Section 3-4 Boot Sequences


SubSection 3-4 Boot Sequences
Explain basics of boot sequences, methods,and startup utilities.

Disk boot order/ device priority

http://pcsupport.about.com/od/termsb/g/bootorder.htm
  • Disk boot order describes the order of devices listed in BIOS(Basic Input Output System) that the computer will look for operating system information on
    • After the POST, BIOS will attempt to boot from the first device listed in the boot order. If that device is not
      Device Priority Screen
      Device Priority Screen

      bootable, BIOS will attempt to boot from the second device listed, and so on
      • the device priority list is like your todo list, what is most important would be done or looked at first
  • Device priority can be set within BIOS, you can assign to which device the system boots to first

Boot devices

  • drive that the computer uses to load an operating system during the boot process
    • a boot device can be many types of drives:
      • internal hard disk
      • CD or DVD drive
      • USB(external HDD or optical drives)

Boot options

    • to view the boot menu press F8 during startup
  • there are several options during start up, commonly used for troubleshooting issues:
    • Safe Mode
      • boots the computer with a minimum configuration such as mouse,keyboard, and standard VGA devices. Used to solve problems with a new hardware installation or problems caused by user setings
    • Safe Mode with Networking
      • boots computer with minimum configuration plus networking devices and drivers. Used to solve problems when the new installation or driver files are stored on the network
        Windows Boot Menu
        Windows Boot Menu
    • Safe Mode with Command Prompt
      • boots to the command prompt. used for when safe mode doesn't load the OS. then you use MS-DOS-based utilities to troubleshoot and resolve startup problems
    • Last Known Good Configuration
      • uses the boot settings stored in the registry from the last successful boot. this way any system changes are reversed.
    • Start Windows Normally
      • boots computers as if you didn't enter the advanced boot menu.

Recovery options/ Recovery Console

  • system recovery is resetting a system to a former state or condition
  • there are three recovery options:
    • Startup Repair- automagically fixes problems that are preventing Windows from starting
    • System Restore- restores Windows to an earlier point in time
    • Windows Complete PC Restore- restore your entire computer from a backup
  • You can also use the Command Prompt to perform recovery-related operations via command line or Windows Diagnostic Tool to scan your computer for memory issues
STARTUP_REPAIR4.PNG
Recovery Console


Automated System Recovery (ASR)

  • you can use ASR to recover from a system failure caused by problems with the system/boot volume,such as Registry corruption
  • ASR differs in Vista and XP
    • in XP ASR is a component of Windows Backup (NTBACKUP)
    • in Vista Business, Enterprise, and Ultimate ASR uses the Volume Shadow Copy Service (VSS) and an ASR writer
    • ASR isn't available on Vista Home or Vista Home Premium
  • ASR should be used as your last resort to recover a system, after you'ved tried other recovery options
    • ASR formats your system and boot volumes and doesn't restore user data
Video on ASR

Emergency Repair Disk (ERD)

  • an ERD contains basic system configuration files that you can use to restore your computer to a bootable state if your Registry is damaged or if the operating system is on an NTFS partition that isn't booting
    • when you create an ERD basic system info is placed on the disk and in the %systemroot%\Repair folder on the hard disk
    • an ERD isn't bootable, it's used with the Windows installation CD-ROM
      • it allows you to restore critical system filesand info from the registry
  • ERD can help you:
    • inspect and repair a boot sector
    • inspect and repair the start up environment
    • verify Windows 2000 Professional system files and replace missing or damaged files
      Windows 2000 Professional Backup
      Windows 2000 Professional Backup
  • Whenever you make changes to your computer such as: installing new software,changing software,changing network
    configuration ,changing hardware, or installing new operating system updates- you should update your ERD
  • ERD is available in Windows 2000 Professional Backup
    • does not include Registry information