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

Creating a Striped Plex
148 VERITAS Volume Manager Administrator’s Guide
Creating a Striped Plex
To create a striped plex, you must specify additional attributes. For example, to create a
striped plex named pl-01 with a stripe width of 32 sectors and 2 columns, use the
following command:
# vxmake plex pl-01 layout=stripe stwidth=32 ncolumn=2 \
sd=disk01-01,disk02-01
To use a plex to build a volume, you must associate the plex with the volume. For more
information, see the section, “Attaching and Associating Plexes” on page 153.
Displaying Plex Information
Listing plexes helps identify free plexes for building volumes. Use the plex (–p) option to
the vxprint command to list information about all plexes.
To display detailed information about all plexes in the system, use the following
command:
# vxprint -lp
To display detailed information about a specific plex, use the following command:
# vxprint -l plex
The –t option prints a single line of information about the plex. To list free plexes, use the
following command:
# vxprint -pt
The following section describes the meaning of the various plex states that may be
displayed in the STATE field of vxprint output.
Plex States
Plex states reflect whether or not plexes are complete and are consistent copies (mirrors)
of the volume contents. VxVM utilities automatically maintain the plex state. However, if
a volume should not be written to because there are changes to that volume and if a plex
is associated with that volume,you can modifythe state of the plex. For example, if a disk
with a particular plex located on it begins to fail, you can temporarily disable that plex.
Note A plex doesnot have to beassociated with a volume. A plex canbe created with the
vxmake plex command and be attached to a volume later.