Overview of volume manager, Volume manager function, Overview of volume manager and custom – HP StorageWorks XP Remote Web Console Software User Manual
Page 157: Volume size
7 Overview of Volume Manager and
Custom Volume Size
Volume Manager and Custom Volume Size (CVS) are functions for open systems and mainframe
systems. To use these functions, you need the software called HP StorageWorks LUN Configuration
and Security Manager XP.
This chapter describes Volume Manager and CVS.
Overview of Volume Manager
This section describes the Volume Manager function and configuration of LUSE volumes (expanded
LUs). Volume Manager operations include the following:
• Viewing concatenated parity groups
• Creating LUSE volumes
• Releasing LUSE volumes
• Changing LUSE capacities
Volume Manager function
The Volume Manager function is applied to open-system logical volumes and enables you to configure
one large logical volume by combining several small LDEVs. The Volume Manager function allows
hosts that can only use a limited number of logical units (LUs) per fibre interface to access larger
amounts of data using expanded LUs.
shows the LUSE configuration. By using the Volume Manager function, you can combine
several logical devices (LDEVs) or volumes into one large logical volume. The configured LDEV's size
can be expanded up to 36 times the size of the original LDEV. The ID of the logical volume defined
as the large logical volume is represented by the smallest LDEV ID (assigned to the top LDEV). The
host recognizes the expanded logical volume as one representative LDEV. As long as the number of
LDEVs combined into one large logical volume does not exceed the specified limit (see
), you can arbitrarily select any LDEVs as the volumes to combine, regardless of
their size (or capacity) or whether or not they are on the same Control Unit (CU). The Volume Manager
function also allows you to combine several LDEVs and a LUSE volume (combined LDEVs) into one
LUSE volume, or combine LUSE volumes together into one LUSE volume.
Before the host can access each LDEV composing an expanded LU (LUSE volume), you must release
the expanded LU.
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