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RAID 6 is essentially an extension of RAID level 5 which allows for additional
fault tolerance by using a second independent distributed parity scheme (dual
parity)
Data is striped on a block level across a set of drives, just like in RAID 5,
and a second set of parity is calculated and written across all the drives;
RAID 6 provides for an extremely high data fault tolerance and can sustain
multiple simultaneous drive failures
Perfect solution for mission critical applications
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More complex controller design
Controller overhead to compute parity addresses is extremely high
Write performance can be brought on par with RAID Level 5 by using a custom ASIC
for computing Reed-Solomon parity
Requires N+2 drives to implement because of dual parity scheme
File and Application servers
Database servers
Web and E-mail servers
Intranet servers
Excellent fault-tolerance with the lowest overhead
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