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RAID 1 - Disk Mirroring/Disk Duplexing
All data is stored twice on two identical hard disks. When one hard disk fails, all data is
immediately available on the other without any impact on performance and data integrity.
With Disk Mirroring (Figure 2) two hard disks are mirrored on one I/O channel. If each hard disk
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.
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Figure 2. RAID 1 - Disk Mirroring
Figure 3. RAID 1 – Disk Duplexing
Intel RAID Controller SRCMR User's Guide
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