Biostar TFORCE4 SLI TForce4 SLI user's manual - Page 19

Biostar T-Series RAID 1: Every read and write is actually carried out in parallel across 2 disk drives in a RAID 1 array system. The mirrored (backup) copy of the data can reside on the same disk or on a second redundant drive in the array. RAID 1 provides a hot-standby copy of data if the active volume or drive is corrupted or becomes unavailable because of a hardware failure. RAID techniques can be applied for high-availability solutions, or as a form of automatic backup that eliminates tedious manual backups to more expensive and less reliable media. Features and Benefits ­ Drives: Minimum 2, and maximum is 2. ­ Uses: RAID 1 is ideal for small databases or any other application that requires fault tolerance and minimal capacity. ­ Benefits: Provides 100% data redundancy. Should one drive fail, the controller switches to the other drive. ­ Drawbacks: Requires 2 drives for the storage space of one drive. Performance is impaired during drive rebuilds. ­ Fault Tolerance: Yes. TForce4 SLI RAID 0+1: RAID 0 drives can be mirrored using RAID 1 techniques. Resulting in a RAID 0+1 solution for improved performance plus resiliency. Features and Benefits - Drives: Minimum 4, and maximum is 6 or 8, depending on the platform. - Benefits: Optimizes for both fault tolerance and performance, allowing for automatic redundancy. May be simultaneously used with other RAID levels in an array, and allows for spare disks. - Drawbacks: Requires twice the available disk space for data redundancy, the same as RAID level 1. - Fault Tolerance: Yes. Block 1 Block 2 Block 3 Block 1 Block 2 Block 3 Block 1 Block 3 Block 5 Block 2 Block 4 Block 6 Block 1 Block 3 Block 5 Block 2 Block 4 Block 6 16 User's Manual