Configuration: Disk Groups and Virtual Disks 137NOTE: You can include a secondary virtual disk in a storage partition.However, any hosts that are mapped to the secondary virtual disk has read-onlyaccess until the virtual disk is promoted to a primary virtual disk, or the mirrorrelationship is removed.Storage partitioning topology is the collection of elements, such as DefaultGroup, host groups, hosts, and host ports shown as nodes in the Topologypane of the Mappings tab in the AMW. For more information, see "Using theMappings Tab" on page 94.If a storage partitioning topology is not defined, an informational dialogappears each time you select the Mappings tab. You must define the storagepartitioning topology before you define the actual storage partition.Disk Group and Virtual Disk ExpansionAdding free capacity to a disk group is achieved by adding unconfiguredcapacity on the array to the disk group. Data is accessible on disk groups,virtual disks, and physical disks throughout the entire modification operation.The additional free capacity can then be used to perform a virtual diskexpansion on a standard or snapshot repository virtual disk.Disk Group ExpansionTo add free capacity to a disk group:1 In the AMW, select the Logical tab.2 Select a disk group.3 Select Disk Group Add Free Capacity (Physical Disks).The Add Free Capacity window is displayed. Based on the RAID level, andthe enclosure loss protection of the current disk group, a list of unassignedphysical disks appears.NOTE: If the RAID level of the disk group is RAID Level 5, or RAID Level 6, andthe expansion enclosure has enclosure loss protection, Display only physical disksthat will ensure enclosure loss protection appears and is selected by default.4 in the Available physical disks area, select physical disks up to the allowedmaximum number of physical disks.NOTE: You cannot mix different media types or different interface typeswithin a single disk group or virtual disk.
