About virtual storage machines and virtualized resources
The virtual storage machine is the unit that is used to manage virtualized storage system resources. When you use global storage virtualization functions (global-active device, nondisruptive migration), you create a virtual storage machine within a physical storage system to enable the host server to recognize two storage systems as one virtual storage system.
For example, when nondisruptive migration is used to migrate a storage system, a virtual storage machine for the migration source storage system is created in the migration target storage system. For nondisruptive migration, the migration source storage system is the virtualized storage system. When global-active device (GAD) is used to provide nondisruptive host access to volumes that reside on different storage systems, a virtual storage machine for the storage system that contains the primary volumes (P-VOLs) of the GAD pairs is created in the secondary storage system. For GAD, the primary storage system is the virtualized storage system.
The following figure illustrates the relationship between a (physical) storage system and virtual storage machines.
Virtual IDs
For operations involving virtualized resources in a virtual storage machine, physical resources must be linked to virtualized resources. For example, when you perform operations on LDEVs in a virtual storage machine, you must specify physical LDEV IDs (not virtual LDEV IDs) that link to resources in the virtual storage machine. The following table lists the virtual IDs that must be set for resources in the (physical) storage system to enable the host server to recognize two storage systems as one virtual storage system.
|
Virtual ID |
Resource on which the virtual ID is set |
|
Model type of the virtualized storage system Serial number of the virtualized storage system |
Resource group |
|
LDEV ID Emulation type CVS LUSE volume number SSID |
LDEV |
