HSG80 ACS Solution Software Version 8.7 for Compaq OpenVMS Installation and Configuration Guide

Contents
iv HSG80 ACS Solution Software Version 8.7 for Compaq OpenVMS Installation and
Configuration Guide
Assigning Unit Numbers Depending on SCSI_VERSION . . . . . . . . . . . . . . . . . . 1–13
Assigning Host Connection Offsets and Unit Numbers in SCSI-3 Mode. . . . 1–13
Assigning Host Connection Offsets and Unit Numbers in SCSI-2 Mode. . . . 1–13
Assigning Unit Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–14
Using CLI to Specify Identifier for a Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–14
Using SWCC to Specify LUN ID Alias for a Virtual Disk. . . . . . . . . . . . . . . 1–15
What is Selective Storage Presentation?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–15
Restricting Host Access by Disabling Access Paths . . . . . . . . . . . . . . . . . . . . 1–15
Restricting Host Access in Multiple-Bus Failover Mode . . . . . . . . . . . . . . . . . . . 1–16
Enable the Access Path of Selected Host Connections . . . . . . . . . . . . . . . . . . 1–16
Restricting Host Access by Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–18
Worldwide Names (Node IDs and Port IDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–19
Restoring Worldwide Names (Node IDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20
Unit Worldwide Names (LUN IDs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–21
2 Planning Storage Configurations
Where to Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Determining Storage Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Configuration Rules for the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Addressing Conventions for Device PTL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Examples - Model 2200 Storage Maps, PTL Addressing . . . . . . . . . . . . . . . . . . . . 2–7
Choosing a Container Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
Creating a Storageset Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
Planning Considerations for Storageset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
Stripeset Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
Mirrorset Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–21
Keep these points in mind when planning mirrorsets . . . . . . . . . . . . . . . . . . . 2–22
RAIDset Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–22
Keep these points in mind when planning RAIDsets . . . . . . . . . . . . . . . . . . . 2–23
Striped Mirrorset Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–24
Storageset Expansion Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–26
Partition Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–26
Defining a Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–27
Guidelines for Partitioning Storagesets and Disk Drives . . . . . . . . . . . . . . . . 2–27
Changing Characteristics through Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–27
Enabling Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28
Changing Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28
Specifying Storageset and Partition Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28