Technical data

System Management Release Notes

5.9 OpenVMS Cluster Systems

5.9.6 OpenVMS Version 7.2-1 Installation Restrictions for Fibre Channel

V7.2-1

Note that the OpenVMS Alpha Version 7.2-1 CD–ROM does not support the

KGPSA-BC or KGPSA-CA. You must install the operating system to a disk that

is not accessed through the KGPSA-BC or KGPSA-CA, then apply the latest

FIBRECHAN kit, and reboot to use the KGPSA-BC or KGPSA-CA.

This restriction applies only to OpenVMS Alpha Version 7.2-1. It does not apply

to OpenVMS Alpha Version 7.2-1H1 or OpenVMS Alpha Version 7.3. Also note

that although versions prior to DEC-AXPVMS-VMS721_FIBRECHAN-V0300-

4.PCSI will conﬁgure disks on the HSG60, you may have errors when you use

these devices. These errors may be logged as

INVALID INQUIRY

errors, and

redundant paths to the HSG60 may fail to be conﬁgured.

Before using the HSG60, Compaq recommends the following procedure:

1. Install the operating system to a disk that is not on an HSG60.

2. Apply the DEC-AXPVMS-VMS721_FIBRECHAN-V0300-4.PCSI kit.

3. Reboot.

5.9.7 Devices Not Conﬁgured if HSG Host Connection Table Is Full

V7.3

When a Fibre Channel host bus adapter is connected (through a Fibre Channel

switch) to an HSG controller, the HSG creates an entry in the HSG connection

table. There is a separate connection for each host bus adapter, and for each HSG

port to which the adapter is connected. (Refer to the HSG CLI command SHOW

CONNECTIONS.)

Once a connection exists, you can modify its parameters by using commands that

are described in the HSG Array Controller ACS Conﬁguration and CLI Reference

Guide. Since a connection can be modiﬁed, the HSG does not delete connection

information from the table when a host bus adapter is disconnected. Instead,

when the user is done with a connection, the user must explicitly delete the

connection using a CLI command.

The HSG supports a limited number of connections: ACS V8.5 allows a maximum

of 64 connections and ACS V8.4 allows a maximum of 32 connections. The

connection limit is the same for both single and dual redundant controllers. Once

the maximum number of connections is reached, new connections will not be

made. When this happens, OpenVMS will not conﬁgure disk devices, or certain

paths to disk devices, on the HSG.

The solution to this problem is to delete old connections that are no longer

needed. However, if your Fibre Channel fabric is large and the number of active

connections exceeds the HSG limit, then you must reconﬁgure the fabric or use

FC switch zoning to ‘‘hide’’ some adapters from some HSG ports to reduce the

number of connections.

In a future version of OpenVMS, a message will be displayed when OpenVMS

detects that the HSG connection table is full.

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