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20 Cards in this Set

  • Front
  • Back
a complete power loss
a copy of data or program files created for archiiving or safekeeping
a momentary decrease in voltage, also known as a sag.
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.
differential backup
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
disaster recovery
a storage fault tolerance technique in which data is continually copied from one disk to another when it is save.
disk duplexing
A RAID techniqe in which data from one disk is automatically copied to another disk as the information is written
disk mirroring
A simple imlementation of RAID in which data is written in 64-KB blocks equall across all disks in the array
disk striping
A deviation from a specified level of system performance for a given period of time
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
full backup
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
incremental backup
An automatic distribution of traffic over multiple links, hard disks, or processors intended to optimize responses.
load balancing
A server redundancy measure that uses shared, multiple physical or logical hard disks to ensure data integriy and availability.
RAID-Redundant Array of Independent Disks.
An implementation of RAID in which data is written in 64 KB blocks equally accross all disks in the array
RAID Level 0
An implementation of RAID that provides redundancy through disk mirroring,
RAID Level 1
An implementation of RAID that uses disk striping for data and writes parity error correction code on a separate parity disk.
RAID Level 3
The most popular fault tolerant data storage technique in use today, writes data in small blocks across several disks.
RAID Level 5
A relatively simple and economical backup method in which data is copied to magnetic tapes
tape backup
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
UPS- uninterruptible power supply
A program that replicates itself to infect more computers