- Notes, cautions, and warnings
- Copyright
- About your system
- Using The System Setup And Boot Manager
- Installing System
Components
- Recommended Tools
- Opening And Closing The System
- Bezel
- Chassis intrusion switch
- Inside the system
- Thermal Sensor
- Power switch
- Input/Output (I/O) panel
- Hard drives
- Removing the hard drive cage
- Installing the hard drive cage
- Removing a 3.5-inch hard drive carrier from the hard drive cage
- Installing a 3.5-inch hard drive carrier in the hard drive cage
- Removing a 2.5-inch hard drive(s) from the optical drive bay
- Installing a 2.5-inch hard drive(s) in the optical drive bay
- Removing a 3.5-inch hard drive carrier from the hard drive bay
- Installing a 3.5-inch hard drive carrier in the hard drive bay
- Removing A Hard Drive From A Hard-Drive Carrier
- Installing A Hard Drive Into A Hard-Drive Carrier
- Optical drive
- System memory
- Sample memory configurations
- System fan
- Expansion cards
- Processors
- Power supply unit
- System Battery
- System board
- Troubleshooting
your system
- Power LED Diagnostics
- Memory Beep Code
- Troubleshooting System Startup Failure
- Troubleshooting external connections
- Troubleshooting the video subsystem
- Troubleshooting a USB device
- Troubleshooting a serial I/O device
- Troubleshooting A NIC
- Troubleshooting A Wet System
- Troubleshooting A Damaged System
- Troubleshooting the system battery
- Troubleshooting A Non-Redundant Power Supply
- Troubleshooting cooling problems
- Troubleshooting The System Fan
- Troubleshooting System Memory
- Troubleshooting An Optical Drive
- Troubleshooting A Hard Drive
- Troubleshooting Expansion Cards
- Troubleshooting The Processor
- Using System Diagnostics
- Jumpers and connectors
- Technical Specifications
- System Messages
- Getting help
Dell PowerEdge T20 Owner's Manual
Choosing The System Boot Mode
System
Setup enables you to specify the boot mode for installing your operating
system:
- Legacy boot mode (the default) is the standard BIOS-level boot interface.
- Unified Extensible Firmware Interface (UEFI) boot mode is an enhanced 64-bit boot interface based on UEFI specifications that overlays the system BIOS.
In System Setup, select boot mode in the Boot List Option field of the Boot Sequence screen. Once you specify the boot mode, the system boots in the specified boot mode and then proceeds to install your operating system from that mode. Thereafter, you must boot the system in the same boot mode (Legacy or UEFI) to access the installed operating system. Trying to boot the operating system from the other boot mode will cause the system to halt at startup.
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