The following are the guidelines to configure host-to-virtual disk mapping:
•
Each virtual disk in the storage array can be mapped to only one host or host group.
•
Host-to-virtual disk mappings are shared between controllers in the storage array.
•
A unique LUN must be used by a host group or host to access a virtual disk.
•
Each host has its own LUN address space. MD Storage Manager permits the same LUN to be used by different hosts or host groups to
access virtual disks in a storage array.
•
All operating system do not have the same number of LUNs available.
•
You can define the mappings on the
Host Mappings
tab in the AMW. See
.
Creating host-to-virtual disk mappings
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.
•
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.
.
To create host to virtual disk mappings:
1
In the AMW, select the
Host Mappings
tab.
2
In the object tree, select:
•
Default Group
•
Undefined mappings node
•
Individual defined mapping
•
Host group
•
Host
3
From the menu bar, select
Host Mappings
>
LUN Mapping
>
Add.
The
Define Additional Mapping
window is displayed.
4
In
Host group or host
, select the appropriate host group or host.
All defined hosts, host groups, and the default group are displayed in the list.
NOTE:
When configuring an iSCSI storage array, if a host or a host group is selected that does not have a SAS host bus
adapter (SAS HBA) host port defined, a warning dialog is displayed.
5
In
Logical unit number
, select a LUN.
The supported LUNs are 0 through 255.
6
Select the virtual disk to be mapped in the
Virtual Disk
area.
The
Virtual Disk
area lists the names and capacity of the virtual disks that are available for mapping based on the selected host group
or selected host.
7
Click
Add
.
NOTE:
The Add button is inactive until a host group or host, LUN, and virtual disk are selected.
8
To define additional mappings, repeat step 4 through step 7.
NOTE:
After a virtual disk has been mapped once, it is no longer available in the Virtual Disk area.
9
Click
Close
.
The mappings are saved. The object tree and the
Defined Mappings
pane in the
Host Mappings
tab are updated to reflect the
mappings.
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Disk groups, standard virtual disks, and thin virtual disks
