User's Manual

Virtual Disks 223
If you select No , the RAID levels are available based on the total number
of physical disks present on the system.
5 Select the required RAID level from the from the drop-down list.
– Depending on the controller,
Concatenated enables you to combine
the storage capacity of several disks or to create a virtual disk using a
single physical disk. For more information on the number of
supported physical disks supported by
Concatenated , see Number of
Physical Disks per Virtual Disk. Using
Concatenated does not provide
data redundancy or affects the read/write performance.
– Select
RAID 0 for striping. This selection groups n disks together as a
large virtual disk with a total capacity of
n disks. Data is alternately
stored in the disks so that they are evenly distributed. Data
redundancy is not available in this mode. Read/write performance is
enhanced.
– Select
RAID 1 for mirroring disks. This selection groups two disks as
one virtual disk with a capacity of one disk. The data is replicated on
both disks. When a disk fails, the virtual disk continues to function.
This feature provides data redundancy and good read performance,
but slightly slower write performance. Your system must have at least
two disks to use RAID 1.
– Select
RAID 5 for striping with distributed parity. This selection
groups
n disks together as one large virtual disk with a capacity of ( n-1 )
disks. When a disk fails, the virtual disk continues to function. This
feature provides better data redundancy and read performance, but
slower write performance. Your system must have at least three disks
to use RAID 5.
– Select
RAID 6 for striping with additional distributed parity. This
selection groups
n disks as one large virtual disk with a capacity of ( n-
2
) disks. The virtual disk remains functional up to two disk failures.
RAID 6 provides better read performance, but slower write
performance. Your system must have at least four disks to use RAID 6.
– Select
RAID 10 for striping over mirror sets. This selection groups n
disks together as one large virtual disk with a capacity of (
n/2 ) disks.
Data is striped across the replicated mirrored pair disks. When a disk
fails, the virtual disk continues to function. The data is read from the
surviving mirrored pair disk. This feature provides the best failure