HP MPX200 Multifunction Router - Manual (Page 146)

9 Restrictions
This chapter details the restrictions that apply to DMS related to reconfiguring LUNs on a storage
array, and removing an array after a data migration job completion.
Reconfiguring LUNs on a storage array
Carefully handle reconfiguration of a LUN ID following these guidelines:
•
Do not change the LUN ID for any LUN that is currently configured to a data migration job
or masked to an initiator.
•
Before reassigning a LUN ID to a LUN, ensure that the LUN is not configured. If the LUN is
configured, remove the configuration as follows:
◦ If the LUN is configured to a migration job, remove or acknowledge the job.
◦ If the LUN is masked to an initiator, remove the LUN mask.
•
If a data migration job is completed, acknowledge the job prior to changing the LUN ID. If a
data migration job has stopped on a specific LUN, remove the migration job before reassigning
the LUN ID.
•
After changing the LUN presentation from the array to the MPX200 (where either a different
LUN is presented to the same LUN ID, or the same LUN is presented to a different LUN ID),
click Refresh in HP StorageWorks mpx Manager and verify that the state of the LUN is online.
Also, make sure that the correct LUN, WWULN and path information are shown.
•
Before you reassign a LUN from one VP group to another VP group, you must remove that
LUN from any LUN masking or data migration job configuration. This step is especially
important if a different LUN with the same LUN ID is configured in the original VP group.
For example, both LUN A and LUN B have LUN ID 8 and are configured in VPG1. If LUN A
already has LUN masking or data migration jobs configured, remove all LUN masking and
data migration jobs that include LUN A before reconfiguring LUN A to another VP Group
(VPG2, VPG3, VPG4). If LUN A does not have any LUN masking or data migration jobs
configured, it is not necessary to remove LUN masking or data migration jobs. QLogic
recommends that you rescan storage arrays after reconfiguring VP groups.
•
Specific arrays, such as the IBM DMX or Symmetrix VMAX, require that you set the SPC-2 bit
prior to masking LUNs to the MPX200. Setting the SPC-2 bit ensures proper functioning of the
MPX200, compliant behavior from the array side, and a change to the WWULN that is
presented to the host from the array. Changing the bit setting after performing LUN masking
may cause reconfiguration issues and prevent the MPX200 from showing the LUNs.
To set the SPC-2 bit, first remove the zone that includes the MPX200 and array ports. Then
issue the array rm command to remove the array entity created on the MPX200.
Removing an array after completing data migration jobs
After you complete all data migration jobs, remove the storage array by following the procedure
in this section.
To remove an array after completing data migration jobs:
1.
On the MPX200, remove the configuration from the LUNs associated with the array being
removed:
•
If the LUN is configured to a migration job, remove or acknowledge the job.
•
If the LUN is masked to an initiator, remove the LUN mask.
146 Restrictions