3Ware 7000-2 User Guide - Page 21

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 exceptional performance, particularly for data intensive applications such as video editing, computer aided design and geographical information 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 algorithms (see Figure 2). This gives your system fault tolerance by preserving 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. www.3ware.com 21