How Long Does a Disk Resize Take? Depending on the size of the disk you want to increase or decrease the resize process takes between 3 and 45 minutes. Your server will be completely down during this period, there is also no way for us to stop the resize once it has been started If you require a disk resize we would recommend doing this out of hours and giving yourself a couple of hours maintenance window for it to complete. It's always good practice to take regular backup snapshots of your server - particularly before resizing disks or resources