VERITAS Volume Manager 3.1 Storage Administrator Administrator's Guide

Volume Tasks
Creating a Volume
Chapter 4 159
click OK.
To create a mirrored volume
This procedure creates a concatenated or striped volume that is mirrored
(copied) on at least one other disk. If one of the disks fails, the volume’s
data can be accessed from the surviving disk(s).
You can use this procedure to create a regular mirrored volume or a
layered mirrored volume. Concatenated pro and striped pro volumes are
layered and mirrored by default.
Step 1. Select the appropriate host machine.
Step 2. Choose File > New > Volume (menu) or Volume Create (Command
Launcher).
Step 3. Complete the New Volume dialog box as follows:
Notes:
• This task requires a disk group name, volume name, volume size, and
volume layout.
• A RAID-5 volume requires at least three disks. If logging is enabled, a
RAID-5 volume requires at least four disks.
• RAID-5 volumes cannot be mirrored.
• The volume size should be less than or equal to the available free
space on the disk(s).
• For a RAID-5 volume, the size specified in the Size field is the usable
space in the volume. The Volume Manager allocates additional space
for the volume’s parity information. The disks across which the
RAID-5 volume will be striped should therefore contain additional
free space for the volume’s parity information.
• If no disks are assigned, the Volume Manager uses available space on
disks in the selected disk group.
• If a file system is placed on the volume and the Mount at Boot option
is selected, the file system table file is automatically updated.
Disk Group Name: Either accept the default disk group or click Browse
to select another disk group.
Volume Name: Type the new volume’s name (or accept the default
name).