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

Chapter 6, Creating and Administering Plexes
Attaching and Associating Plexes
153
Plex Kernel States
The plex kernel state indicates the accessibility of the plex to the volume driver which
monitors it.
Note No user intervention is required to set these states; they are maintained internally.
On a system that is operating properly, all plexes are enabled.
The following plex kernel states are defined:
DETACHED Plex Kernel State
Maintenance is being performed on the plex. Any write request to the volume is not
reflected in the plex. A read request from the volume is not satisfied from the plex. Plex
operations and ioctl function calls are accepted.
DISABLED Plex Kernel State
The plex is offline and cannot be accessed.
ENABLED Plex Kernel State
The plex is online. A write request to the volume is reflected in the plex. A read request
from the volume is satisfied from the plex.
Attaching and Associating Plexes
A plexbecomes aparticipating plex for a volumeby attaching it to a volume.(Attaching a
plex associates it with the volume and enables the plex for use.) To attach a plex to an
existing volume, use the following command:
# vxplex [-g diskgroup] att volume plex
For example, to attach a plex named vol01-02 to a volume named vol01, use the
following command:
# vxplex att vol01 vol01-02
If the volume does not already exist, a plex (or multiple plexes) can be associated with the
volume when it is created using the following command:
# vxmake [-g diskgroup] -U usetype vol volume plex=plex1[,plex2...]