When you select a check from this menu, the program determines thenumber of hard disk drives installed in your computer. If you havemore than one physical drive, then each time you select a test you seethis prompt:Check which drive (C/D)?Press C or D and then Enter.Seek CheckThis test checks the ability of the read/write heads to locate any partof the hard disk. This action by a read/write head is called a seek.During this test, each head seeks each cylinder of the disk insequence, starting from the center.Select option 1 from the menu to start this test. The program displaysthe number of each cylinder it finds. For example, with a hard disk,the first message you see is:Current cylinder is nnnwhere nnn is the largest cylinder number used on the drive. Thecylinder number counts down to 0. The seek is performed by theread/write heads simultaneously, so you see the cylinder numbersonly once. If no errors occur, the menu reappears.Write, Read CheckThis check tests the ability of the hard disk drive to read and writedata. The test writes to and reads from each sector of the innermostcylinder of the disk, using each head._._“_ .._.__ ,.::::‘:‘:LPerforming System Diagnostics C-27
