Users Guide

• 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. The system must have at

least two physical 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. The system must have at least three physical 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 are 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. The system must have at least four physical disks to use RAID 10.

NOTE:

– RAID 10 virtual disk reconguration is applicable only for PERC 9 family of hardware controllers with the latest

rmware version.

– Other RAID level virtual disks cannot be converted to RAID 10 virtual disks.

– RAID 10 virtual disks cannot be converted to any other RAID level virtual disks.

– RAID 10 virtual disk reconguration is supported only for even number of physical disks.

– RAID 10 virtual disk reconguration is allowed for a maximum of 32 disks.

– RAID 10 virtual disk reconguration operation is applicable only for single span with 32 disks.

– RAID 10 virtual disk reconguration operation is not supported with Intelligent Mirroring.

NOTE: For RAID 10 partial virtual disks, there are only two methods to increase the disk size or capacity:

– Expanding the capacity by increasing the percentage value.

– Adding disks into the original RAID 10 virtual disk.

NOTE: If you create RAID10 with uneven spans in PERC9 controller and then tries to import the RAID10 VD from

PERC9 to PERC10, the import fails.

2. In the Size eld, type the size of the recongured virtual disk. The minimum and maximum allowable size is displayed below the

Size eld. These values reect the new capacity of the virtual disk after any addition or deletion of physical disks which you may

have chosen in Virtual Disk Task: Recongure (Step 1 of 3).

3. Click Continue to go to the next page or Exit Wizard if you want to cancel.