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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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 Summary of Common RAID Levels
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RAID-0/1

RAID-0/1126 is Redundant (mirrored) Striped Arrays. RAID-0/1 is a combination of RAID levels 0 and 1. At this level of RAID, a RAID-0 stripe set is created across a 2-disk array, as seen in Figure 407. This method will provide greater I/O perform-ance. A duplicate of this striped set is mirrored on another 2-disk array to provide fault tolerance. This configuration provides the performance bene-fits of a RAID-0 array and the fault tolerance of a RAID-1 array, combined. This is the most costly level of RAID because a minimum of four times the usual disk capacity is required to create a RAID-0/1 array.


Figure 407: Mirrored Striped Arrays: RAID 0/1

 

A RAID-0/1 array can continue to operate even when two disks have failed if the two disks are not part of the same RAID-1 mirror set.


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126. http://www.integratedsolutions.org/raid_ov.htm

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 Summary of Common RAID Levels
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