User's Manual

238 Virtual Disks
– Select RAID 5 for striping with distributed parity. This selection
groups n disks together as one large virtual disk with a total 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 with 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 total 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
protection, read and write performance. Your system must have at
least four disks to use RAID 10.
– Select
RAID 50 to implement striping across more than one span of
physical disk s. RAID 50 groups n*s disks as one large virtual disk with
a capacity of s*(n-1) disks, where s is the number of spans and n is the
number of disks within each span.
– Select
RAID 60 to implement striping across more than one RAID 6
span. RAID 60 Groups n*s disks as one large virtual disk with a
capacity of s*(n-2) disks, where s is the number of spans and n is the
number of disks within each span. RAID 60 provides increased data
protection and better read performance, but slower write
performance.
2 Type a name for the virtual disk in the Name text box.
The virtual disk name can contain only alphanumeric characters as well as
spaces, dashes and underscores. The maximum name length depends on
the controller. In most cases, the maximum length is 15 characters. The
name cannot start with a space or end with a space.
It is recommended that you specify a unique name for each virtual disk. If
you have virtual disks with the same name, it is hard to differentiate the
alerts generated for these virtual disks.