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G-SPEED Product Guide
Pa
g
e 17
APPENDIX A
RAID
Level Description Advantage Disadvantage Ideal For…
0 Disk striping Offers the highest
performance and
useable storage
capacity
No fault tolerance -
failure of one drive
in the array results
in complete data
loss
Content creation
applications
1 Mirroring High level of fault
tolerance
Not the most
efficient in regards
to capacity as
useable storage
space is cut in half
Applications in
which data
security is
paramount
3 Disk striping
with
dedicated
parity drive
High level of
read/write
performance, fault-
tolerant, disk
failure has
insignificant impact
on performance
Content creation
applications
requiring high-
performance and
data security
5 Disk striping
with
distributed
parity
High read
performance,
medium write
performance, fault-
tolerant
Disk failure results
in drop in
performance
File servers,
database
applications
6 Disk striping
with dual-
distributed
parity
An extension of
RAID 5 with a
second
independent
distributed parity
scheme. High level
of fault tolerance.
Two drives in the
array can fail
without data loss.
Lower performance
than RAID 3 or
RAID 5
Mission critical
data
JBOD Just-a-
bunch-of-
disks
Each drive can be
accessed as an
individual volume.
No fault tolerance Audio
applications