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This shows the more common BIOS settings. They include the date and time and the IDE disk drive configuration. Because this is a SCSI system, we have no IDE hard drives. In 486 and earlier computers, you often had to know a "drive number". In more recent IDE arrangements there is an "auto-detect" of the drive geometry. This BIOS even has a diagnostic mode where it will query the IDE drives and report the drive geometry. The drive geometry only applies to hard drives. CD-ROMs and drives like ZIP’s generally do not need any drive geometry settings.