive, but I suspect this is your problem:

/dev/sda6      1532825600  1780301823   123738112   83  Linux
/dev/sda7      1780301824  1805438975    12568576   82  Linux swap / Solaris

Most partitioning tools put at least one empty sector between logical partitions and use that space to store the Extended Boot Record (EBR) that describes the following logical partition. In the case of your /dev/sda6 and /dev/sda7, though, there's no gap between those two partition. This is legal, provided the EBR can be tucked away somewhere else. (sfdisk can do this, for instance.) It's possible that libparted (upon which parted, GParted, and several other tools are based) is becoming confused by this. I've not tested how libparted reacts to such disks, though, so I can't be sure that my guess is right.

If this is the problem, then I can think of at least two solutions:

• Using any tool that will enable you to do so, delete /dev/sda7. It's swap space, so it doesn't hold any critical data. You can re-create it later, with a gap between it and /dev/sda6. When you re-create your swap partition, you'll probably have to edit /etc/fstab to point to the new swap space.
• You've got one free primary partition, so you can use FixParts (part of the gdisk package in Ubuntu) or the EaseUS tool you used initially to convert /dev/sda7 into a primary partition. Primary partitions don't need EBRs, so the problem should then go away. This method has the advantage that you won't need to edit /etc/fstab, but you'll also have no free primary partitions. If you really want your swap to be on a logical partition, you can shrink either partition by 1MiB, which will open up enough of a gap that you'll be able to convert back and have it work.