Unable to extend the partition check if there is sufficient disk space on the disk

When trying to extend a Windows Server 2003 partition using either Windows DiskPart or Dell’s ExtPart you get a message referencing “unable to extend the partition check if there sufficient disk space on the disk”. However, you do have sufficient disk space available. This happens because you are trying to add unallocated space to the drive that is not contiguous to the unallocated space. The unallocated space can only be added to the last partition not the other partitions before it. So in this case I had a C: drive a D: drive and a P: drive. I was trying to add space to the D: drive. The unallocated space can only be added to the last partition which is the P: drive.

If you were to look at disk management you can see that the unallocated space is at the end of the P: drive and therefore, cannot be added to the C: or the D: drive.

If you want to add the unallocated space to the C: or D: drive then you will need to use a 3^rd party utility such as Paragon or GParted or AOMEI, etc. otherwise you can only add the unallocated space to the last partition.