support.dell.com Basic Troubleshooting 4-139Keys explains the functions of all the keystrokes that can be used in the DellDiagnostics. * Device Group describes the test group that is presently highlighted in the DeviceGroups list on the main menu screen. It also provides reasoning for using sometests.Device is the educational section of the online Help. It describes the function and pur-pose of the highlighted device in the Device Groups area. For example, the followinginformation appears when you select Device for Diskette in the Device Groups list:Diskette drive A:The diskette disk drive device reads and writes data to and fromdiskettes. Diskettes are flexible recording media, sometimescontained in hard shells. Diskette recording capacities aresmall and access times are slow relative to hard disk drives,but they provide a convenient means of storing and transferringdata.!Test provides a thorough explanation of the subtest highlighted for a selected devicegroup. For example, the following description is provided for the Diskette Drive SeekTest:Diskette drive A: - Diskette Drive Seek TestThis test verifies the drive's ability to position its read/write heads. The test operates in two passes: first, seekingfrom the beginning to ending cylinders inclusively, and second,seeking alternately from the beginning to ending cylinders withconvergence towards the middle.6 Versions lists the version numbers of the subtests that are used by the DellDiagnostics.