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Table 4.4 hcd definition for 64 lvis, Table 4.5 hcd definition for 256 lvis, 2 hardware definition using hcd (mvs/esa) – Compaq 9900 User Manual

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Hitachi Lightning 9900™ User and Reference Guide

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4.2.2 Hardware Definition Using HCD (MVS/ESA)

The Hardware Configuration Definition (HCD) utility can be used to define the 9900
subsystem in an MVS/ESA environment. The HCD procedures for 3990 and 2105 controller
emulation types are described below. FICON™ support requires 2105-F20 emulation.

3990 Controller Emulation. To define a 9900 subsystem with 64 or fewer LVIs, use the same
procedure as for an IBM

®

3990-6, 3990-6E, or 3990-3 subsystem (see Table 4.4). The

hardware definition for a 9900 subsystem with more than 64 LVIs (see Table 4.5) is different
than that for an IBM

®

3990 subsystem.

Table 4.4

HCD Definition for 64 LVIs

Parameter Value

Control Frame:

Control unit number

Specify the control unit number.

Control unit type

3990-6 or 3990-6E (using 3990-6 emulation)

3990-3 (using 3990-3 emulation)

Channel path IDs

Specify ExSA™ or FICON™

Unit address

00 (ExSA™ or FICON™)

Number of units

64

Array Frame:

Device number

Specify the first device number.

Number of devices

64

Device type

3390

Connected to CUs

Specify the control unit number(s).

Table 4.5

HCD Definition for 256 LVIs

Parameter Value

Control Frame:

Control unit number

Specify the control unit number.

Control unit type

NOCHECK*

Use UIM 3990 for more than 128 logical paths

Use UIM 3990-6 for 128 or fewer logical paths

Channel path IDs

Specify ExSA™ or FICON™

Unit address

00 (ExSA™ or FICON™)

Number of units

256

Array Frame:

Device number

Specify the first device number.

Number of devices

256

Device type

3390

Connected to CUs

Specify the control unit number(s).

*Note: The NOCHECK function was introduced by APAR OY62560. Defining the 9900 as a single control unit allows all channel

paths to access all DASD devices.