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GNOME Disks is a graphical front-end for udisks. It can be used for partition management, S.M.A.R.T. monitoring, benchmarking, and software RAID (until v. 3.12). An introduction is included in the GNOME Documentation Project.
Disks used to be known as GNOME Disk Utility or palimpsest Disk Utility. Udisks was named DeviceKit-disks in earlier releases. DeviceKit-disks is part of DeviceKit which was planned to replace certain aspects of HAL. HAL and DeviceKit have been deprecated.