How much capacity is used for parity information?
RAID-K in the Premiere line reserves space for parity information, and this space is not available for storing content on the server. The amount of space allocated to parity information is equal to the capacity of the largest disk cartridge in the array. For example, a RAID-K array with fourteen 4 TB Disk Cartridges uses 4 TB for parity information. A RAID-K array with eight 3 TB Disk Cartridges and six 4 TB Disk Cartridges also uses 4 TB for parity information. A hot spare disk cartridge is not incorporated into a RAID-K array and does not affect the amount of space allocated to parity information.