VERITAS Volume Manager 3.1 Administrator's Guide

Volume Manager Operations
Volume Manager Rootability
Chapter 3 121
Boot Time Volume Restrictions
The volumes that need to be available at boot time have some very
specific restrictions on their configuration. These restrictions include
their names, the disk group they are in, their volume usage types, and
they must be single subdisk, contiguous volumes. These restrictions are
detailed below:
• Disk Group
All volumes on the boot disk must be in the rootdg disk group.
• Names
The names of the volumes that will have entries in the LIF LABEL
record must be rootvol, standvol, and swapvol. If there is an
optional dump volume to be added to the LIF LABEL, then its name
must be dumpvol.
• Usage Types
The rootvol and swapvol volumes have specific volume usage types
named usage type root and swap respectively.
• Contiguous Volumes
Any volume that will have an entry in the LIF LABEL record must be
contiguous. It can have only one subdisk and it cannot span to
another disk.
• Mirrored Root Volumes
All the volumes on the boot disk can be mirrored. If you want the
mirror of the boot disk also to be bootable, then the above restrictions
apply to the mirror disk as well. A VxVM-rootable boot disk can be
mirrored with vxrootmir (1M). You can set up mirrors of selected
volumes on the boot disk for enhanced performance (for example,
striped or spanned), but the resultant mirrors will not be bootable.