VERITAS Volume Manager 3.1 Administrator's Guide

Volume Manager Operations
Common Volume Manager Commands
Chapter 3 135
min_nstripe=2
# for RAID-5, by default create between 3 and 8 stripe columns
max_nraid5stripe=8
min_nraid5stripe=3
# create 1 log copy for both mirroring and RAID-5 volumes, by
default
nregionlog=1
nraid5log=1
# by default, limit mirroring log lengths to 32Kbytes
max_regionloglen=32k
# use 64K as the default stripe unit size for regular volumes
stripe_stwid=64k
# use 16K as the default stripe unit size for RAID-5 volumes
raid5_stwid=16k
vxdctl Daemon
The volume configuration daemon (vxconfigd) is the interface between
the Volume Manager commands and the kernel device drivers (vol, vols,
DMP). The config device is a special device file created by the Volume
Manager that interacts with vxdctl to make system configuration
changes.
Some vxdctl tasks involve modifications to the volboot file that
indicates the location of some root configuration copies.
The vxdctl daemon is the interface to vxconfigd and is used for:
• performing tasks related to the state of the vxconfigd daemon
• managing boot information and Volume Manager root configuration
initialization
• manipulating the contents of the volboot file that contains a list of
disks containing root configuration databases (this is not normally
necessary, as Volume Manager automatically locates all disks on the
system)
reconfiguring the DMP database (if used on your system) to reflect
new disk devices attached to the system, and removal of any disk
devices from the system
• creating DMP (if used on your system) device nodes in the device
directories /dev/vx/dmp and /dev/vx/rdmp
• reflecting the change in path type into the DMP database for