HighPoint NA762TB - Manual (Page 40)

HighPoint Technologies Inc. 40
rebuilding process complete. The status is in “Disabled”.
Array disk member diagram is like this:
APPENDIX C - RAID Technology Explanation
Type Description Mini.
disks Usable
space Advantage Disadvantage Application
JBOD Just a
bunch of
disk 1 100% Each drive can be
accessed as a single
volume No fault tolerance -
failure of one drive
results in complete
data loss
Backup
RAID 1 Disk
Mirroring
2 50% It provides
convenient low-cost
data redundancy for
smaller systems and
servers
Useable storage
space is 50% of
total available
capacity
Operating system,
backup, and
transaction
database.
RAID 0 Disk
Striping 2 100% Offers the highest
performance No fault tolerance –
failure of one drive
in the array results
in complete data
lose
Temporary file,
performance driven
application.
RAID 10 Disk
Mirroring
followed by
stripe
4 50% High read
performance and
medium write
performance with
data protection for
up to 2-drive failures
Useable storage
capacity equals
total capacity of all
drives in the array
minus two
Fast database and
application servers
which need
performance and
data protection
RAID 5 Disk
Striping
with
Rotating
parity
3 67-94% High read
performance, and
medium write
performance with
data protection with
a single drive failure
Not recommended
for database
applications that
require
frequent/heavy
write sessions.
Data archives, and
ideal for application
that require data
protection
RAID 50 RAID5 set
followed by
stripe
6 67-94% High read
performance, and
medium write
performance with
data protection with
a single drive failure
Cost is high
because minimum
disks requirement
is 6
Large database, file
server, application
servers
RAID 6 Disk
Striping
with dual
rotating
parity
4 50-88% High read
performance, and
medium write
performance with
data protection in
case of up to two
drives failure
Not recommended
for applications that
require
frequent/heavy
write sessions.
Data archives and
ideal for application
that requires data
protection