Backup, Recovery, and Safety Flashcards
Difference between Under-voltage event, Power spikes, and Power surge?
Under-voltage event - reduction in or restriction on the availability of electrical power
Power spikes - significant over-voltage event that occurs for a very short period of time
Power surge - an extended over-voltage event
How to protect against an under-voltage event? (2)
1) Battery backup
2) Line conditioner
Process of creating and storing copies of data to protect against data loss
Backup
Process of restoring data backup during data or system loss
Recovery
4 types of backup / recovery methods
1) Full backup
2) Incremental backup
3) Differential backup
4) Synthetic backup
The backup job that is going to create a file that contains all the data from the source. (Backup that takes up a lot of space and takes a lot of time)
Full backup
Backup job(s) that will only back up things that have changed since the last backup (very quick but takes longer to restore)
Incremental backup
Backup job(s) that backs up all the data that has since been changed since the last full backup (medium recovery and restore time and storage)
Differential backup
Backup that is an optional type of backup that can create full backups with lower data transfer requirements (offline type of backup)
Synthetic backup
True or False? Archive attributes get cleared when you do a Full backup or an incremental backup
True - (Archive attributes are not cleared when you do a differential backup)
MSDS
Material Safety Data Sheet
The period of time between backup jobs
Frequency
Is cloud storage considered off-site or on-site backup?
Off-site
Tape media rotation scheme that allows some of your backup media to be taken to an offsite storage (generation style backup)
Grandfather-Father-Son (GFS)
3-2-1 Backup Rule
3) Three copies of your data
2) Two different types of media
1) One copy being held offline and off-site
Enclosure that provides two or more complete power supplies inside of one
Redundant Power supply
An unexpected increase in the amount of voltage that’s being provided (opposite of a sag)
Surge
A short, transient voltage that can be due to a short circuit, a trip circuit breaker, a power outage, or even a lightning strike (extended surge)
Spike
What can help protect from a Surge or a Spike?
Surge Protector
An unexpected decrease in the amount of voltage provided (opposite of a surge)
Sag
Occurs when the voltage drops low enough that it causes the lights to dim and can cause a computer to shut off (extended sag)
Brownout
Occurs when there is a total loss of power for a long period of time
Blackout
Power supply that combines the functionality of a surge suppressor with a battery backup (used for about a max of 60 min after power out)
Uninterruptable Power Supply (UPS)
An emergency power system used when there is an outage of the regular electric grid power (used for hours after power out)
Backup Generator
Ensures every electrical device has a path to the ground, which is a path that provides the least amount of resistance for electrical current to flow away harmlessly
Grounding
Occurs whenever there’s a path that allows electrons to rush from a statically charged body to a component that has no charge
ESD (Electrostatic Discharge)
Contains all the information about the ingredients, health hazards, precautions, disposal, and first aid information
Material Safety Data Sheet (MSDS)
Backup, Recovery, and Safety review:
1) Disconnect the power
2) Prevent trip hazards
3) Lift w/ your legs not your back
4) Refer to MSDS (Material Safety Data Sheet)
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Karen lives in an area that is prone to hurricanes and other extreme weather conditions. She asks you to recommend an electrical conditioning device that will prevent her files from being corrupted if the building’s power is unstable or lost. Additionally, she would like the computer to maintain power for up to an hour of uptime to allow for a graceful shutdown of her programs and computer. Which of the following should you recommend?
a) Surge protector
b) UPS (Uninterruptable Power Supply)
c) Power distribution unit
d) Line conditioner
b) UPS (Uninterruptable Power Supply)
An uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source becomes too low or the main power fails. A UPS provides near-instantaneous protection from input power interruptions by using a battery backup. The on-battery run-time of most uninterruptible power sources is usually short (less than 60 minutes) but sufficient to properly shut down a computer system.
Which of the following backup rotation schemes uses a three-tiered approach to ensure at least one monthly full backup is conducted?
a) GFS (Grandfather-father-son)
b) Tower of Hanoi
c) 3-2-1 backup
d) FIFO backup
a) GFS (Grandfather-father-son)
The grandfather-father-son (GFS) backup rotation scheme is widely used to combine full and incremental backups to reduce backup time and enhance storage security.
- The grandfather is a full backup that is stored off-site once per month.
- The father is a weekly full backup that is conducted.
- The son is an incremental or differential backup conducted each day.
For example, each Monday a full backup can be conducted which becomes the father. Then, each day of the week a son is created by performing an incremental or differential backup. Once per month, a full backup is conducted to become the grand
You are going to replace a power supply in a desktop computer. Which of the following actions should you take FIRST?
a) Verify proper cable management is being used
b) Dispose of the old power supply
c) Remove any jewelry you’re wearing
d) Use a grounding probe to discharge the power supply
c) Remove any jewelry you’re wearing
Before working on a computer or server, you should always remove your jewelry. Jewelry such as bracelets and necklaces can often dangle and come into contact with sensitive components or electrical connections that can cause damage to the components or injure you. Therefore, all jewelry should be removed before working on an electrical system or computer to reduce the risk of shock.
