In HP Storage System...what is the difference of RAID 5 vs. RAID 6?

The major different is number of HDD to be used for raid 6 is 4 and raid 5 we need atleast 6.

RAID level configurations are Vendor independent.

RAID 5 uses 1 Disk as Fault tolerance where as RAID 6 uses 2 Disks.

RAID 5 can be either software or hardware

RAID 6 is implemented through hardware

RAID 6 uses both striping and parity techniques but unlike RAID 5 utilizes two independent parity functions which are then written to two member disks.

RAID 5 uses striping with parity data in distributed blocks across all member disks. A RAID 5 volume is tolerant of a single disk failure

RAID 6 uses striping with parity data in distributed blocks across all member disks

 

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.  

RAID 6 is tolerant of two disk failures at a time. But RAID 5 is tolerant of only one disk failure at a time.

RAID 6 uses two independent parity. But RAID 5 uses distributed parity.