Raid 0 Arrays Maximize Performance And Capacity; Raid 1 Arrays Offer Fault Tolerance; Figure 1. Raid 0 Configuration Example - 3Ware 7000-2 - Escalade RAID Controller User Manual

Introduction
Raid 0 arrays maximize performance and
capacity
When drives are configured in a striped disk array (see Figure 1),
the Escalade ATA RAID Controller distributes large files across the
multiple disks using RAID 0 techniques. Striped disk arrays
achieve high transfer rates because they can read or write data on
more than one drive simultaneously. Striped disk arrays give excep-
tional performance, particularly for data intensive applications such
as video editing, computer aided design and geographical informa-
tion systems. Striping your disk array concatenates each drive's
capacity into one large volume. The stripe size is user configurable
at 64K, 128K, 256K, 512K or 1M.

Figure 1. RAID 0 Configuration Example

Raid 1 arrays offer fault tolerance

Mirrored disk arrays write data to two drives using RAID 1 algo-
rithms (see Figure 2). This gives your system fault tolerance by pre-
serving the data on one drive if the other drive fails. Fault tolerance
is a basic requirement for mission critical systems like web and
database servers.
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