Host systems — Main page

Use this page to work with user-defined host systems that can access the storage units.

Introduction

For open systems and iSeries hosts, a host system must be created each host, and one or more host system attachments must be created and attached to the storage unit before the storage unit allows the host to access the data.

Note: Host systems do not need to be created for FICON hosts, since they provide anonymous attachment to the storage unit.

No data is displayed in the table if no hosts are defined.

Menu path

Real-time manager or Simulated manager > Manage hardware > Host systems

Fields

Select: Select the check box to perform actions on specific table rows.
Nickname: The nickname for the host. Nicknames are user-specified when the host is created, and can be used as part of an overall scheme or naming convention for making resources easier to identify and manage. The name is limited to 16 characters.
Type: The host manufacturer, platform, and host type abbreviation (in parentheses). The host type is selected when the host system is created.
Host ports: The total quantity of host ports that are defined for this host system. A host port refers to a single physical port on a host bus adapter with a unique WWPN.
Attachments: The quantity of host attachments that are defined for this host. A host attachment consists of one or more host ports that are grouped together so that multiple host ports can easily be configured in the same way. Configuring the host attachment for connection to one or more storage units configures all of the ports in that host attachment to connect to the same storage units.
Attachment types: The type of attachment (for example, FCAL, FCSF, or FICON). The attachment types indicate both the Upper Layer Protocol (ULP) and the topology of the attachments that are defined for this host. The FcAl type indicates a SCSI ULP with a FC-AL topology. The FcSf type indicates a SCSI ULP with a point-to-point or switched fabric topology. The FICON type indicates a FICON ULP with a point-to-point or switched fabric topology.
Storage units: The quantity of storage units to which this host system is attached via one or more host attachments. If the host is attached to only a single storage unit, then the storage unit nickname is displayed. If the host is attached to more than one storage unit, then the quantity of storage units is displayed as a hyperlink that takes you to the Storage Units page, but shows you only the storage units attached to this host.