Intel SRCU32 - RAID Controller, User Manual

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14 Intel RAID Controller SRCU32 User’s Guide
RAID 1 - Disk Mirroring/Disk Duplexing
All data is stored twice on two identical hard drives. When one hard drive fails, all data is
immediately available on the other without any impact on performance and data integrity.
With Disk Mirroring (Figure 2) two hard drives are mirrored on one I/O channel. If each hard drive
is connected to a separate I/O channel, it is called Disk Duplexing (Figure 3).
RAID 1 represents an easy and highly efficient solution for data security and system availability. It
is especially suitable for installations that are not too large (the available capacity is only half of the
installed capacity). RAID 1 requires a minimum of two disks.
Figure 2. RAID 1 – Disk Mirroring
Figure 3. RAID 1 – Disk Duplexing