RA7000 / ESA10000
High Availability Solution Kit
for HP-UX
Installation Guide
EK–HAHPU–MH. B01
Digital Equipment Corporation
Maynard, Massachusetts
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Contents
Revision Record
About This Guide
An Overview of the RAID High Availability Cluster Solution for HP-UX .........................vii
Defining a “Clustered Host Server” ................................................................................. viii
Audience ......................................................................................................................... viii
Document Structure......................................................................................................... viii
Associated Documents.........................................................................................................x
Conventions........................................................................................................................xi
Support and Services ..........................................................................................................xi
DIGITAL StorageWorks Web Site Address.......................................................................xii
Getting Started
RA7000 / ESA10000 (HA) Cluster Solution for HP-UX ROADMAP............................... xiii
1
Pre-Installation Steps
1.1 Verify (RA7000/ESA10000 for HP-UX) Cluster Requirements ..............................1–1
1.2 Inventory the RAID SCSI Connection Kit...............................................................1–2
1.3 Perform a System Backup.......................................................................................1–4
1.4 Plan the Cluster Layout (SCSI Bus Interconnect) ...................................................1–4
1.5 Prepare the SCSI Host Adapters..............................................................................1–6
1.5.1
1.5.2
Set Unique SCSI Host Adapter IDs...................................................................1–6
SCSI Host Adapter Resistor Pack Removal (for mid-bus or end-bus RAID cluster
layouts only).....................................................................................................1–7
2
Cabling the RAID Subsystem Cluster Components
2.1 Connecting RAID Subsystem Components through the SCSI Bus...........................2–1
2.2 Mid-Bus RAID Cluster Layout - (SCSI Bus Interconnect) .....................................2–2
2.3 HUB-Radiant RAID Cluster Layout - (SCSI Bus Interconnect)...............................2–3
2.4 End-Bus RAID Cluster Layout - (SCSI Bus Interconnect).......................................2–4
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
3
Software Setup Requirements for a Cluster
3.1 Software Requirements Summary...........................................................................3–1
3.2 Installing the StorageWorks CC RAID Manager Software ......................................3–1
3.3 Creating the RAID Storageset Configuration ..........................................................3–2
3.4 Installing and Configuring MC/ServiceGuard Cluster Software ..............................3–2
3.5 Running the SWCC Failover Transition Module Installation Script ........................3–3
A Cabling and Termination Required to Expand a Cluster
A.1 Hardware Configuration of an Expanded Cluster ................................................... A–1
A.1.1
A.1.2
Adding Host Servers to an Existing Cluster ..................................................... A–2
Adding a Second RAID Subsystem to an Existing Cluster ............................... A–4
B De-Installing the StorageWorks Command Console Agent
B.1 StorageWorks CC Agent De-Installation Procedures.............................................. B–1
Figures
1
RAID High Availability Cluster Concept..................................................................vii
1–1 SCSI Host Adapter Model A28696A.......................................................................1–8
1–2 SCSI Host Adapter Model A2969A ........................................................................1–8
1–3 SCSI Host Adapter Model A4107A ........................................................................1–9
2–1 Mid-Bus RAID Cluster Layout (SCSI Bus Interconnect).........................................2–2
2–2 Hub-Radiant RAID Cluster Layout (SCSI Bus Interconnect) ..................................2–3
2–3 End-Bus RAID Cluster Layout (SCSI Bus Interconnect).........................................2–4
A–1 Expanded Cluster................................................................................................... A–2
A–2 Adding Host Servers to an Existing Cluster ........................................................... A–3
Tables
1
Associated StorageWorks and HP Documents.............................................................x
Style Conventions......................................................................................................xi
2
1–1 RAID RA7000 / ESA10000 for HP-UX - Cluster Prerequisites...............................1–1
1–2 RAID SCSI Connection Kit Contents (by kit number) ...........................................1–3
1–3 RAID Subsystem Basic Cluster (SCSI Bus) Layout Options ...................................1–5
iv
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Revision Record
This Revision Record provides a concise publication history of this manual. It lists the
manual revision levels, release dates, and reasons for the revisions.
The following revision history lists all revisions of this publication and their
effective dates. The publication part number is included in the Revision Level
column, with the last entry denoting the latest revision.
This publication supports the StorageWorks RA7000 / ESA10000 Subsystem
configured with or without a SCSI hub interconnect to two Hewlett Packard host
servers running the HP-UX (Version 10.20 or later) operating system. The SCSI
host adapters supported are HP models A28696A, A2969A and A4107A (all
High Density 68-Pin compatible). Hewlett Packard MC/ServiceGuard (Version
10.10 or later) is the cluster software supported by this publication.
Revision Level
Date
Summary of Changes
EK–HAHPU–MH. A01
July 1998
Original release.
EK–HAHPU–MH. B01
September 1998 Second release.
EK–HAHPU–MH. B01
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About This Guide
This section provides an overview of a StorageWorks RAID high availability (HA) cluster
storage environment and defines the scope and conventions of this guide. It identifies
associated reference documentation, and the StorageWorks sales, service, and technical
support contacts worldwide.
An Overview of the RAID High Availability Cluster Solution for HP-UX
The RA7000 / ESA10000 Cluster solution for HP-UX enables two (or more)
Hewlett Packard host servers to share a RAID storage subsystem through a SCSI
bus, with MC/ServiceGuard cluster software. Should a failure on a host server
occur, the failure is detected and the I/O is re-routed through to a functioning
host server. This process, called failover, requires no resource downtime -
ensuring the high availability of data. The failed component(s) can be warm-
swapped or serviced while functioning components remain active.
Figure 1 RAID High Availability Cluster Concept
Heartbeat 1
Server A
A
Server B
A
Heartbeat 2
Clients
RAID
Subsystem
-
SH R -1024
Figure 1 shows a basic cluster layout, where two host servers share a RAID
subsystem via a single SCSI bus. It is possible to expand a cluster to include
additional host servers on a single SCSI bus, or a second RAID subsystem on a
separate SCSI bus. Illustrations of expanded clusters are provided in Appendix
A of this guide.
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
Defining a “Clustered Host Server”
For the host servers to be considered part of “the cluster” (e.g., share the RAID
subsystem(s) and possess I/O failover capabilities), each server must be
configured with MC/ServiceGuard cluster software, (including a “package” to
failover the RAID CC agent), and the SCSI pass through device drivers that
enable the SWCC agent to communicate with the RAID subsystem(s).
This guide provides a master procedural roadmap to establish a “basic” cluster of
shared RAID storage, focusing on cluster hardware and software configuration
tasks. It begins with a new, boxed RAID subsystem and two HP host servers.
Procedures for expanding a cluster are also discussed.
Audience
This guide is intended for experienced administrators and system integrators of
HP host server and StorageWorks RA7000 / ESA10000 storage subsystem
equipment. Setting up a cluster requires a general understanding of HP server
networks, RAID storage concepts, HP MC/ServiceGuard cluster software and
SCSI hardware configurations. Or, contact your service representative for
installation assistance.
Document Structure
This guide contains the following chapters:
Getting Started
This section provides a roadmap to serve as the master procedural guide for
establishing a cluster.
Chapter 1: Pre-Installation Steps
This chapter addresses the preparation needed before installing the hardware
components of the RAID subsystem cluster. It provides a guide to your options in
planning the cluster layout (e.g., the shared RAID subsystem, host servers and, if
applicable, the SCSI hub), through the SCSI bus. This chapter also describes how
to prepare the two SCSI host adapter boards for a cluster environment.
viii
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About This Guide
Chapter 2: Cabling the RAID Subsystem Cluster Components
This chapter describes the procedures for cabling a RAID subsystem to two HP
host servers based on the cluster (SCSI) layout option selected in of
Chapter 1
this guide. (Reference Appendix A if clustering more than two hosts or more
than one RAID subsystem). It provides detailed illustrations of the cabling and
termination required to support HD68-pin SCSI host adapter compatibility, and
the use of a SCSI hub.
Chapter 3: Software Setup Requirements for a Cluster
This chapter summarizes and describes, in sequence, each of the software setups
required to establish a cluster environment between multiple HP-UX host servers
and a shared RAID storage subsystem. It explains how to access, invoke and
interact with the SWCC Failover Transition Module Installation Script, which
automatically configures the cluster for the seamless failover of the
StorageWorks Command Console RAID Manager agent in the event of a server
shutdown.
Appendix A: Cabling and Termination Required to Expand a Cluster
An expanded cluster is one in which more than two host servers are connected to
a RAID subsystem on the same SCSI bus, or where a second RAID subsystem is
added to the cluster on a separate SCSI bus. Appendix A provides the hardware
cabling and termination, and highlights the software configurations required to
expand a cluster.
Appendix B: De-Installing the SWCC Failover Transition Module
This appendix describes how to reverse the installation of the StorageWorks
Command Console Failover Transition Module (agent) within a cluster.
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
Associated Documents
In addition to this guide, the following documentation is useful to the reader:
Table 1 Associated StorageWorks and MC/ServiceGuard Documents
DIGITAL StorageWorks Document Title
Order Number
Getting Started - HSZ70 Solutions Software V7.1
for HP-UX
AA-R84KB-TE
Release Notes - RAID Array 7000 / Enterprise Storage
Array 10000 for HP-UX
AA-R84LA-TE
RA7000 and ESA10000 Storage Subsystem User’s Guide
EK-SMCPP-UG
Configuring Your StorageWorks Subsystem HSZ70
Array Controllers Version 7.0
EK-HSZ70-CG
EK- HSZ70-SV
Servicing Your StorageWorks Subsystem HSZ70
Array Controllers HSOF Version 7.0
16-Bit SCSI Bus Hub (DWXXH)
EK-DWZZH-UG
AA-R60EA-TE
SWCC Command Console 2.0 User’s Guide
CLI Reference Manual HSZ70 Array Controllers
HSOF Version 7.0
EK-CLI70–RM
HP MC/ServiceGuard Document Title
HP A2969A HP-HSC Fast/Wide Differential SCSI Adapter
Installation and Service guide
A2969-90001
HP-PB Fast/Wide High-Performance SCSI Adapter
Installation and Service guide (for host adapter 28696)
28696-90001
A4107-90001
H6487
HP A4107A SCSI Adapter Installation and Service guide
Hands-On with High Availability and MC/ServiceGuard
Student Workbook (Version A.02)
Managing MC/ServiceGuard
B3936-90019
To Order HEWLETT PACKARD products
To order Hewlett Packard MC/ServiceGuard cluster software/documentation,
contact your local sales representative, or contact the HP Customer Support
hotline at:
US Customers: 1-800-633-3600
Hewlett Packard Customer Support can also be reached through electronic mail
at:
x
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About This Guide
Conventions
In this guide, references to
StorageWorks RAID Array, controller, HSZ70 or
pertain to
subsystem
•
RAID Array 7000 (RA7000) or Enterprise Storage Array (ESA) 10000
The term High Availability is abbreviated as (HA).
This guide uses the following documentation conventions:
Table 2 Style Conventions
Style
Meaning
boldface monospace type
To be input by the user.
italic type
For emphasis, manual titles, utilities, menus,
screens, and filenames.
plain monospace type
#
Screen text.
Represents the HP system prompt. Do not
type it as part of information to be input by
the user.
StorageWorks Support and Services
Who to contact in the Americas
Information and Product Questions:
Local Sales Office / StorageWorks Hotline
1-800-786-7967
Installation Support:
Contact the DIGITAL Distributor where the
Storage Solution was Purchased / Local
DIGITAL Sales Office.
DIGITAL Multivendor Customer Service (MCS)
Installation
Contact the DIGITAL Customer Support
Center (CSC).
Warranty
Contact the DIGITAL Customer Support
Center (CSC) for warranty service after s
olution is installed and operating.
Remedial
Contact the DIGITAL Customer Support
Center (CSC).
Note: A Service Contract is recommended
when the equipment is out of warranty.
Contact the local DIGITAL Sales Office.
Customer Support Center (CSC)
1- 800-354-9000
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
Who to contact in Europe
Information and Product Questions,
Contact the DIGITAL Distributor or reseller
Installation Support, and Installation:
from whom the Storage Solution was
purchased.
For Warranty Service
For Remedial Service
See the Warranty Card packaged with the
product.
Contact the DIGITAL Distributor or reseller
from whom the Storage Solution was
purchased.
Note: A Service Contract is recommended
when the equipment is out of warranty.
Who to contact in Asia Pacific
For all services, contact the DIGITAL Distributor or reseller from whom the
equipment was purchased.
Visit our Web Site for the Latest Information
The latest StorageWorks documentation and technical tips can be found at:
xii
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Getting Started
This section contains a roadmap to serve as your master guide for establishing a high
availability cluster between two or more HP-UX host servers and a shared RAID
subsystem. This roadmap presides over all other documentation supplied with your
equipment, and refers to those resources as more technical depth is required.
RA7000 / ESA10000 (HA) Cluster Solution for HP-UX
- - - - - - - - - - - RoadMap - - - - - - - - - - -
STEP PERFORM THIS PROCEDURE…
DESCRIBED IN…
RA7000 / ESA10000 Cluster
Solutions for HP-UX - Chapter 1
All Pre-Installation steps,
Including…
1
◊ Verify Cluster Requirements
◊ Verify SCSI Connection Kit Contents
◊ Perform a System Backup
◊ Plan the Cluster (SCSI bus) Layout
◊ Prepare the SCSI Host Adapters
Getting Started HSZ70 Solutions
Software V7.1 for HP-UX –
Chapter 1 or 2
Unpack and Setup the RAID
Subsystem
2
RA7000 / ESA10000 Cluster
Solutions for HP-UX – Chapter 2
Cable and Terminate the Cluster
Components
3
4
Install the StorageWorks Command
Console (CC) RAID Manager Software
Getting Started HSZ70 Solutions
Software V7.1 for HP-UX –
Chapter 4
Getting Started HSZ70 Solutions
Software V7.1 for HP-UX –
Create the RAID Storage Configuration
5
Chapter 6 or 7 and Appendix B
Install/Configure HP MC/ServiceGuard
on all Clustered Host Servers
(HP) Managing MC/ServiceGuard
manual
6
7
8
RA7000 / ESA10000 Cluster
Solutions for HP-UX – Chapter 3
Run the SWCC Failover Transition
Module Installation Script
(HP) Managing MC/ServiceGuard
manual
Test, Monitor and Manage the Cluster
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1
Pre-Installation Steps
This chapter addresses the preparation needed before installing and configuring the
RA7000 / ESA10000 cluster hardware components.
The pre-installation steps required to support a cluster are as follows:
•
•
•
•
•
Verify Cluster Requirements
Inventory the SCSI Connection Kit
Perform a System Backup
Plan the Cluster Layout (e.g., the SCSI Bus Interconnect)
Prepare the SCSI Host Adapters
1.1 Verify (RAID RA7000/ESA10000 for HP-UX) Cluster Requirements
Please verify that the cluster requirements listed in Table 1-1 are met.
Table 1–1 RAID RA7000 / ESA10000 for HP-UX – Cluster Prerequisites
Host Feature
Platform
Requirement
Two (minimum) HP host servers
HP-UX version 10.20 or later
Operating System
Cluster Software
Free Disk Space
Storage Subsystem
HP MC/ServiceGuard version 10.10 or later
500KB per server for MC/ServiceGuard software
StorageWorks RA7000 or ESA10000 RAID
subsystem
RAID Controllers
Two StorageWorks HSZ70 controllers per RAID
subsystem, trilinked, operating firmware V7.0
SCSI Host Adapters
HP, HD68-pin (one adapter per host server).
Supported models: A28696A, A2969A, A4107A.
Additional Items
Requirement
RAID SCSI Connection Kit
RAID Hardware
(Reference Table 1-2 for contents)
xx
RAID subsystem kit DS-SWXRA-
Service Tools
Appropriate tools to service your equipment
Technical Documentation
The reference guides for the RAID subsystem, HP
servers and MC/ServiceGuard cluster software
supplement this installation guide.
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
NOTES
1. All of the host features that are supported by
the platform kit are also supported in the
RAID/HP cluster environment
2. The installation of a hub requires a 3.5” SSB
slot available in your StorageWorks pedestal
or shelf.
1.2 Inventory the RAID SCSI Connection Kit
Three types of RAID SCSI Connection Kits exist. Each kit supports the
connection of two host servers to a RAID subsystem via a single SCSI bus. To
connect more than two host servers in a cluster, or to add a second RAID
subsystem, additional parts must be ordered (Reference Appendix A for parts
required to expand a cluster). The part numbers and purpose served by each kit is
as follows:
•
•
•
SWXKT-DE – for connecting the RAID subsystem to servers having
HD68-pin host adapters
SWXKT-DF* – for connecting the RAID subsystem to servers having
VHDCI (UltraSCSI) host adapters
SWXKT-EA – for connecting the RAID subsystem through a hub to servers
having either
(both
HD68-pin or VHDCI host adapters
adapters must be the same type)
*This kit is not applicable to a RAID RA7000 / ESA10000 Cluster for HP-UX
Please verify that the connection kit you have received is specific to your cluster
needs, and use Table 1-2 to inventory its contents. If you are missing any
hardware component required for a cluster, please contact your local sales
representative or call the StorageWorks Hotline at 1-800-STORWORK (786-
7967).
1–2
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Chapter 1. Pre-Installation Steps
Table 1–2 RAID SCSI Connection Kit Contents (listed by kit number)
RAID SCSI Connection
Kit Parts Identification
Kit
Kit
Kit
SWXKT-DE SWXKT-EA SWXKT-DF
BN2 1K-05
1
H D 68 S traight-T hru C able
BN3 7A-05
2
1
V H D C I (U ltraS C SI) Straigh t-Thru C ab le
BN3 8C-05
1
2
1
2
1
1
V H D C I-to-H D 68 A dapter C able (5 m e te r)
BN3 8E-0B
V H D C I-to-H D 68
A da pter C ab le
BN2 1W -0B
H D 68 -Pin Y-C able
BN3 7C-0C
V H D C I Y -C a ble
2
2
H879-A A
2
H D 68
M
D ifferential Term ina to r
H8863-AA
V H D C I M D ifferential Term in ator
DS-DW ZZH -03
3 -Po rt
D iffere ntia l H ub
1
S H R -102 6
NOTES
1. Above, VHDCI (UltraSCSI) parts are shaded; HD68-Pin (fast, wide SCSI) are white.
2. To supplement the RAID SCSI Connections Kit, please locate the following
parts supplied with your RAID subsystem:
• One BN37A-05 - VHDCI UltraSCSI (straight-thru) cable (RA7000)
• One BN38E-0B - VHDCI-to-HD68-Pin Adapter cable (RA7000 / ESA1000)
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
1.3 Perform a System Backup
Follow normal procedures to backup the RAID subsystem and the host servers in
your cluster, as applicable, prior to installing any of the cluster components.
1.4 Plan the Basic Cluster Layout (SCSI Bus Interconnect)
To plan the layout of cluster components through the SCSI bus, first define the
two ends of the SCSI bus by selecting
where you want to locate the RAID
subsystem on the bus relative to the other components (the two HP hosts and, if
applicable, the SCSI Hub). Determining the RAID location depends on your
preference or any physical limitations of your facility (see
can locate the RAID subsystem:
below). You
“Note”
• In the middle of the SCSI bus - (Mid-Bus RAID)
• Radiating from a Hub - (Hub-Radiant RAID)
• On an end of the SCSI bus - (End-Bus RAID)
NOTE
The maximum bus length for a mid-bus or an end-
bus RAID layout is 25M (include the Y-cable
length when calculating total bus length).
For a hub-radiant RAID layout, the maximum
distance of each radial arm (from the hub to a
device) is 25M.
1–4
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Chapter 1. Pre-Installation Steps
Table 1–3 RAID Subsystem Basic Cluster (SCSI Bus) Layout Options
For This Cluster Layout Option
And This Type of
Host Adapter
HD68-Pin
Reference This
Section & Figure
Mid-Bus RAID
2.2
2–1
R A7000 / E S A 10000
H ost A
H ost B
S ubsystem
Mid-Bus RAID
SHR-1021
For This Cluster Layout Option… And This Type of
Host Adapter…
Reference This…
Section & Figure
Hub-Radiant RAID
HD68-Pin
2.3
2–2
H ost A
H ost B
H U B
R A7000 / E S A10000
S ubsystem
Hub-Radiant RAID
SHR-1023
For This Cluster Layout Option … And This Type of
Host Adapter…
Reference This…
Section & Figure
End-Bus RAID
HD68-Pin
2.4
2–3
R A7000 / ES A 10000
H ost A
H ost B
S ubsystem
End-Bus RAID
SHR-1022
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
Use Table 1-3 to select the basic cluster layout that best suits your environment.
Prepare and install the SCSI host adapters into your servers (as described in
Section 1.5, “Prepare the SCSI Host Adapters”). Then, reference Chapter 2, –
to proceed with the basic
Cabling the RAID Subsystem Cluster Components,
cluster installation.
1.5 Prepare the SCSI Host Adapters
Each of the host servers in the RAID subsystem cluster requires at least one
supported SCSI host adapter be installed. (Expanding a cluster with a second
RAID subsystem requires two SCSI host adapters per server). Prior to installing
the SCSI host adapter(s) into each server, as described in your HP Host Adapter
installation and service guide, you must prepare each one for a cluster
environment. This involves two main steps:
•
•
Setting a unique SCSI host adapter ID
(For Mid-Bus RAID and End-Bus RAID cluster layouts only) Removing the
resistor packs (terminators) on-board the SCSI host adapter
The procedures for setting unique SCSI host adapter IDs and removing resistor
packs from the SCSI host adapters are contained in the following sections. As
you perform these steps, reference the figure that corresponds to your SCSI host
adapter model, as follows:
SCSI Host
Adapter
Illustrated
In
A28696A
A2969A
A4107A
Figure 1-1
Figure 1-2
Figure 1-3
1.5.1 Set Unique SCSI Host Adapter IDs
It is mandatory that each server in a cluster have a unique SCSI host adapter ID
(target ID). The default setting of a SCSI host adapter ID is 7. One of the hosts in
the cluster can maintain this ID. Typically, the SCSI IDs for each added server
should decrease one number from 7, (6, 5, 4, etc.), to ensure that an unused
device number is selected for the server ID.
Use the dip switch on-board the SCSI host adapter(s) to manually set the SCSI
host adapter ID on each host server in the cluster to an unused number. (Two
host adapters in the same server can have the same SCSI ID, as long as the
adapters are not on the same SCSI bus). Reference the Figure for your SCSI host
adapter model to locate the SCSI ID dip switch pack.
1–6
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Chapter 1. Pre-Installation Steps
1.5.2 SCSI Host Adapter Resistor Pack Removal
To remove the resistor packs (terminators) on-board the SCSI host adapters in a
Mid-Bus RAID or End-Bus RAID cluster layout, reference the figure for your
host adapter board model and proceed as follows:
NOTE
Do not remove SCSI host adapter resistor packs
in hub-radiant RAID cluster layouts.
1. Follow normal procedures to shutdown all host servers in the cluster.
2. If applicable, consult the system manual to remove the cover of the server
cases and remove the SCSI host adapter board(s) from all host servers in the
cluster.
3. Locate the resistor packs on the SCSI host adapter board(s)
4. Gently remove the resistors from the SCSI host adapter boards
5. Install the SCSI host adapter board(s) into the servers according to the SCSI
host adapter installation manual supplied with your SCSI host adapter
model.
NOTE
Do not reboot the host servers at this time.
The SCSI host adapters are now prepared for a cluster environment. Proceed to
Chapter 2,
.
Cabling the RAID Subsystem Cluster Components
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RA7000 / ESA10000 High Availability Solution Kit for HP-UX
Figure 1–1 SCSI Host Adapter Model A28696A
Term ination Resistor
Packs R13, R14, R15
Faceplate
SCSI Adapter ID
Switch Pack "S1"
S H R -1122
Figure 1–2 SCSI Host Adapter Model A2969A
Term inator
Resistor Packs
R23, R24, R25
Faceplate
SCSI Adapter
ID Switch Pack "SW1"
S H R -1121
1–8
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Chapter 1. Pre-Installation Steps
Figure 1–3 SCSI Host Adapter Model A4107A
Term ination Resistor
Packs UC1, UC2, UC3
SCSI Adapter ID
Switch Packs "S1"
Faceplate
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2
Cabling the RAID Subsystem Cluster
Components
This chapter provides the procedures for interconnecting two HP host servers and a
shared StorageWorks RAID subsystem through the SCSI bus, and externally terminating
the bus as applicable. Interconnection procedures for locating the RAID subsystem in a
Mid-Bus, Hub-Radiant and End-Bus layout are provided, based upon the basic cluster
layout selected in Chapter 1.
2.1 Connecting RAID Subsystem Components through the SCSI Bus
Based on the basic RAID cluster (SCSI bus) layout option you have selected,
locate the procedures in this section (cross-referenced in Chapter 1, Table 1-1 of
this guide), to cable and terminate the cluster components through the SCSI bus.
When you have finished, reboot all the servers in the cluster.
NOTES
• The following procedures assume that the SCSI
host adapters have been prepared (e.g., on-
board resistor packs removed and SCSI IDs
set) as described in Chapter 1.
• For clarity in Figures 2-1 through 2-3, the
VHDCI
SCSI cables and terminators are shaded
and the HD68-pin (fast, wide SCSI) components
are white.
• Cables and terminators supplied with your RAID
subsystem supplement the components in your
RAID SCSI Connection Kit
. (See Chapter 1,
Table 1-2
).
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2.2 Mid-Bus RAID Cluster Layout - (SCSI Bus Interconnect)
To connect two HP hosts on the two ends of the SCSI bus (e.g., a Mid-Bus RAID
cluster layout), with a RAID subsystem, reference Figure 2-1 and follow these
steps:
1. Attach a Y-cable (BN21W-0B) to the HD68-pin host adapter on Host A.
2. Attach a Y-cable (BN21W-0B) to the HD68-pin host adapter on Host B.
3. Attach (compatible) end of a 5M adapter cable (BN38C-05) to one end of
the Y-cable attached to Host A.
4. Connect the other end (VHDCI compatible) of the adapter cable to the end
of a tri-link connector on a subsystem controller.
5. Attach (compatible) end of the short adapter cable (BN38E-0B) to one end
of the Y-cable attached to Host B.
6. Connect the other end (VHDCI-compatible) of the adapter cable to the end
of UltraSCSI cable BN37A-05.
7. Remove the terminator that occupies the tri-link connector on the subsystem
controller.
8. Attach the remaining end of the VHDCI UltraSCSI cable attached to Host A
to the available tri-link connector on the subsystem controller.
9. Connect a terminator (H879-AA) to the available end of the Y-cable on Host
A, and to the available end of the Y-cable on Host B.
Figure 2–1 Mid-Bus RAID Cluster Layout - (SCSI Bus Interconnect)
RA7000 or ESA10000
HOST A
HOST B
Subsystem
HD68 Host
Adapter
HD68 Host
Adapter
BN37A-0E
Tri-Link
BN21W -0B
Y-Cable
BN21W -0B
Y-Cable
Term inator
H 879-AA
BN38C-05
VHDCI-to-HD68
Adapter Cable
BN37A-05
VHDCI-to-VHDCI
UltraSCSI Cable
BN38E-0B
VHDCI-to-HD68
Adapter Cable
Term inato r
H879-AA
SH R-1092
2–2
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Chapter 2. Cabling the RAID Subsystem Cluster Components
2.3 HUB-Radiant RAID Cluster Layout - (SCSI Interconnect)
To connect two HP host servers to a RAID subsystem via use of a Hub (e.g., a
Hub-Radiant RAID cluster layout), reference Figure 2-2 and follow these steps:
1. Attach (compatible) end of the 5M adapter cable (BN38C-05) to the HD68-
pin host adapter on Host A.
2. Connect the other end of the adapter cable to a convenient hub port.
3. Attach the compatible end of the short adapter cable (BN38E-0B) to the
HD68-pin host adapter on Host B.
4. Connect the other end of the short adapter cable to the end of an UltraSCSI
cable (BN37A-05).
5. Attach the remaining end of the UltraSCSI cable to a convenient hub port.
6. Connect one end of an UltraSCSI cable (BN37A-05) to a subsystem
controller.
7. Attach the other end of the UltraSCSI cable to the remaining hub port.
8. Connect a terminator (H8863-AA) to the remaining tri-link connector on the
subsystem controller.
Figure 2–2 Hub-Radiant RAID Cluster Layout - (SCSI Bus Interconnect)
HOST A
HOST B
H D68 H ost
Adapter
HD68 Host
Adapter
DS-DWZZH-03
UltraSCSI HUB
(3-Port, VHDCI)
BN 38E-0B
VHDC I-to-HD68
A dapter Cable
BN38C-05
VHDCI-to-HD68
Adapter C able
BN 37A-05
V HDCI-to-VHD CI
UltraSC SI Cable
BN37A-0E
Tri-Link
BN37A-05
Term inator
H8863-AA
RA7000 or ESA10000
Subsystem
SHR-1093
In hub configurations, termination is internal to the hub.
NOTE:
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2.4 End-Bus RAID Cluster Layout - (SCSI Bus Interconnect)
To connect two HP host servers to a RAID subsystem located on the end of the
SCSI bus (e.g., an End-Bus RAID cluster layout), reference Figure 2-3 and
follow these steps:
1. Attach a Y-cable (BN21W-0B) to the HD68-pin host adapter on Host A.
2. Attach a Y-cable (BN21W-0B) to the HD68-pin host adapter on Host B.
3. Attach one end of the HD68-pin straight-thru cable (BN21K-05) to a
convenient end of the Y-cable attached to Host A.
4. Connect the other end of the cable to a convenient end of the Y-cable
attached to Host B.
5. Attach the compatible end of the 5M adapter cable (BN38C-05) to the
available end of the HD68-pin Y-cable attached to Host B.
6. Connect the other (VHDCI-compatible) end of the adapter cable to the
available end of a tri-link connector on a subsystem controller.
7. Connect terminator H8863-AA to the available end of a tri-link connector on
a subsystem controller.
8. Connect terminator H879-AA to the available end of the Y-cable attached to
Host A.
Figure 2–3 End-Bus RAID Cluster Layout - (SCSI Bus Interconnect)
RA7000 or ESA10000
H OST A
HOST B
Subsystem
HD68 Host
Adapter
HD68 Host
Adapter
Term inator
H8863-AA
BN 37A-0E
Tri-Link
BN 21W -0B
Y-Cable
BN21W -0B
Y-C able
Term inator
H879-AA
BN21K-05
H D68 Straight-Thru
BN38C-05
VHDCI-to-HD68
Adapter Cable
S HR -1094
2–4
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3
Software Setup Requirements for a Cluster
This chapter summarizes and describes in sequence each of the software setups
required to establish a high availability cluster environment between multiple HP-UX host
servers and a shared RAID storage subsystem.
3.1 Software Requirements Summary
The software setups required to establish a cluster between your RAID subsystem
and HP host servers must be performed in the sequence provided in this chapter,
which is as follows:
• Install the StorageWorks Command Console (SWCC) RAID Manager
software
• Create the RAID storageset configuration
• Install and configure MC/ServiceGuard cluster software on all clustered host
servers
• Install/configure the (HP) SCSI pass through device driver software on all
remaining host servers comprising the RAID subsystem cluster.
• Run the SWCC Failover Transition Module Installation Script
3.2 Installing the StorageWorks CC RAID Manager Software
The StorageWorks Command Console agent software, which enables
management of the RAID subsystem, must be installed and configured on any
host server in the cluster from which you choose to perform the initial cluster
configuration work. This server is designated as the “primary” host, and all other
servers in the cluster, “secondary”. This designation must remain constant
throughout the procedures described in this chapter.
Reference the Getting Started – HSZ70 Solutions Software V7.1 for HP-UX,
Chapters 3 and 4, for procedures to install the StorageWorks CC RAID Manager
Software on your primary host server. (Chapter 3 is required to prepare your
primary host server with the SPT device driver that facilitates communication
with the RAID subsystem, and for configuring the HP-UX file system).
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3.3 Creating the RAID StorageSet Configuration
Reference the
Getting Started – HSZ70 Solutions Software V7.1 for HP-UX,
Chapters 6 or 7 and Appendices A and B, to plan and create your RAID
(storageset) configuration.
3.4 Installing and Configuring HP MC/ServiceGuard Cluster Software
HP MC/ServiceGuard cluster software must be installed and configured on all
host servers that share the RAID subsystem.
CAUTION
If a server is connected to a cluster, but is not
configured with MC/ServiceGuard software,
undesirable conditions could result.
Reference the (HP)
manual to install and configure
Managing MC/ServiceGuard
MC/ServiceGuard cluster software on all (primary and secondary) HP host
servers that comprise your cluster.
NOTES
When you are using MC/ServiceGuard and
assigning the MAX_CONFIGURED_PACKAGES,
allow an extra package assignment for the SWCC
agent.
For a cluster containing more than two servers,
\.rhosts
The
or
file must contain the “hostname root”
“IPaddress root” of all servers in the
MC/ServiceGuard cluster, not just the two servers
connected to the RAID subsystem.
3–2
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Chapter 3. Software Setup Requirements for a Cluster
3.5 Running the SWCC Failover Transition Module Installation Script
The SWCC Failover Transition Module Installation Script automates the final
software configuration tasks required to establish failover of the StorageWorks
Command Console agent, which are:
• Install the (HP) SCSI pass through device drivers on all the remaining
clustered servers. (These drivers should already reside on your
host,
primary
via the SWCC agent installation process performed in Section 3.2).
WARNING
Installing the SCSI pass through drivers requires a
reboot of all servers on which it will be installed.
• Install the SWCC Failover Transition Module (agent) in an MC/ServiceGuard
“package” on all clustered servers.
In order for the SWCC RAID Manager agent to failover in the case of a server
shutdown, it must be installed in a “package” in the MC/ServiceGuard software
that resides on each host server. A copy of the package resides on all hosts.
Under normal operating conditions, the RAID Manager will run on the primary
host only. When the primary host is unavailable as in a failover,
MC/ServiceGuard will start up the RAID Manager on a secondary, assigned
takeover host.
To obtain and invoke the SWCC Failover Transition Module Installation Script
required for your MC/ServiceGuard cluster configuration, proceed as follows:
1. Download a copy of the tar file (ha_stm_hp01.tar) into your
from the following StorageWorks website address:
directory,
/tmp
2. Set your current directory to
/tmp
3. Extract the script software from the downloaded files by issuing this
command:
#
tar xvf /tmp/ha_stm_hp01.tar
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NOTES
You MUST be root to proceed with the installation
process.
The capital letter at the end of each script prompt
represents the default response.
4. Run the shell script by issuing this command:
# /tmp/ha_install_hp.sh
The SWCC Failover Transition Module Installation Script will prompt you to
make several selections regarding your specific cluster configuration options. For
the seamless failover of the SWCC transition module agent, be prepared to
provide the script with the following information as prompted:
•
•
•
name of root directory to place the SWCC software
subnet address of the cluster
dedicated IP address for the SWCC failover agent
(this is the IP address used by the SWCC client in order for you to configure
and monitor the RAID subsystem within the cluster)
The installation of the SWCC Failover Transition Module in your cluster is now
complete. Reference your (HP) manual for
Managing MC/ServiceGuard
procedures to test server failover, and to monitor and manage your cluster.
3–4
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A
Cabling and Termination Required to Expand a
Cluster
This appendix summarizes how to expand a basic (two-server, single RAID subsystem)
cluster to support additional servers and/or a second RAID subsystem. This appendix
assumes that the pre-installation, hardware and software configuration procedures for a
basic cluster have been performed as described in this guide, and focuses only on the
procedures required for cluster expansion.
A.1 Hardware Configuration of an Expanded Cluster
A basic cluster, (2 server, single RAID subsystem) configured in an End-Bus
RAID or Mid-Bus RAID cluster layout, can be expanded in two ways:
1. By adding host servers to a single SCSI bus
2. By adding a second RAID subsystem via a separate SCSI bus
Figure A-1 shows an expanded cluster, where one or more servers have been
added the cluster by extending the SCSI bus of the basic cluster, and a second
RAID subsystem has been added on a separate SCSI bus. Both RAID subsystems
can be accessed by all clustered servers.
The two heartbeats shown in Figure A-1 represent the failover capabilities
configurable between clustered servers using MC/ServiceGuard software. In
other words, all servers with MC/ServiceGuard software can be configured to
failover any other server in the cluster that has MC/ServiceGuard software.
The cabling and termination required to expand a cluster are discussed and
illustrated in the following sections.
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Figure A–1 Expanded Cluster
Network Inconnect
Heartbeat 1
Heartbeat 2
Server C
Server A
Server B
A
A
A
A
A
A
SCSI Bus
Termination
1
Clients
SC SI Bus 1
Te r m in at ion
SCSI Bus 2
Termination
S CSI Bus
2
Term ination
Raid
Subsystem
R aid
Subsystem
SHR-1131
A.1.1 Adding Host Servers to an Existing Cluster
Each host server added to a cluster requires the following cables:
Part No.
Description
BN21K-xx
BN21W-0B
HD68-Pin straight-thru
HD68-Pin Y-cable
A–2
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Appendix A. Cabling and Termination Required to Expand a Cluster
To add a host server to a basic End-Bus or Mid-Bus RAID subsystem cluster,
reference Figure A-2 and proceed as follows:
1. Follow normal procedures to backup the all the devices in the existing
cluster.
2. Follow normal procedures to power down all the devices in the existing
cluster.
3. Attach a Y-cable (BN21W-0B) to the SCSI host adapter of the server being
added to the cluster.
4. Connect cable BN21K-05 (HD68-pin straight-thru) to an end of the Y-cable
just attached to your new server.
5. Remove the external terminator (H879AA) connected to the end of the Y-
cable of the
server on the SCSI bus in your existing cluster.
last
6. Attach the terminator just removed, to the remaining end of the Y-cable
connected to your new server.
7. Connect one end of cable BN21K-05 (HD68-Pin straight-thru) to the end of
the Y-cable of the server from which the terminator was removed.
8. Connect the other end of cable BN21K-05 to the available end of the Y-
cable of your new server.
Figure A–2 Adding Host Servers to an Existing Cluster
Host Server
Host Ada pter
Host Server
H ost A dapter
BN 21W -08
BN 21W -08
HD 68 Pin
Y- C able
HD 68 Pin
Y- Cable
C onne cts To
N ext Server or
T he R aid System
E nd O f B us
M ust Be Term inated
(Term inato r H8 79AA )
B N 21 K05
(H D 68 P in Straight T hru)
S HR -112 8
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A–3
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NOTES
Repeat these procedures for each new server to
be added to the cluster. When finished, follow
normal procedures to power-up all cluster
devices.
Make sure that each server added to the cluster is
configured for a cluster, according to Chapter 3 of
this guide.
A.1.2 Adding a Second RAID Subsystem to an Existing Cluster
A second RAID subsystem can be added to an existing cluster by building a
second, separate SCSI bus between the existing clustered servers and the new
RAID subsystem. This requires a second SCSI host adapter be prepared and
installed (reference Chapter 1,
), in each of the host servers
Pre-Installation Steps
comprising the cluster. In this scenario, both RAID subsystems can be shared by
all clustered servers. Figure A-1 illustrates the cluster layout when a second
subsystem (and more than two servers) are added to a
cluster layout.
subsystem
Mid-Bus RAID
NOTES
The second RAID subsystem must be configured
as defined in the RoadMap of the Getting Started
section of this guide.
Follow normal procedures to backup the existing
cluster devices and then power down the cluster
devices prior to connecting the second
subsystem.
Reference Chapter 2,
for the parts
“Cabling the RAID Subsystem Components”
and procedures required to cable and terminate a SCSI bus, integrating the
following differences that apply to the second subsystem:
1. Physically cable the second RAID subsystem to the same two host servers as
the first (existing) RAID subsystem.
2. Connect the Y-cables to the second host adapter in each server.
3. Be sure to terminate both ends of the second SCSI bus.
A–4
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B
De-Installing the StorageWorks Command
Console Agent
This appendix describes how to reverse the installation of the StorageWorks CC Agent
within a cluster.
B.1 StorageWorks CC Agent De-Installation Procedures
To de-install the CC agent (and the CC agent package) from the cluster, enter the
following command:
# /base_dir/steam/bin/stgwks.sh
Select menu option 4 of the first menu. Then select menu option 5 of the
subsequent menu. You will be prompted to exit to remove pass-through drivers,
if installed, and then prompted to confirm the directory location. Answer yes to
both prompts to remove the CC agent and the MC/ServiceGuard CC agent
“package” from the cluster.
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