NEC Express 5800 User Manual page 327

RAID10
Data to be recorded is distributed to two HDDs in mirroring mode. Then, each mirrored data is
written onto HDD 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 HDDs by striping with distributed parity, and then written onto HDDs by
striping. Owing to this feature, high disk access performance of RAID0 and, in addition, high
reliability of RAID5 can be achieved.
HDD 1 HDD 2
Stripe 1 Stripe 2
Stripe 6
Pality(5,6)
Stripe 9
Pality(9,10)
RAID5
RAID Controller
HDD 2
Stripe 1
Stripe 3
Stripe 5
RAID1
RAID0
RAID Controller
HDD 3
Pality(1,2)
Stripe 5
Stripe 10
Pality(11,12)
RAID0
327
HDD 3 HDD 4
Stripe 2 Stripe 2
Stripe 4
Stripe 4
Stripe 6 Stripe 6
RAID1
HDD 4 HDD 5
Stripe 4
Stripe 3
Stripe 8
Pality(7,8)
Stripe 11
RAID5
Hardware
HDD 6
Pality(3,4)
Stripe 7
Stripe 12