HSG80 ACS Solution Software V8.6 for IBM AIM Installation and Configuration Guide

Planning Storage 2–23
Guidelines for Partitioning Storagesets and Disk Drives
Keep these points in mind when planning partitions for storagesets and disks:
■ Each storageset or disk drive may have up to eight partitions.
■ In transparent failover mode, all partitions of a particular container must be on the
same host port. Partitions cannot be split across host ports.
■ Partitions cannot be combined into storagesets. For example, you cannot divide a disk
drive into three partitions, then combine those partitions into a RAIDset.
■ Just as with storagesets, you do not have to assign unit numbers to partitions until you
are ready to use them.
■ The CLONE utility cannot be used with partitioned mirrorsets or partitioned stripesets.
(See “Cloning Data for Backup,” page 8–2 for details about cloning.)
Changing Characteristics through
Switches
CLI command switches allow the user another level of command options. There are three
types of switches that modify the storageset and unit characteristics:
■ Storageset switches
■ Initialization switches
■ Unit switches
The following sections describe how to enable/modify switches. They also contain a
description of the major CLI command switches.
Enabling Switches
If you use SWCC to configure the device or storageset, you can set switches from the
SWCC screens during the configuration process, and SWCC automatically applies them
to the storageset or device. See the SWCC online help for information about using SWCC.
If you use CLI commands to configure the storageset or device manually, the
configuration procedure found in Chapter 5 of this guide indicates when and how to
enable each switch. The Compaq StorageWorks HSG80 Array Controller ACS Version 8.6
CLI Reference Guide contains the details of the CLI commands and their switches.