Configuration Strategies - Gateway ADAC Ultra2 S466 Hardware Manual

Configuration Strategies

Maximize Capacity RAID 0 achieves maximum drive capacity, but does
RAID Description
Level
0 Striping
without parity
1 Mirroring
3 Striping with
fixed parity
drive
5 Striping with
floating parity
drive
10 Mirroring and
Striping
30 RAID 3 and
Striping
50 RAID 5 and
Striping
46 ADAC Ultra2 S466 Hardware Guide
The most important factors in RAID array configuration
are: drive capacity, drive availability (fault tolerance), and
drive performance. You cannot configure a logical drive
that optimizes all three factors, but it is easy to choose a
logical drive configuration that maximizes one factor at the
expense of the other two factors, although needs are
seldom that simple.
not provide data redundancy. Maximum drive capacity for
each RAID level is shown below. OEM level firmware that
can span up to 4 logical drives is assumed.
Drives
Required
1 – 32
2
3 – 8
3 – 8
4 – 8 (Must
be a multiple
of 2)
6 – 32 (Must
be a multiple
of arrays)
6 – 32 (Must
be a multiple
of arrays)
Capacity
(Number of disks) X capacity of
smallest disk
(Capacity of smallest disk) X (1)
(Number of disks) X (capacity of
smallest disk) - (capacity of 1 disk)
(Number of disks) X (capacity of
smallest disk) - (capacity of 1 disk)
(Number of disks) X (capacity of
smallest disk) / (2)
(Number of disks) X (capacity of
smallest disk) – (capacity of 1 disk X
number of Arrays)
(Number of disks) X (capacity of
smallest disk) – (capacity of 1 disk X
number of Arrays)
Cont'd