VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Disk Groups
Managing the Configuration Daemon in VxVM
Chapter 4 195
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 requests from VxVM utilities,
communicates the change requests to the VxVM 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
If your system is configured to use Dynamic Multipathing (DMP), you
can also use vxdctl to:
• reconfigure the DMP database to include disk devices newly attached
to, or removed from the system
• create DMP device nodes in the directories /dev/vx/dmp and
/dev/vx/rdmp
• update the DMP database with changes in path type for
active/passive disk arrays. Use the utilities provided by the
disk-array vendor to change the path type between primary and
secondary
For more information about how to use vxdctl, refer to the vxdctl(1M)
manual page.