EverFocus NVR User Manual page 153

improved by spreading the I/O
load across many channels and
drives
No parity calculation overhead is

involved
RAID 1

Advantage
Simplest RAID storage subsystem

design
Can increase read performance by

processing data requests in
parallel since the same data
resides on two different drives
RAID 5

Advantage
High Read data transaction rate

Medium Write data transaction

rate
Good aggregate transfer rate

Most versatile RAID level

RAID 10

Advantage
Implemented as a mirrored RAID

Volume whose segments are RAID

0 RAID Volumes
High I/O rates are achieved

thanks to multiple stripe
segments
being lost
Should not be used in mission

critical environments
Disadvantage
Very high disk overhead - uses

only 50% of total capacity
Disadvantage
Disk failure has a medium impact

on throughput
Disadvantage
Very high disk overhead – uses

only 50% of total capacity
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