Installation guide

Software Operation Manual
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RAID is an acronym for Redundant Array of Independent Disks. It is an array of
multiple independent hard disk drives that provide high performance and fault
tolerance. The RAID subsystem controller implements several levels of the
Berkeley RAID technology. An appropriate RAID level is selected when the
volume sets are defined or created. This decision is based on disk capacity,
data availability (fault tolerance or redundancy), and disk performance. The
following are the RAID levels which are supported in the RAID subsystem.
The RAID subsystem controller makes the RAID implementation and the disks’
physical configuration transparent to the host operating system. This means
that the host operating system drivers and software utilities are not affected,
regardless of the RAID level selected. Correct installation of the disk array and
the controller requires a proper understanding of RAID technology and the
concepts.
1.2.1 RAID 0
RAID 0, also referred to as striping, writes stripping of data across multiple disk
drives instead of just one disk drive. RAID 0 does not provide any data
redundancy, but does offer the best high-speed data throughput. RAID 0 breaks
up data into smaller blocks and then writes a block to each drive in the array.
Disk striping enhances performance because multiple drives are accessed
simultaneously; the reliability of RAID level 0 is less because the entire array will
fail if any one disk drive fails.