In Virtual Storage Conductor, the unit that divides one RAID group into arbitrary capacities is called a "physical disk". When the system does not use Virtual Storage Conductor, the physical disk becomes the corresponding logical unit (LUN) recognized by the transaction server.
Administrators can freely set the physical disk capacity when using Virtual Storage Conductor. However, we recommend that you determine the physical disk capacity according to the following guidelines:
For a relatively large-capacity volume (virtual disk)
When the transaction server uses relatively large-capacity volumes (virtual disks), be sure to increase the physical disk capacity (such as using one physical disk as one RAID group) as well.
Although it is possible to create a large-capacity virtual disk by combining multiple physical disks, increased physical disk capacity reduces the number of physical disks and enables easier management.
For a relatively small-capacity volume (virtual disk)
When the transaction server uses many small-capacity volumes (virtual disks), be sure to decrease the physical disk capacity as well.
Although it is possible to create a small-capacity virtual disk from part of one physical disk, decreased physical disk capacity results in simpler correspondence between the virtual disk and physical disk, and enables easier management.
