VDT (Visual Disk Test) performs various I/O tests on files and devices such as whole hard disks, partitions, and logical volumes. It provides visual feedback on screen while offering a broad selection of addressing methods and test area selection.
ptmax allows you to grow any primary partition in the partition table without any interaction with partition content. It does not move any partitions at all; it just changes the PT entry. It is useful for virtual machines (Xen/kvm) with resized block device and LVM inside.