NEC Express5800 User Manual page 113

RAID10
Data to be recorded is distributed to two hard disk drives in mirroring mode. Then, each mirrored
data is written onto hard disk drive by striping. Owing to this feature, high disk access performance
of RAID0 and, in addition, high reliability of RAID1 can be achieved.
HDD 1
Stripe 1
Stripe 3
Stripe 5
RAID50
Data is distributed to hard disk drives by striping with distributed parity, and then written onto hard
disk drives by striping. Owing to this feature, high disk access performance of RAID0 and, in
addition, high reliability of RAID5 can be achieved.
HDD 1
Stripe 1
Stripe 6
Parity (9, 10)
HDD 2
Stripe 1
Stripe 3
Stripe 5
RAID1
HDD 2 HDD 3
Stripe 2 Parity (1, 2)
Parity (5, 6) Stripe 5
Stripe 9 Stripe 10
RAID5
RAID Controller
HDD 3
Stripe 2
Stripe 4
Stripe 6
RAID0
RAID Controller
HDD 4
Stripe 3
Stripe 8
Parity (11, 12)
RAID0
Configuring Your Server 4-43
HDD 4
Stripe 2
Stripe 4
Stripe 6
RAID1
HDD 5
Stripe 4
Parity (7, 8)
Stripe 11
RAID5
HDD 6
Parity (3, 4)
Stripe 7
Stripe 12