Configuring Your Server 4-39Spanning of RAID1Data to be recorded is distributed to two HDDs in mirroring mode. Then, each mirrored data iswritten onto HDD by striping. Owing to this feature, high disk access performance of RAID0 and,in addition, high reliability of RAID1 can be achieved.Disk array controllerHDD 1 HDD 2Stripe 1HDD 3Stripe 3Stripe 1Stripe 3Stripe 2Stripe 4Stripe 5 Stripe 5 Stripe 6HDD 4Stripe 2Stripe 4Stripe 6RAID1 RAID1RAID0Spanning of RAID5Data is distributed to HDDs by striping with distributed parity, and then written onto HDDs bystriping. Owing to this feature, high disk access performance of RAID0 and, in addition, highreliability of RAID5 can be achieved.Disk array controllerHDD 1 HDD 2Stripe 1HDD 3Stripe 6Stripe 2Parity (5, 6)Parity (1, 2)Stripe 5Parity (9, 10) Stripe 9 Stripe 10HDD 4Stripe 3Stripe 8Parity (11, 12)HDD 5 HDD 6Stripe 4Parity (7, 8)Stripe 11Parity (3, 4)Stripe 7Stripe 12RAID1 RAID1RAID0
