Veritas 4.1 Installation Guide (HP-UX 11i v3, February 2007)

Table 4-2 Following types of volume creation operations are supported: (continued)
SyntaxDescriptionVolume Creation Task
# vxassist -g <diskgroup> make volume length
layout=layout \
logtype=drl [nlog=n] [loglen=size] [other
attributes]
See vxassist (1M), for more information on the supported
options.
Dirty Region Logging
(DRL), if enabled,
speeds recovery of
mirrored volumes after
a system crash.
Creating Dirty Region
Enables (DRL) Volumes
# vxassist [-b] -g <diskgroup> make volume
length layout=stripe
See vxassist (1M), for more information on the supported
options.
A striped volume
contains at least one
plex that consists of two
or more subdisks
located on two or more
physical disks.
Creating a striped volume
# vxassist [-b] -g <diskgroup> make volume
length
layout=mirror-stripe [nmirror=number_mirrors]
\
[ncol=number_of_columns] [stripewidth=size]
See vxassist (1M), for more information on the supported
options.
A mirrored-stripe
volume mirrors several
striped data plexes.
Creating Mirrored-Stripped
Volumes
# vxassist [-b] -g <diskgroup> make volume
length \
layout=stripe-mirror [nmirror=number_mirrors]
\
[ncol=number_of_columns] [stripewidth=size]
See vxassist (1M), for more information on the supported
options.
A striped-mirror volume
is an example of a
layered volume which
stripes several
underlying mirror
volumes.
Creating Striped-Mirrored
Volumes
# vxassist [-b] -g <diskgroup> make volume
length layout=raid5 \
[ncol=number_of_columns] [stripewidth=size]
[nlog=number] \
[loglen=log_length]
See vxassist (1M), for more information on the supported
options.
A RAID-5 volume
contains a RAID-5 data
plex that consists of
three or more subdisks
located on three or more
physical disks. Only one
RAID-5 data plex can
exist per volume. A
RAID-5 volume can also
contain one or more
RAID-5 log plexes,
which are used to log
information about data
and parity being written
to the volume.
Creating RAID-5 Volumes
Advanced Approach
The advanced approach consists of a sequence of commands that must be run. These
commands use a “building block” approach that requires you to have a detailed knowledge
of the underlying structure and components to manually run the commands necessary to
accomplish a certain task.
1. Create subdisks using vxmake sd.
See vxmake (1M), for more information on the supported options.
2. Create plexes using vxmake plex, and associate subdisks with them.
See vxmake (1M), for more information on the supported options.
40 Setting up the Veritas 4.1 Products