Users Guide

Use Case Scenarios 87
2 Get the FQDDs and values of the physical disks attached to the required
controller.
3 Run the CreateVirtualDisk() method after setting the correct values
shown in
Ta b l e 5-3:
Table 5-3. Values for the RAID Set Up
Parameter Value
FQDD Of the controller and the attached physical disks
RAID Level Set RAID level as 5.
RAID 5 stripes data across the physical disks, and uses parity
information to maintain redundant data. If a physical disk fails, the
data is rebuilt using the parity information. RAID 5 offers good read
performance and slower write performance with good data redundancy.
Span Depth Set the value as 1. You must have a minimum of 1 span for RAID level
5.
Span Length Set the value as 3.
The span length value refers to the number of physical disks included
in each span. This is calculated by dividing the number of physical
disks by the span depth value.
Size Set 10240 MB for each virtual disk.
Starting LBA Calculate the starting LBA based on existing virtual disks. To calculate
next StartingLBA in 512 byte blocks, use the following formulas:
• RAID0 — Previous StartingLBA + ((Size / # of Drives) / 512)
• RAID1 — Previous StartingLBA + (Size / 512)
• RAID5 — Previous StartingLBA + ((Size / (# of Drives - 1)) / 512)
• RAID6 — Previous StartingLBA + ((Size / (# of Drives - 2)) / 512)
• RAID10 — Previous StartingLBA + ((Size / 2) / 512)
• RAID50 — Previous StartingLBA + ((Size / (# of Drives per span - 1))
/ 512)
• RAID60 — Previous StartingLBA + ((Size / (# of Drives per span - 2))
/ 512)