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152 DS6000 Series: Concepts and Architecture
9.1 Configuration hierarchy, terminology, and concepts
The DS Storage Manager provides a powerful, flexible, and easy to use application for the
logical configuration of the DS6000. It is the client’s responsibility to configure the storage
server to fit their specific needs. It is not in the scope of this redbook to show detailed steps
and scenarios for every possible setup. For further assistance, help and guidance can be
obtained from an IBM FTSS or an IBM Business Partner.
9.1.1 Storage configuration terminology
An understanding of the following concepts and terminology can help you to use and
configure the DS Storage Manager configurator.
Storage complex
A storage complex consists of one or more physical storage units that can be managed from
a central management point. DS6000 units can be placed together to form a complex.
Multiple DS6000s can be supported by a single Management Console.
Storage unit
A storage unit, also known as a storage facility, is a single physical storage subsystem
(DS6000).
Host attachment
A host attachment is one or more host ports that are grouped together. Volumes can be
assigned to volume groups, and volume groups can then be assigned to host attachments, for
presentation to the host operating systems.
Traditionally we think of hosts with one or more Fibre Channel adapters (HBAs), with each
adapter having one or more Fibre Channel ports. Each port has a unique Fibre Channel
address called World Wide Port Name (WWPN). The WWPN is the address to which we
assign volumes. A host attachment is a grouping of ports and their World Wide Port Names.
Definitions are made about hosts and attachments in the GUI. The concepts and limitations
are explained in the following list:
Multiple Fibre Channel ports’ WWPNs on the same host system can be specified in one or
more host attachments, in one host definition called
host system in the GUI. A host
attachment does not always mean a single port. For example, refer to Figure 9-1 on
page 153.