HP Veritas Volume Manager 5.0 -UX 11i v3 Creating a striped plex, Displaying plex information

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Creating and administering plexes

Creating a striped plex

Creating a striped plex

To create a striped plex, you must specify additional attributes. For example, to create a striped plex named pl-01in the disk group, mydg, with a stripe width of 32 sectors and 2 columns, use the following command:

#vxmake -g mydg plex pl-01 layout=stripe stwidth=32 ncolumn=2 \ sd=mydg01-01,mydg02-01

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 229.

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 [-g diskgroup] -l plex

The -toption 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 modify the 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 does not have to be associated with a volume. A plex can be created with the vxmake plex command and be attached to a volume later.