Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

and a dg suffix. The dg suffix helps identify the object as a disk group. Also,

each disk name must be unique within the disk group.

■ Never create database files using file systems or volumes that are not in the

same disk group.

In earlier releases of Veritas Volume Manager, a system installed with VxVM was

configured with a default disk group, rootdg, that had to contain at least one disk.

VxVM can now function without any disk group having been configured. Only

when the first disk is placed under VxVM control must a disk group be configured.

Note: Most VxVM commands require superuser or equivalent privileges.

See “About tuning VxVM ” on page 299.

Creating a disk group

You can use the vxdg command to create a new disk group. A disk group must

contain at least one disk at the time it is created. You also have the option to create

a shared disk group for use in a cluster environment.

Disks must be placed in disk groups before they can be used by VxVM. You can

create disk groups to organize your disks into logical sets of disks.

Before creating a disk group, review the following:

■ Only disks that are online and do not belong

to a disk group can be used to create a disk

group.

■ The disk group name must be unique in the

host or cluster.

■ Creating a disk group requires at least one

disk.

Prerequisites

Setting up databases

Creating a disk group