Forcing a Varyon
A volume group with quorum disabled and one or more physical volumes unavailable can be “forced” to vary on by using the
The HACMP for AIX software assumes that a volume group is not degraded and all physical volumes are available when the varyonvg command is issued at startup or when a volume group resource is taken over during a fallover.
The cluster event scripts provided with the HACMP for AIX software do not “force” varyon with the
Quorum in Non-Concurrent Access Configurations
While specific scenarios can be constructed where quorum protection does provide some level of protection against data corruption and loss of availability, quorum provides very little actual protection in
Quorum in Concurrent Access Configurations
Quorum must be enabled for an HACMP for AIX concurrent access configuration. Disabling quorum could result in data corruption. Any concurrent access configuration where multiple failures could result in no common shared disk between cluster nodes has the potential for data corruption or inconsistency.
3.4.6 Alternate Method - TaskGuide
The TaskGuide is a graphical interface that simplifies the task of creating a shared volume group within an HACMP cluster configuration. The TaskGuide presents a series of panels that guide the user through the steps of specifying initial and sharing nodes, disks, concurrent or