Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Note that because four subdisks are specified, but the number of columns is not
specified, the vxmake command assumes a four-column RAID-5 plex and places
one subdisk in each column. Striped plexes are created using the same method
except that the layout is specified as stripe. If the subdisks are to be created and
added later, use the following command to create the plex:
# vxmake -g mydg plex raidplex layout=raid5 ncolumn=4 stwidth=32
If no subdisks are specified, the ncolumn attribute must be specified. Subdisks can
be added to the plex later using the vxsd assoc command.
See “Associating subdisks with plexes” on page 253.
If each column in a RAID-5 plex is to be created from multiple subdisks which
may span several physical disks, you can specify to which column each subdisk
should be added. For example, to create a three-column RAID-5 plex using six
subdisks, use the following form of the vxmake command:
# vxmake -g mydg plex raidplex layout=raid5 stwidth=32 \
sd=mydg00-00:0,mydg01-00:1,mydg02-00:2,mydg03-00:0, \
mydg04-00:1,mydg05-00:2
This command stacks subdisks mydg00-00 and mydg03-00 consecutively in column
0, subdisks mydg01-00 and mydg04-00 consecutively in column 1, and subdisks
mydg02-00 and mydg05-00 in column 2. Offsets can also be specified to create
sparse RAID-5 plexes, as for striped plexes.
Log plexes may be created as default concatenated plexes by not specifying a
layout, for example:
# vxmake -g mydg plex raidlog1 sd=mydg06-00
# vxmake -g mydg plex raidlog2 sd=mydg07-00
The following command creates a RAID-5 volume, and associates the prepared
RAID-5 plex and RAID-5 log plexes with it:
# vxmake -g mydg -Uraid5 vol raidvol \
plex=raidplex,raidlog1,raidlog2
Each RAID-5 volume has one RAID-5 plex where the data and parity are stored.
Any other plexes associated with the volume are used as RAID-5 log plexes to log
information about data and parity being written to the volume.
After creating a volume using vxmake, you must initialize it before it can be used.
See “Initializing and starting a volume” on page 303.
301Creating volumes
Creating a volume using vxmake