Appendix C - Raid Technology Explanation - HighPoint RocketStor 6328 User Manual

APPENDIX C - RAID Technology Explanation

Description
Type
Just a bunch
JBOD
of disk
Disk
RAID 1
Mirroring
Disk Striping
RAID 0
RAID 10 Disk
Mirroring
followed by
stripe
RAID 5 Disk Striping
with
Rotating
parity
RAID5 set
RAID 50
followed by
stripe
Disk Striping
RAID 6
with dual
rotating
parity
Mini. Usable Advantage
disks space
1 100% Each drive can be
accessed as a single
volume
2 50% It provides convenient
low-cost data
redundancy for
smaller systems and
servers
2 100% Offers the highest
performance
4 50% High read
performance and
medium write
performance with
data protection for up
to 2-drive failures
3 67-94% High read
performance, and
medium write
performance with
data protection with a
single drive failure
6 67-94% High read
performance, and
medium write
performance with
data protection with a
single drive failure
4 50-88% High read
performance, and
medium write
performance with
data protection in
case of up to two
drives failure
Disadvantage Application
No fault tolerance - Backup
failure of one drive
results in complete
data loss
Useable storage Operating system,
space is 50% of total backup, and
available capacity transaction database.
No fault tolerance – Temporary file,
failure of one drive in performance driven
the array results in application.
complete data lose
Useable storage Fast database and
capacity equals total application servers
capacity of all drives which need
in the array minus performance and
two data protection
Not recommended Data archives, and
for database ideal for application
applications that that require data
require protection
frequent/heavy write
sessions.
Cost is high because Large database, file
minimum disks server, application
requirement is 6 servers
Not recommended Data archives and
for applications that ideal for application
require that requires data
frequent/heavy write protection
sessions.
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