MDM uses Device Manager to manage data storage units. Storage units are data storage containers, such as volumes and logical unit numbers (LUNs). Storage devices assign the LUNs to the storage units. The LUN provides a unique address or identifier for the logical volume.
Device Manager provides interconnections between managed objects and storage units. For example, Device Manager provides the association between a virtual LUN and a managed LUN in a SAN Volume Controller. By examining the storage units being used by each device and matching worldwide node names, Device Manager creates associations between the managed objects that represent the storage device and the storage unit.
![]() | Note:
When reporting storage capacity, MDM follows the IEEE standard definitions in which:
The FAStT Storage Manager and SAN Volume Controller Administrative Console both report capacities using these equivalencies:
Thus, if the SAN Volume Controller Administrative Console reports the capacity of a virtual disk as "1 GB", MDM will report it as "1.0737 GB". In both cases the capacity of the virtual disk is 1,073,741,824 bytes: it is the size of the unit "gigabyte" that is being treated differently. |