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Transcript of 1 Computer Maintenance Disaster Recovery and Preventative Maintenance Copyright © Texas Education...
1
Computer Maintenance
Disaster Recovery and
Preventative Maintenance
Copyright © Texas Education Agency, 2013. All rights reserved.
Course Objectives
Define computer disaster recovery plan Design and implement a disaster recovery
plan Define preventative maintenance Understand the reasoning behind
preventative maintenance
Copyright © Texas Education Agency, 2013. All rights reserved. 2
Computer Disaster Recovery Plan A backup plan that is designed to restore and
recover data and computer functionality in the event of a disaster such as a computer or server failure
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Computer Disaster Recovery Plan Plans emerged in the mid-1970s and grew as
businesses became more reliant on IT (Information Technology) and computers in the workplace
Today, businesses spend upwards of 5% of their IT budgets on disaster recovery planning
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Computer Disaster Recovery Plan What can happen when there is no computer
disaster recovery plan? company/customer data is lost company operations may become disrupted operations may never return to the pre-disaster
state Statistics: Businesses that encounter a computer disaster
without a recovery plan Half never reopen or close the business within 2 years Less than 10% of businesses survive without a recovery plan
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What can happen when there is no computer disaster recovery plan? Software Failure: a crash or cessation of
processing because of a logic error in a program or key files have become corrupt or damaged
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Computer Disaster Recovery Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
What can happen when there is no computer disaster recovery plan? Hardware Failure - computers fail in varying
degrees of severity. The worst failures impact the ability for the computer to function at all
Hard drive failure - The computer is unable to load the operating system
Video card failure - The screen will be black with no signal. Other component failure - Software can affect hardware by
corrupting its firmware and causing the hardware to overheat and fail.
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Computer Disaster Recovery Plan
Copyright © Texas Education Agency, 2013. All rights reserved.
Preventative strategies: data backup redundant hardware setups security software defragmentation proper cooling
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Computer Disaster Recovery Plan
Data backup: making copies of important data, files, and computer system settings On-site backups
Raid 0: The computer has two of the same-sized hard drives where the same data is written to both drives Is performed through BIOS and operating system settings Quickest means of recovery when a hard drive failure
occurs because of the system’s redundancy Manual on-site backup: Data is backed up to another
drive or location at regular intervals
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Computer Disaster Recovery Plan
Off-Site Backup: Utilizes servers or cloud-based systems for backup locations
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Computer Disaster Recovery Plan
Security software: software applications are designed to protect the computer and its systems Antivirus, Firewall, and other security software suites allow
for better protection of a computer’s files and systems
Defragmentation: the process where files on the hard drive are put back into their proper order, increasing performance and proper file management
Proper cooling: heat causes hardware failures. Proper cooling is necessary for a computer to operate correctly
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Computer Disaster Recovery Plan
Detection strategies: software notifications system performance tests user detection
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Computer Disaster Recovery Plan
Computer Disaster Recovery Plan: Detection Software notifications: Operating systems
today incorporate some form of software or hardware diagnostic tool to aid the user in troubleshooting the computer They are designed to notify the user of a potential
malfunction or to run a check for a fault
System performance test: Looking at the activity log is helpful in troubleshooting the computer
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Computer Disaster Recovery Plan: Detection User Detection: The user generally knows
what is supposed to happen with a particular software package or operating system. When things don’t work the way they are supposed to, a user detects the problem
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Computer Disaster Recovery Plan Corrective/Reactive strategies
identify the problem assess the areas that are affected repair or replace the affected hardware/software confirm through testing that the problem has been
corrected
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Computer Disaster Recovery Plan: Corrective Strategy
Identify the problem: Is the problem software or hardware related?
What is affected: diagnose hardware failures using the utility that comes pre-installed with the operating system. Replace any hardware that might be faulty. Software is usually diagnosed by the user or with the appearance of error messages
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Repair/Replace Software: repair/restore/reinstall software when it
fails to function correctly. Hardware: Replace faulty hardware and reinstall
drivers as necessary Confirm through testing that the problem has been
resolved
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Computer Disaster Recovery Plan: Corrective Strategy
Computer Preventative Maintenance The process and practice of keeping a
computer in good working order Involves maintaining both the hardware and the
software on the computer Should be performed every 3-6 months
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Hardware Listen - while the computer is running, listen for odd
sounds such as clicking or other abnormal noises Clean dust out - using a vacuum, place suction at
both the exhaust and intake vents on the computer where buildup is visible
This returns airflow to components that generate heat and allows the machine to run more efficiently while decreasing the likelihood of failure
Canned air is also an option for blowing dust from a computer. Open the case for best results
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Computer Preventative Maintenance
Computer Preventative Maintenance
Look at computer specs: make note of the hardware in the machine
As a computer ages, it has trouble keeping up with newer software requirements
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Software Backup: make copies of important files. Can be
done on external media, a hard drive, online backup, or to a virtual location like the cloud
Check computer security: periodically, perform an entire scan of the computer’s hard drive To perform a scan, open the security software
application and select the complete system scan Make note of security software renewal dates. If the
subscription has expired, you will not have active protection.
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Computer Preventative Maintenance
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Software Empty cache, delete any unwanted or temp
files - clear the cookies from your Internet browser, delete emails, empty the trash, and delete any temporary files by performing a disk cleanup and defragmentation of the hard drive
Update drivers – will enhance the computer’s performance and make it more stable
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Computer Preventative Maintenance
A dirty computer will not perform well!
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Computer Preventative Maintenance
The reason for preventative maintenance to prevent unnecessary and premature hardware
failures to ensure that software is up to date and
functioning at optimal levels for an extra degree of protection in backing up
key files and documents to help extend the life of the computer
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Computer Preventative Maintenance
Even computers that are properly maintained and upgraded eventually reach a point where replacement is necessary
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Computer Preventative Maintenance
Independent / Group Work
Group
1. Get into your groups.
2. Discuss 3 or more preventative measures you can take to protect your personal computer.
3. Demonstrate one of the preventative measures you chose and present it to your peers on the computer at the front of the classroom.
4. Detail, in writing, the measures your group took.
5. Explain in your summary the reasons behind each maintenance task you chose and why they are important.
Individual
1. Detail a “computer disaster recovery plan” for your computer at home.
2. This plan should encompass everything covered in the presentation and be posted by your computer at home.
3. Turn in a copy of the written plan and, optionally, a picture of that plan posted by your computer.
26Copyright © Texas Education Agency, 2013. All rights reserved.