Veritas Volume Manager – Creating a Volume

1. Creating a Volume
1.1 Creating a Concatenated Volume

By default, vxassist creates a concatenated volume using the space available on a disk or on the number of disks in a diskgroup if the volume size specified is more then the one available on a single disk.

Disks can be specified from a diskgroup for a volume group but if not mentioned available disks are selected by the volume manager.

Command syntax :

· #vxassist make volume_name volume_length

To create a new volume appvol of 100 MB in the default disk group rootdg with available disks:
· #vxassist make appvol 100m

To create the volume appvol of 100MB on disk03
· #vxassist make appvol 100m disk03

1.2 Creating a Striped Volume

A striped volume contains at least one plex that consists of two or more subdisks located on two or more physical disks.

Command Syntax

· vxassist make volume_name length layout=stripe

To create a striped volume appvol2 with the default stripe unit size on the default number of disks
· #vxassist make appvol2 100m layout=stripe

To create a striped volume appvol2 100MB striped volume on three specific disks.
· #vxassist make appvol2 100m layout=stripe disk04 disk05 disk06

1.3 Creating a RAID-5 Volume
A RAID-5 volume contains a RAID-5 plex that consists of two or more subdisks located on two or more physical disks. Only one RAID-5 plex can exist per volume. A RAID-5 volume may also contain one or more RAID-5 log plexes, which are used to log information about data and parity being written to the volume.

Command Syntax :

· vxassist make volume_name length layout=raid5

To create the RAID-5 volume appvol4 with the default stripe unit size on the default number of disks with RAID-5 log,
· #vxassist make appvol4 100m layout=raid5.