RAID level-5:
RAID level-5 requires a minimum of three
hard disk drives. This RAID level stripes data and parity
across all drives in the array. When an array is assigned
RAID level-5, the capacity of the logical drive is reduced by
one drive (for data-parity storage).
RAID level-5 is generally the most desirable choice,
because it offers both data protection and increased
throughput. RAID level-5 gives higher capacity than RAID
level-1, but RAID level-1 offers better performance.
The following illustration shows data arranged in an array
with three hard disk drives. The logical drive is assigned
RAID level-5. Notice that the storage of the data parity
also is striped, and it shifts from drive to drive.
.
.
.
.
.
.
Data Stripe 1
Block 1
Block 2
Block 3
Mirror Stripe
1
Block 3
Block 1
Block 2
Data Stripe 2
Block 4
Block 5
Block 6
Mirror Stripe
2
Block 6
Block 4
Block 5
.
.
.
.
.
.
Stripe 1
Block 1
Block 2
Parity 1+2
Stripe 2
Block 3
Parity 3+4
Block 4
Stripe 3
Parity 5+6
Block 5
Block 6
Stripe 4
Block 7
Block 8
Parity 7+8
ServeRAID Configuration Program
The graphical interface in the ServeRAID Configuration
Program makes it easy to create, delete, change, or view
the ServeRAID configuration. Before beginning, review the
following illustration to become familiar with the layout of
the configuration program screens.
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Netfinity Server HMM
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