Biostar NF4 AM2G Setup Manual page 23

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.
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Uses: RAID 1 is ideal for small databases or any other application that
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requires f ault tolerance and minimal capacity.
Benefits: Prov ides 100% data redundancy. Should one driv e f ail, the
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controller switches to the other drive.
Drawbacks: Requires 2 driv es for the storage space of one driv e.
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Perf ormance is impaired during driv e rebuilds.
Fault Tolerance: Yes.
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