Technical data

System Management Release Notes

5.9 OpenVMS Cluster Systems

To avoid this problem when upgrading, use one of the following procedures:

• Upgrade all systems before adding the CCMAA-xx MEMORY CHANNEL

adapters.

• If you have MEMORY CHANNEL hubs, power them off before upgrading

each system.

After all systems have been upgraded, power on the MEMORY CHANNEL

hubs.

• If the nodes are connected directly in a virtual hub conﬁguration, disconnect

the MEMORY CHANNEL cables before upgrading each system.

After all systems have been upgraded, reconnect the MEMORY CHANNEL

cables.

For detailed information about setting up the MEMORY CHANNEL hardware,

see the MEMORY CHANNEL User’s Guide (order number EK–PCIMC–UG.A01).

You can copy this manual from the OpenVMS Version 7.3 CD–ROM using the

following ﬁle name:

[DOCUMENTATION]HW_MEMORY_CHANNEL2_UG.PS

5.9.12 Boot Support for Multipath Devices with an HSZ Allocation Class

V7.2

All AlphaServer systems that support the KZPBA-CB, except the AlphaServer

2x00(A), support booting from devices with an HSZ allocation class. (Allocation

class support was added to these controllers to support SCSI multipath failover

on OpenVMS.)

The minimum required Alpha console ﬁrmware for OpenVMS V7.3 is Version

5.9.

5.9.13 Failover Between Local Paths and MSCP Served Paths

V7.2

Failover from a local path (to a SCSI or Fibre Channel device) to an MSCP-served

path to that same device is not currently available. This type of failover is

planned for delivery after the release of OpenVMS Version 7.3.

Although failover to an MSCP path is not yet available, multipath devices can be

MSCP served to other systems in an OpenVMS Cluster system. Failover between

MSCP served systems works as for all devices.

5.9.14 Multipath SCSI and Fibre Channel Shadow Sets: Adjustments to

System Parameters

V7.2

The use of default settings for certain system parameters may lead to the

occasional removal of shadow set members (systems which are using Compaq

Volume Shadowing for OpenVMS) that are conﬁgured for multipath support.

Therefore, when conﬁguring multipath shadow sets using Volume Shadowing

for OpenVMS, follow the recommendations in Table 5–2 for setting these system

parameters.

System Management Release Notes 5–19