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drives in the RAID array is written to the parity drive. If one of the data drives fails, the XOR of the remaining drives is identical to the data of the lost drive. Therefore, when a drive is lost, recovering the drive is as simple as copying the XOR of the remaining drives to a fresh data drive.
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uses a parity drive to create a system that is both fault tolerant and, because of
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function which means 'one or the other, but not both'. The XOR of all of the
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One way to implement a parity drive in a RAID array is to use the
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86:"What does the parity bit do in RAID?"
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123:. You can help Knowledge (XXG) by
73:Definitions of RAID configurations
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373:Non-RAID drive architectures
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397:Computer hardware stubs
75:Retrieved on 2010-11-15
233:Disk array controller
90:ComputerWeekly.com
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117:computer hardware
28:array to provide
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287:Availability
271:Non-standard
243:Parity drive
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125:expanding it
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45:exclusive or
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18:parity drive
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324:Scalability
317:Replication
253:RAID levels
215:Disk arrays
386:Categories
362:Oracle ZFS
339:Interfaces
329:Throughput
312:Parity bit
280:Principles
60:References
24:used in a
22:hard drive
200:Redundant
307:Failover
261:Standard
347:bioctl
266:Nested
34:RAID 3
357:mdadm
207:disks
203:array
115:This
20:is a
392:RAID
352:geom
191:RAID
121:stub
53:data
26:RAID
388::
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16:A
183:e
176:t
169:v
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