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20 Cards in this Set
- Front
- Back
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a complete power loss
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blackout
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a copy of data or program files created for archiiving or safekeeping
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backup
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a momentary decrease in voltage, also known as a sag.
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brownout
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a backup method in which only data that has changed since the last full or incremental backup is copied to a storage medium. does not uncheck the archive bits for files it backs up.
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differential backup
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The process of restoring critical functionality and data to a network after an enterprise wide outage that affects more than a single system or a limited group of users
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disaster recovery
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a storage fault tolerance technique in which data is continually copied from one disk to another when it is save.
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disk duplexing
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A RAID techniqe in which data from one disk is automatically copied to another disk as the information is written
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disk mirroring
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A simple imlementation of RAID in which data is written in 64-KB blocks equall across all disks in the array
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disk striping
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A deviation from a specified level of system performance for a given period of time
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failure
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A back up in which all data on all servers is copied to a storage medium, regardless of whether the data is new or changed
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full backup
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A backup in which only data that has changed since the last full or incremental backup is copied to a storage medium. Unchecks the archive bit for every file it has saved
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incremental backup
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An automatic distribution of traffic over multiple links, hard disks, or processors intended to optimize responses.
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load balancing
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A server redundancy measure that uses shared, multiple physical or logical hard disks to ensure data integriy and availability.
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RAID-Redundant Array of Independent Disks.
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An implementation of RAID in which data is written in 64 KB blocks equally accross all disks in the array
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RAID Level 0
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An implementation of RAID that provides redundancy through disk mirroring,
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RAID Level 1
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An implementation of RAID that uses disk striping for data and writes parity error correction code on a separate parity disk.
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RAID Level 3
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The most popular fault tolerant data storage technique in use today, writes data in small blocks across several disks.
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RAID Level 5
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A relatively simple and economical backup method in which data is copied to magnetic tapes
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tape backup
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A battery operated power source directly attached to one or more diveices and to a power supply, which prevents undesired features of the power source from harming the device or interrupting its services
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UPS- uninterruptible power supply
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A program that replicates itself to infect more computers
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virus
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