Performing Parallel Access Volumes Operations; Assigning Alias Volumes To Base Volumes - HPE XP7 User Manual

Performing Parallel Access Volumes
operations

Assigning alias volumes to base volumes

You can assign aliases to base volumes in XP7 Storage. You can assign up to 255 aliases to a base
device in a single CU.
Aliases are assigned in the storage system by selecting LDEV addresses that do not have any
provisioning (for example, emulated devices such as a 3390-x) assigned to them. These addresses are
called free volumes. The list of free volumes is the list of addresses in the CU that can be used as aliases
to assign to base volumes. It is important to note that any address that does not have a provisioned
device assigned will be on the free volumes list. You must make sure that the free volumes assigned as
aliases in Remote Web Console are the corresponding device addresses that are defined as aliases in
the IO configuration.
If the number of free volumes you select to assign to the selected base volumes is larger than the number
of base volumes you have selected, the PAV function attempts to allocate the free volumes equally to the
base volumes. For example, if you select six free volumes and two base volumes, three free volumes
(aliases) are allocated to each base volume.
If you are using HPAV to issue I/O requests only to a CU, complete the following:
1. Decide the number of aliases that are necessary for the CU.
2. Assign the aliases to arbitrary base volumes.
Assigned aliases function as aliases for all base volumes in a CU when using HPAV.
CAUTION: Assigning alias volumes simultaneously in more than one CU can degrade host
performance.
Prerequisites
• The PAV and HPAV (if applicable) license keys must be installed in the storage system using Remote
Web Console.
• You must have the Storage Administrator (Provisioning) role to perform this task.
• You must enable the Remote Web Console secondary window. For more information, see the chapter
about how to use the Remote Web Console secondary window in the HPE XP7 Remote Web Console
User Guide.
• Base devices are defined in the storage system.
Procedure
1. In the Remote Web Console main window, select Actions > Mainframe Connection > Parallel
Access Volumes.
If you select Actions and do not see a Mainframe Connection item listed on the drop-down menu,
the Remote Web Console secondary window function probably is not enabled.
2. Click to change to Modify mode.
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Performing Parallel Access Volumes operations