Mapping luns to hosts – HP MPX200 Multifunction Router User Manual
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4.
On the LUN Selection window, select one or more LUNs for the selected virtual port group
node, and then click Next, or use the LUN remapping feature to remap a LUN to a different
ID.
On the Suggestion window, the router automatically detects the portals through which the
array target ports are accessible. HP recommends that you present a single source, array
target port, and VPG only once across both blades.
shows that when
source arrays ports SA1, SA2, SA3, and SA4 are discovered on VPG1, only one corresponding
presented target is created on PT-SA1, PT-SA2, PT-SA3, and PT-SA4. Although portal selection
is not mandatory for LUN presentation, this window suggests that you map targets on the
respective FC portals to make the LUNs available to the host.
NOTE:
The Suggestion window appears only when there is no existing mapping. This
window does not appear if a target map already exists as part of a previous LUN presentation
through this array.
5.
On the Confirm Changes window, review the LUN mapping, and then click Next.
The LUN Masking Configuration Status opens, and the Security Check dialog box prompts
you to enter the administrative password.
6.
Type the admin password, and then click OK.
7.
On the LUN Masking Configuration Status window, review the results of the target ports
presented for the selected initiators, and then click Finish.
Mapping LUNs to hosts
The Host LUN Presentation Wizard allows mapping LUNs from the source storage array to all the
initiator ports configured as a single host, eliminating the requirement for selecting multiple initiators
with Initiator LUN mapping. Unlike Initiator LUN mapping, Host LUN mapping is done for both
the blades in a single operation.
This mapping provides access for the LUN to the host from the router through a presented virtual
target. Mapping is required as a part of the online migration process of inserting the router in the
host I/O path. You must ensure that the entire host I/O is routed by the router, and that there is
no direct access to any source controller ports from the host during migration.
NOTE:
LUN mapping is required only for online data migration for FC and iSCSI initiators. LUN
mapping is not required for offline data migration.
For HP-UX initiators, set the host type to HP-UX in the MPX200. For all other initiators, leave the
host type set to Windows, the default.
For arrays that have a dedicated controller LUN (for example, LUN-0 on HP EVA arrays), ensure
that LUN-0 is also presented to the FC initiators hosts with the actual data LUNs.
To map a source LUN to a Host:
1.
On the Wizards menu, select Host LUN Presentation Wizard.
2.
If prompted to select a blade, click Blade 1 on which to perform the mapping as Host. However,
Host LUN presentation is a chassis level feature, so it is going to create LUN mapping on both
blades.
3.
On the LUN Presentation Type window, select LUN Remap and then click Next.
NOTE:
HP recommends that you use the LUN Remap option during LUN Presentation. This
makes it mandatory for the user to choose the Global option when creating PresentedTarget
Maps. The Global Target map eliminates the need to create a presented target for each
VPgroup and reduces the number of maps required.
4.
On the Select the Host for LUN Presentation window, select the host that needs to be assigned
LUNs, and then click Next.
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Performing data migration