Chapter 1 Hardware Installation
UNS Series Hardware Installation Guide
17
Refer to the table below to choose a RAID.
Use
Configuration > Setup Wizard
to set up your UNS for the first time with a single RAID.
Alternatively, use
Configuration > Storage Configuration > Pool > Create
to configure RAID.
See the User’s Guide or Web Help for configuration details.
Table 7
RAID Description
TYPE
DESCRIPTION
RAID 0
Disk striping.
RAID 1
Disk mirroring over two disks.
RAID 5
Striping with interspersed parity over the member disks.
RAID 6
2-dimensional parity protection over the member disks.
RAID 50
Striping over the member RAID 5 volumes.
RAID 60
Striping over the member RAID 6 volumes.
Table 8
RAID Comparison
GOAL
RAID
SCHEME
SAFETY
MIN. NO. OF
HARD DISKS
USAGE
CAPACITY
PERFORMANCE
Efficiency and cost
RAID 0
None
2
All
Best
Data Security
RAID 1
Best
2
50%
Best Read
Data Security with
cost constraints
RAID 5
Good
3
N-1 (N = no.
used)
Fast read, slower
write
Data security for
enterprises
RAID 6
Very good
4
N-2
Fast read, slower
write
Backups with high
performance and no
cost constraints
RAID 10
Best
4
50%
Best Read
Data Security with
cost constraints
RAID 50
Good
6
N-2
Fast read, slower
write
Data security for
enterprises
RAID 60
Very good
8
N-4
Fast read, slower
write
