User's Manual

252 Virtual Disks
– Select RAID 0 for striping—This selection groups n disks together as
one large virtual disk with a total capacity of n disks. Data is stored to
the disks alternately so that they are evenly distributed. Data
redundancy is not available in this mode. Read and write performance
is enhanced.
– Select
RAID 1 for mirroring disks—This selection groups two disks
together as one virtual disk with a capacity of one single 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 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 parity information — This
selection groups n
disks as one large virtual disk with a capacity of
(n-2) disks. Two sets of parity information is alternately stored on all
disks. The virtual disk remains functional with up to two disk failures.
– 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.
2 Type the size for the reconfigured virtual disk in the Size text box. The
minimum and maximum allowable size is displayed under the
Size text
box. These values reflect the new capacity of the virtual disk after any
addition or deletion of physical disks which you may have chosen in Virtual
Disk Task: Reconfigure (Step 1 of 3).
NOTE: On the CERC SATA1.5/2s controller, you must specify the maximum virtual
disk size.