G-SPEED eS PRO INSTALLATION GUIDE
GUIDE
GUIDE Guide
Page 23
APPENDIX B: RAID levels explained
RAID
Level
Description
Advantage
Disadvantage
Ideal For…
0
Disk striping
Offers the highest
performance and a
useable storage
capacity of 100% of
total available storage
capacity
No fault tolerance -
failure of one drive in
the array results in
complete data loss
Content creation
applications
requiring highest
storage capacity
1
Mirroring
Maximum level of
data protection as
identical data is
written to multiple
drives
Useable storage
space is 50% of total
available capacity
Applications in
which data security
is paramount
5
Disk striping
with
distributed
parity
High read
performance, medium
write performance
with data protection in
case of a drive failure.
Useable storage
capacity equals total
capacity of all drives
in the array less the
capacity of one drive.
For example, a 4x
1TB RAID 5 yields a
useable capacity of 3
TB.
Disk failure results in
drop in performance
Content creation
applications
requiring data
protection
6
Disk striping
with dual
distributed
parity
High read
performance, medium
write performance
with data protection in
case of up to two
drive failures.
Useable storage
capacity equals total
capacity of all drives
in the array less the
capacity of two drives.
For example, a 4x
1TB RAID 5 yields a
useable capacity of 3
TB.
Disk failure results in
drop in performance
Content creation
applications
requiring data
protection
JBOD
Just-a-bunch-
of-disks
Each drive can be
accessed as an
individual volume.
Useable storage
capacity is 100% of
total available
storage.
No fault tolerance
Audio applications
APPENDIX C: Notes
When the G-Tech web GUI is open dropped frames may
occur in editing applications such as Final Cut PRO. We
recommend not having the GUI open while working in these
programs.
Two G-SPEED eS PRO storage units can be attached to the
G-Tech RAID controller for up to 8TB of capacity and over
600 MB/sec of performance.
Replacements / extra G-SPEED eS PRO disk modules are
available for purchase online at:
www.g-technology.com/products/g-speed-es.cfm
