DELL MD3220 사용자 설명서

Configuration: Disk Groups and Virtual Disks

• Each host has its own LUN address space. MDSM permits the same LUN 

to be used by different hosts or host groups to access virtual disks in a 

storage array.

• Not every operating system has the same number of LUNs available. 
• You can define the mappings on the Mappings tab in the Array 

Management Window. See "Using the Mappings Tab" on page 84.

Guidelines to define the mappings:

• An access virtual disk mapping is not required for an out-of-band storage 

array. If your storage array is managed using an out-of-band connection, 

and an access virtual disk mapping is assigned to the Default Group, an 

access virtual disk mapping is assigned to every host created from the 

Default Group. To prevent this action from occurring, remove the access 

virtual disk mapping from the Default Group.

• Most hosts have 256 LUNs mapped per storage partition. The LUN 

numbering is from 0 through 255. If your operating system restricts LUNs 

to 127, and you try to map a virtual disk to a LUN that is greater than or 

equal to 127, the host cannot access it.

• An initial mapping of the host group or host must be created using the 

Storage Partitioning Wizard before defining additional mappings. See 

To create host to virtual disk mappings:

1 In the AMW, select the Mappings tab.
2 In the Topology pane, select:

3 In the toolbar, select Mappings Define Additional Mapping.

The 

Define Additional Mapping window is displayed.

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