IT Essentials One Chapter Thirteen

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IT Essentials OneChapter Thirteen

• Troubleshooting Software

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Introduction
Quotes of the day "If Stupidity got us into
this mess, then why can't it get us out?" " -
Will Rogers
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First Steps

• Establish what user was doing to get the error
  message
• Reproduce the error symptoms, step by step
• Identify any recent changes to the system, any
  software installed or deleted
• Identify whether it is a hardware or software
  fault

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Boot Disks

• All administrators should have one with the above
  files included
• Allows for repair or reinstalling of OS

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Creating a Windows 98 start-up disk

• Label a blank diskette "Windows 98 Start-up
  Diskette".
• Click the Start button, point to Settings, and
  click Control Panel.
• Double-click the Add/Remove Programs icon.
• Click the Start-up Disk tab and then click Create
  Disk.
• Insert the blank diskette into the diskette drive
  and click OK.

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Error Codes Start-up Messages
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Win 9x Error Log Files
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System Editors

• SYSEDIT.EXE
• System editor tool. Used to modify text files
  such as the .INI files and CONFIG.SYS
  AUTOEXEC.BAT
• POLEDIT.EXE (Win 9x)
• System Policy Editor. Used to set up different
  security restrictions for different users.
• Group Policy Editor (GPE) (Win 2000)
• Used to control the programs that are available
  to users, the programs that appear on a users
  desktop and the start menu options.

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Registry Files
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Registry Keys

• HKEY_USERS
• Contains desktop, Windows environment custom
  software settings
• HKEY_CURRENT_CONFIG
• Contains data on active hardware profile
• HKEY_CLASSES_ROOT
• Contains software configuration data
• HKEY_CURRENT_USER
• Contains data about the current user logged in
• HKEY_LOCAL_MACHINE
• Contains all configuration data for the local
  computer

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Registry Editing Tools

• REGEDIT.EXE
• Mainly in Win9x
• REGDIT32.EXE
• Only in Win2000
• Norton WINDOCTOR
• McAffee Registry Wizard
• PC Doctor Oncall

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Backup Types

• Normal or Full Backup
• Done daily
• Requires only one tape (or set) to restore
• Resets the archive bit.

Data in GB
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Backup Types

• Incremental Backup
• Backs up all the files that have been modified
  since last full backup or incremental backup
• Restore full backup then daily in order
• Resets the Archive bit

Data in GB
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Backup Types

• Differential Backup
• Backs up all the files that have been modified
  since last full backup
• Restore full backup then last day
• Does not reset the archive bit

Data in GB
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Backup Types

• Copy Backup
• Backs up user selected files
• Does not reset the archive bit.

• Daily Backup
• Backs up only the files that are modified on the
  day of backup
• Does not reset the archive bit

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Rotation Schedule

• Daily rotation
• No backup if media becomes corrupt
• Nothing stored off-site
• Weekly rotation
• Can only go Back one week
• Monthly rotation
• Nine tapes (Monday Friday and four weekly
  Fridays)
• Will lose data since Friday tape if longer than
  one week old
• Yearly rotation
• Daily tapes, weekly Friday tapes, last month day
  tape
• Allows restore
• Daily for week
• Weekly for a month
• Monthly for a year
• Grandfather Father Son
• Daily tapes Son
• Monthly tapes Father
• Yearly tapes Grandfather

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Baseline Performance Levels

• Processor
• Under 80 utilisation
• Memory
• Under 70 utilisation
• No more than 20-30 pages per second written to
  virtual memory
• Hard disk
• Under 80 read/write time
• Under 90 disk utilisation
• Network interfaces
• Under 40 for Ethernet
• Under 80 for Token Ring

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Questions ?