VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Managing the Configuration Daemon in VxVM
136 VERITAS Volume Manager Administrator’s Guide
It may sometimes be necessary to create a disk group for an older version. The default
disk group version for a disk group created on a system running VERITAS Volume
Manager 3.5 is 90. Such a disk group would not be importable on a system running
VERITAS Volume Manager 2.3, which only supports up to version 40. Therefore, to create
a disk group on a system running VERITAS Volume Manager 3.5 that can be imported by
a system running VERITAS Volume Manager 2.3, the disk group must be created with a
version of 40 or less.
To create a disk group with a previous version, specify the -T version option to the vxdg
init command. For example,to createa disk group withversion 40 that can be imported
by a system running VxVM 2.3, use the following command:
# vxdg -T 40 init newdg newdg01=c0t3d0
This creates a disk group, newdg, which can be imported by VERITAS Volume Manager
2.3. Note that while this disk group can be imported on the VxVM 2.3 system, attempts to
use features from VERITAS Volume Manager 3.0 and later releases will fail.
Managing the Configuration Daemon in VxVM
The VxVM configuration daemon (vxconfigd) provides the interface between VxVM
commands and the kernel device drivers. vxconfigd handles configuration change
requestsfromVxVM utilities, communicates thechange requeststo theVxVM kernel, and
modifies configuration information stored on disk. vxconfigd also initializes VxVM
when the system is booted.
The vxdctl command is the interface to the vxconfigd daemon.
You can use vxdctl to:
◆ control the operation of the vxconfigd daemon
◆ manage the initialization of the rootdg disk group configuration
◆ manipulate the contents of the volboot file which contains a list of disks that have
rootdg disk group configuration databases
If only simple disks exist in rootdg, the vxconfigd daemon cannot read the
rootdg configuration without the existence of a /etc/vx/volboot file. The
volboot file contains entries for disks that contain rootdg configuration databases.
To add an entry for a disk to the volboot file, use the following command where
device is the disk access name of the disk device to be added:
# vxdctl add disk device