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TruCluster Software Products
Hardware Configuration Technical Update for
DS-DWZZH-05 UltraSCSI Hub
December 1998
Product Version:
Operating System and Version: Compaq's DIGITAL UNIX Version
This technical update describes how to configure the DS-DWZZH-05
UltraSCSI hub in a TruCluster Software Products environment.
Compaq Computer Corporation
Houston, Texas
TruCluster Production Server
Software Software Version 1.4A and
TruCluster Production Server
Software Version 1.5 and TruCluster
Available Server Software 1.4A and
TruCluster Available Server Software
Version 1.5
4.0B and Compaq's DIGITAL UNIX
Version 4.0D
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Table of Contents
Related Manuals for Compaq DS-DWZZH-05
Summary of Contents for Compaq DS-DWZZH-05
- Page 1 TruCluster Available Server Software Version 1.5 Operating System and Version: Compaq’s DIGITAL UNIX Version 4.0B and Compaq’s DIGITAL UNIX Version 4.0D This technical update describes how to configure the DS-DWZZH-05 UltraSCSI hub in a TruCluster Software Products environment. Compaq Computer Corporation Houston, Texas...
- Page 2 ULTRIX Mail Connection, ULTRIX Worksystem Software, UNIBUS, VAX, VAXstation, VMS, XUI, and the Compaq logo. Prestoserve is a trademark of Legato Systems, Inc.; the trademark and software are licensed to Compaq Computer Corporation by Legato Systems, Inc. NFS is a registered trademark of Sun Microsystems, Inc.
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Page 3: Table Of Contents
DS-DWZZH-05 Front View ......... . 2–5 2–2 DS-DWZZH-05 Rear View .......... . 2–6 2–3 TruCluster Configuration Using KZPSA SCSI Adapters, a... - Page 4 TruCluster Configuration Using a KZPBA-CB UltraSCSI Adapter, a DS-DWZZH-05 UltraSCSI Hub, and an HSZ70 RAID Array Controller ..........
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Page 5: About This Technical Update
This technical update provides important information about using the DS-DWZZH-05 UltraSCSI hub with the TruCluster software products. Audience If you plan to use a DS-DWZZH-05 UltraSCSI hub in a TruCluster hardware configuration, read this addendum to the TruCluster Software Products Hardware Configuration manual. Organization This technical update contains an introductory chapter and a chapter covering the use and configuration of the DS-DWZZH-05 UltraSCSI hub in... -
Page 7: Ds-Dwzzh-05 Ultrascsi Hub
1.5 and TruCluster Available Server Software Version 1.4A and TruCluster Available Server Software Version 1.5 products. 1.1 General Overview The DS-DWZZH-05 UltraSCSI hub was recently qualified for use with the TruCluster Production Server Software Version 1.4A and TruCluster Production Server Software Version 1.5 and TruCluster Available Server Software Version 1.4A and TruCluster Available Server Software Version... -
Page 8: Ds-Dwzzh Overview
SCSI bus segment can be up to 25 meters in length. This allows a total separation of nearly 50 meters between a system and the storage. For more information on the DS-DWZZH-05 UltraSCSI hub, see the following documents: •... -
Page 9: Using The Ds-Dwzzh-05 Ultrascsi Hub In A Cluster Configuration
SCSI bus segment. _____________________ Note _____________________ Do not put trilinks on the DS-DWZZH-05 as it is not possible to remove the DS-DWZZH-05 internal termination. • Requires that termination power (termpwr) be provided by the SCSI bus host adapters on each SCSI bus segment. - Page 10 ESA 10000 RAID array subsystems. This position minimizes cable lengths and interference with disks. A DS-DWZZH-05 UltraSCSI hub uses the DS-BA356, BA356, or BA370 shelf only to provide its power and mechanical support (it is not connected to the shelf internal SCSI bus).
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Page 11: Ds-Dwzzh-05 Fair Arbitration
After the host adapter has been serviced, if there are still SCSI IDs retained from the previous arbitration cycle, the next highest SCSI ID is serviced. When all devices in the group have been serviced, the DS-DWZZH-05 repeats the sequence at the next arbitration cycle. -
Page 12: Ds-Dwzzh-05 Address Configurations
SCSI ID 7 is reserved for the DS-DWZZH-05 whether fair arbitration is enabled or not. Jumper W1, accessible from the rear of the DS-DWZZH-05 (see Figure 2–2) determines which addressing mode is used. The jumper is installed to select narrow addressing mode and is presently the only addressing mode supported with Compaq’s DIGITAL UNIX operating system. -
Page 13: Ds-Dwzzh-05 Front View
Port SCSI ID SCSI ID 6 - 4 (6 - 0) (14) Power Host Port SCSI ID Busy (15) Host Port Host Port SCSI ID SCSI ID (12) (13) ZK-1447U-AI Using the DS-DWZZH-05 UltraSCSI Hub in a Cluster Configuration 2–5... -
Page 14: Scsi Bus Termination Power
The remainder of the SCSI bus operates normally. 2.6 DS-DWZZH-05 Indicators The DS-DWZZH-05 has two indicators on the front panel (see Figure 2–1). The green LED indicates that power is applied to the hub. The yellow LED indicates that the SCSI bus is busy. -
Page 15: Installing The Ds-Dwzzh-05 Ultrascsi Hub
If fair arbitration is selected on the DS-DWZZH-05 UltraSCSI hub, ensure that the host adapter SCSI ID matches the controller port SCSI ID on the DS-DWZZH-05 for the port that the adapter will be cabled to. Using the DS-DWZZH-05 UltraSCSI Hub in a Cluster Configuration 2–7... -
Page 16: Cabling The Raid Array Storage Subsystem To The Ds-Dwzzh-05 Ultrascsi Hub
• Connect a BN38C cable between the host adapter and the appropriate DS-DWZZH-05 UltraSCSI hub port. Each connection forms a SCSI bus segment with the host adapter and the hub. The maximum length of a SCSI bus segment, including cable and internal device bus length, is 25 meters. -
Page 17: Ds-Dwzzh-05 Ultrascsi Hub, And An Hsz50 Raid Array
Figure 2–3 shows a sample configuration that uses KZPSA-BB SCSI adapters, a DS-DWZZH-05 UltraSCSI hub, and an HSZ50 RAID array controller. Figure 2–3: TruCluster Configuration Using KZPSA SCSI Adapters, a DS-DWZZH-05 UltraSCSI Hub, and an HSZ50 RAID Array Controller AlphaServer... -
Page 18: Cabling An Hsz70 To A Ds-Dwzzh-05 Ultrascsi Hub
HSZ70 controller that will be on the end of the SCSI bus segment. If there are two HSZ70 controllers, connect the two H8861-AA trilink connectors on the controllers with a BN37A cable. Connect the DS-DWZZH-05 to the HSZ70 H8861-AA trilink with a BN37A cable. _____________________... -
Page 19: Controller
Figure 2–4: TruCluster Configuration Using a KZPBA-CB UltraSCSI Adapter, a DS-DWZZH-05 UltraSCSI Hub, and an HSZ70 RAID Array Controller AlphaServer Member System 1 KZPBA-CB KZPBA-CB DS-DWZZH-05 AlphaServer Member System 2 HSZ70 KZPBA-CB KZPBA-CB HSZ70 AlphaServer AlphaServer Member Member System 3... - Page 20 The maximum length of the SCSI bus segment, including BN38C cable and internal device length, must not exceed 25 meters. b The maximum length of the SCSI bus segment, including the combined length, of BN37A cables and internal device length, must not exceed 25 meters. 2–12 Using the DS-DWZZH-05 UltraSCSI Hub in a Cluster Configuration...
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