Modify host system — Specify storage unit parameters

Use this page to modify the storage unit parameters.

Introduction

The following is a list of permissible modifications and the resulting actions:

If you select an existing host attachment Identifier from the Select host attachment identifiers table, you can:
- Select another volume group for this host attachment by choosing from the Select volume group for host attachment box.
- Select the Create new group button to create a new group for selection.
- Select the alternate radio button, any storage unit port, any storage unit port up to x ports, or the following specific storage unit ports. If you select the latter for the modification, you must specify the ports in the Available storage unit ports table.
If you select a new host attachment that was added in the Modify host system - Define host ports page, you must proceed through this page as you would in the Create mode of the wizard.

Menu path

Real-time manager or Simulated manager > Manage hardware > Host systems > Select a host > Select Action: Modify... > Go

Fields

Storage unit

The storage unit nickname and, sequentially, the storage unit for which you are currently defining parameters.

Select host attachment identifier

The columns are defined as follows:

Select: The check boxes for the ports.
Storage Units: The number of storage units to which this host attachment is attached. Once you attach the host attachment to the storage unit and select the Apply assignment button, the quantity value in this column increases by one for this identifier.
Identifier: The host attachment identifier. The format: abbreviated nickname, abbreviated host type, abbreviated attachment type (the quantity of ports grouped and order of creation if the prior data is the same).

Select volume group for host attachment

A drop-down list of the available and valid volume groups. You can defer selection of a volume group until later by selecting the Select volume group later option in the list.

Note: A host system identifier can select only one volume group per storage unit; in other words, a single WWPN can access only one volume group per storage unit.

Create new group

Creates a new volume group. After you create a new volume group, the table resets to reflect the new volume group and you can select it for this host attachment.

Any valid storage unit I/O port

Enables the host attachment to log in to any of the available storage unit ports.

The following specific storage unit I/O ports

Enables the View recommended check box and the Available storage unit ports table. This selection is necessary for Anonymous FICON hosts in order to define the following I/O ports as FICON protocol.

Note: If there are no compatible host ports on this storage unit to attach the host to, use the Configure I/O Ports page to modify the I/O port properties. The I/O port properties can be changed only from the Configure I/O Ports page.

View recommended

Becomes enabled when you select the specific storage unit ports radio button. If you select this check box, the recommended storage unit port assignments are selected in the Available storage unit ports table.

Available storage unit I/O ports

Becomes enabled when you select the following specific storage unit ports radio button or if the selected identifier is a zSeries Network identifier. You can select up to all of the storage unit ports for the host attachment. If you select the View recommended check box, the recommended storage unit port assignments are selected in the table.

Note: Selecting the storage unit port for this identifier defines the protocol for this port (FCP or FICON). For example, if you select an identifier that is FcAl and attach it to a storage unit port, then the port is unable to attach to any attachment type other than FcAl.

Column headings:

Select: The check boxes for the ports.
Host attachment: The number of host attachment assigned to this storage unit port. Once you assign the host attachment to the storage unit port and select the Apply assignment button, the quantity value in this column increases by one for this storage unit port.
Location: The location that provides the physical link. The value of the location code (R1-I3-C2-T1) is a combination of a rack, I/O enclosure, card, and port, where the format is R[1 - 2]-I[1 - 8]-C[1 - 6]-T[1 - 4].
Type: The current type definition for the I/O port (for example, FcAl, FcSf, or FICON).

Configure I/O Ports... button

Configures I/O ports. After you configure I/O ports, the table refreshes and you can select the new I/O port configuration for this storage unit.

Apply assignment button

Applies the current attachment assignment. Use this button to go through this page repeatedly for each host attachment identifier that you want to assign to the storage unit.