HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide
Table Of Contents
- HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide
- About this Guide
- 1- Planning a Subsystem
- Defining Subsystems
- What is Failover Mode?
- Selecting a Cache Mode
- Enabling Mirrored Caching
- What is the Command Console LUN?
- Determining Connections
- Assigning Unit Numbers
- What is Selective Storage Presentation?
- 2- Planning Storage Configurations
- Where to Start
- Determining Storage Requirements
- Configuration Rules for the Controller
- Addressing Conventions for Device PTL
- Choosing a Container Type
- Creating a Storageset Profile
- Planning Considerations for Storageset
- Changing Characteristics through Switches
- Specifying Storageset and Partition Switches
- Specifying Initialization Switches
- Specifying Unit Switches
- Creating Storage Maps
- 3- Preparing the Host System
- Installing RAID Array Storage System
- Making a Physical Connection
- Preparing LUNs for Access by Tru64 UNIX FileSystem
- DECsafe Available Server Environment (ASE)
- HSG80 Units and Tru64 UNIX Utilities
- Solution Software Upgrade Procedures
- New Features, ACS 8.7 for Tru64
- 4- Installing and Configuring HSG Agent
- 5- FC Configuration Procedures
- Establishing a Local Connection
- Setting Up a Single Controller
- Setting Up a Controller Pair
- Configuring Devices
- Configuring Storage Containers
- Assigning Unit Numbers and Unit Qualifiers
- Configuration Options
- Verifying Storage Configuration from Host
- 6- Using CLI for Configuration
- 7- Backing Up, Cloning, and Moving Data
- A- Subsystem Profile Templates
- Storageset Profile
- Storage Map Template 1 for the BA370 Enclosure
- Storage Map Template 2 for the second BA370 Enclosure
- Storage Map Template 3 for the third BA370 Enclosure
- Storage Map Template 4 for the Model 4214R Disk Enclosure
- Storage Map Template 5 for the Model 4254 Disk Enclosure
- Storage Map Template 6 for the Model 4310R Disk Enclosure
- Storage Map Template 7 for the Model 4350R Disk Enclosure
- Storage Map Template 8 for the Model 4314R Disk Enclosure
- Storage Map Template 9 for the Model 4354R Disk Enclosure
- B- Installing, Configuring, and Removing the Client
- C- SWCC Agent in TruCluster Environment
- SWCC Overview
- Running the SWCC Agent on a V4.0G Cluster
- Running the SWCC Agent under ASE Services
- Running the SWCC Agent on a V5.x Cluster
- Problems with Running the Agent on Multiple Clusters
- Configure the Controller
- Use Multiple-Bus Failover Mode
- Verify That the HSG80/HSG60 Unit Offsets Are Zero
- Install and Run the Agent on One Cluster Member
- Example of Installing the Agent on a Cluster Member
- Create the CAA Action Script
- Create the CAA Resource
- Glossary
- Index
Planning a Subsystem
1–19HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
1–19
Matching Units to Host Connections in Multiple-Bus Failover
Mode
In multiple-bus failover mode, the ADD UNIT command creates a unit for host
connections to access. All unit numbers (0 through 199) are potentially visible on all
four controller ports, but are accessible only to those host connections for which
access path is enabled and which have offsets in the unit's range.
The LUN number a host connection assigns to a unit is a function of the
UNIT_OFFSET switch of the
ADD (or SET) CONNECTIONS command. The default offset is 0.
The relationship of offset, LUN number, and unit number is shown in the following
equation:
LUN number = unit number – offset
Where...
— LUN number is relative to the host (number the host sees the unit as)
— Unit number is relative to the controller (number the controller sees the unit
as)
For example, unit D7 would be visible to a host connection with an offset of 0 as LUN
7 (unit number of 7 minus offset of 0). Unit D17 would be visible to a host connection
with an offset of 10 as LUN 7 (unit number of 17 minus offset of 10). The unit would
not be visible at all to a host connection with a unit offset of 18 or greater, because that
offset is not within the units range (unit number of 17 minus offset of 18 is a negative
number).
In addition, the access path to the host connection must be enabled for the connection
to access the unit. This is done through the ENABLE_ACCESS_PATH switch of the
ADD UNIT (or SET unit) command.
The PREFERRED_PATH switch of the ADD UNIT (or SET unit) command determines
which controller of a dual-redundant pair initially accesses the unit. Initially,
PREFERRED_PATH determines which controller presents the unit as Ready. The
other controller presents the unit as Not Ready. Hosts can issue a SCSI
Start Unit
command to move the unit from one controller to the other.
Assigning Unit Numbers Depending on SCSI_VERSION
The SCSI_VERSION switch of the SET THIS_CONTROLLER/OTHER_CONTROLLER command
determines how the CCL is presented. There are two choices: SCSI-2 and SCSI-3. The
choice for SCSI_VERSION affects how certain unit numbers and certain host
connection offsets interact.