Compaq AA-RHGWC-TE - Manual (Page 87)

6. Copy the appropriate release notes to your system disk. In this
example, obtain the firmware release notes for the AlphaServer
DS20 from the Version 5.6 Alpha Firmware Update CD-ROM:
# cp /mnt/doc/ds20_v56_fw_relnote.txt ds20-rel-notes
7. Unmount the CD-ROM drive:
# umount /mnt
8. Print the release notes.
4.3 TruCluster Server Hardware Installation
Member systems may be connected to a shared SCSI bus with a peripheral
component interconnect (PCI) SCSI adapter. Before you install a PCI SCSI
adapter into a PCI slot on a member system, ensure that the module is at
the correct hardware revision.
The qualification and use of the DS-DWZZH-series UltraSCSI hubs in
TruCluster Server clusters allows the PCI host bus adapters to be cabled
into a cluster in two different ways:
• Preferred method with radial connection to a DWZZH UltraSCSI hub
and internal termination: The PCI host bus adapter internal termination
resistor SIPs are not removed. The host bus adapters and storage
subsystems are connected directly to a DWZZH UltraSCSI hub port.
There can be only one member system connected to a hub port.
The use of a DWZZH UltraSCSI hub in a TruCluster Server cluster is
preferred because it improves the reliability to detect cable faults.
• Old method with external termination: Shared SCSI bus termination is
external to the PCI host adapters. This is the old method used to connect
a PCI host adapter to the cluster; remove the adapter termination
resistor SIPs and install a Y cable and an H879-AA terminator for
external termination. This allows the removal of a SCSI bus cable from
the host adapter without affecting SCSI bus termination.
This method (discussed in Chapter 9 and Chapter 10) may be used with
or without a DWZZH UltraSCSI hub. When used with an UltraSCSI
hub, there may be more than one member system on a SCSI bus segment
attached to a DS-DWZZH-03 hub port.
The following sections describe how to install the KZPBA-CB
PCI-to-UltraSCSI differential host adapter and configure them into
TruCluster Server clusters using the preferred method of radial connection
with internal termination.
TruCluster Server System Configuration Using UltraSCSI Hardware 4–5