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2.
Guide to RAID Configurations
2.1 Introduction of RAID
RAID
The term "RAID" stands for "Redundant Array of Independent
Disks", which is a method combining two or more hard disk drives
into one logical unit. For optimal performance, please install
identical drives of the same model and capacity when creating a
RAID set.
RAID 0 (Data Striping)
RAID 0 is called data striping that optimizes two identical hard disk
drives to read and write data in parallel, interleaved stacks. It will
improve data access and storage since it will double the data
transfer rate of a single disk alone while the two hard disks
perform the same work as a single drive but at a sustained data
transfer rate.
WARNING!!
Although RAID 0 function can improve the access performance, it
does not provide any fault tolerance. Hot-Plug any HDDs of the
RAID 0 Disk will cause data damage or data loss.
RAID 1 (Data Mirroring)
RAID 1 is called data mirroring that copies and maintains an
identical image of data from one drive to a second drive. It
provides data protection and increases fault tolerance to the
entire system since the disk array management software will
direct all applications to the surviving drive as it contains a
complete copy of the data in the other drive if one drive fails.
RAID 0+1
RAID 0+1 is data striping and data mirroring combined without
parity (redundancy data) having to be calculated and written.
With the RAID 0+1 configuration you get all the benefits of both
RAID 0 and RAID 1 configurations. Use four new hard disk drives
or use an existing drive and three new drives for this setup.
3
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