Difference between raid 5 and raid 6

[Guest]

difference between raid 5 and raid 6

 

[howardp6]

RAID 6 uses two independent parity schemes that are distributed across the drives. It requires at least four drives versus a minimum of three drives for RAID 5. Since two parity schemes must be computed the contrioller overhead is greater than that of RAID 5. RAID 5 can suffer one drive failure and RAID 6 can suffer multiple drive failures depending on the number of drives in the array. RAID 6 is implemented through hardware (drive controller), whereas RAID 5 can be either software or hardware. RAID 6 is used in Faile and Application Servers, Database Servers, etc. As always you should backup your data and not depend on RAID.

 

[RRO]

a good website you can read about the differences :
http://raid-recovery-online.com/raid_5_recovery/
http://raid-recovery-online.com/raid_6_recovery/

besides the explanation, you can watch a visual scheme.

 

[paulcooperorama]

there are performance benifits to a raid 6 also vs a raid 5 also look a the size of your drives and amount. if you are only using 4 drives then go with a raid 5 if you have more then 5 and the drives are over 500 gb use a raid 6... you will loose 2 to the parity but the advantage of data security will out way the loss of the drive. you will gain in data access time due to the more drives having less data on them this will increase the seek and write times.