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Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 10: The Small Computer System Interface, SCSI
      9  RAID
           9  RAID Levels

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RAID-1

RAID-1122 is known as mirroring123 or Duplexing124. In a mirrored array, a complete copy of all data is written to both drives simultaneously, as illustrateed in Figure 405. RAID-1 provides full fault tolerance for a single drive failure. There is no significant performance degradation when accessing the remaining drive. The remaining drive operates without any fault tolerance until the failed drive is re-placed and the mirror set is rebuilt.


Figure 405: Data Mirroring in RAID-1

 


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122. http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci214332,00.html

123. http://snipurl.com/DISK_Duplexing

124. http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci796504,00.html

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